Pressure Control Valves

Catalog HY15-351/US Contents RELIEF VALVES SEQUEN VALVES Control SERIES CAVITY DESCRIPTION FLOW PRESSURE PAGE NO. /GPM BAR/ DIRECT ACTING RDH42... C4-2... Direct Acting Relief, Poppet Type... 3.8/1... 35/5... 7-8 A2A2... C8-2... Direct Acting Relief, Ball Type... 6/1.6... 42/6... 9-1 A2B2... C8-2... Direct Acting Relief, Poppet Type...8/3... 42/6... 11-12 RD12... C1-2... Direct Acting Relief, Poppet Type...38/1... 25/36... 13-14 A4B2... C1-2... Direct Acting Relief, Poppet Type...1/26... 42/6... 15-16 A4B2*... C1-2... Direct Acting Relief, Poppet Type*... 17-18 A4C2... C1-2... Direct Acting Relief, Spool Type...2/53... 1/145... 19-2 * marked, PED Compliant DIFFERENTIAL AREA RDH83... C8-2... Direct Acting Differential Area Relief...53/14... 35/5... 21-22 RDH13... C1-2... Direct Acting Differential Area Relief...75/2... 35/5... 23-24 RD163... C16-2... Direct Acting Differential Area Relief...151/4... 21/3... 25-26 PILOT OPERATED RAH81... C8-2... Pilot Operated Spool Type...75.8/2... 35/5... 27-28 RAH11... C1-2... Pilot Operated Spool Type...113/3... 35/5... 29-3 RAH161... C16-2... Pilot Operated Spool Type...33/8... 38/55... 31-32 A6G2... C16-2... Pilot Operated Spool Type... 4/16... 42/6... 33-34 RAH21... C2-2... Pilot Operated Spool Type... 379/1... 35/5... 35-36 A4K2... C1-2... Pilot Operated Spool Type Kick Down...16/42... 42/6... 37-38 VENTAB RAH11V... C1-3... Pilot Operated Vented Relief...68/18... 38/55... 39-4 A4H3... C1-3S... Pilot Operated Vented Relief...19/5... 42/6... 41-42 A6H3... C16-3S... Pilot Operated Vented Relief... 4/16... 42/6... 43-44 CROSS-OVER A4J2... C1-2... Direct Acting Cross-over Relief...12/32... 35/5... 45-46 A4J2*... C1-2... Direct Acting Cross-over Relief*...12/32... 35/5... 47-48 * marked, PED Compliant UNLOADING RU11... C1-3... Direct Acting Unloading...3.75/1... 21/3... 49-5 M4A4J... C1-4... Direct Acting Piloting Unloading...2/.53... 42/6... 51-52 PILOT OPERATED WITH REVERSE CHECK A6P2... C16-2... Pilot Operated Poppet Type... 4/16... 42/6... 53-54 PILOT OPERATED H81... C8-3... Pilot Operated, Int. Pilot, Ext. Drain...45/12... 35/5... 55-56 H11... C1-3... Pilot Operated, Int. Pilot, Ext. Drain...56.3/15... 35/5... 57-58 H161... C16-3... Pilot Operated, Int. Pilot, Ext. Drain... 151.6/4... 35/5... 59-6 H12... C1-3... Pilot Operated, Ext. Pilot, Int. Drain...56.3/15... 35/5... 61-62 H162... C16-3... Pilot Operated, Ext. Pilot, Int. Drain... 151.6/4... 35/5... 63-64

Catalog HY15-351/US Contents Control SEQUEN VALVES SERIES CAVITY DESCRIPTION FLOW PRESSURE PAGE NO. /GPM BAR/ Pilot Operated (Continued) B4D3... C1-3S... Pilot Operated, Reverse, Ext. Drain...12/32... 42/6... 65-66 B4C3... C1-3S... Pilot Operated, Kick Down...16/42... 42/6... 67-68 DIRECT ACTING B2E3F... C8-3... Direct Acting, 2P-3W, Int. Pilot, Int. Drain...3/8... 42/6... 69-7 B4E3... C1-3... Direct Acting, 2P-3W, Int. Pilot, Int. Drain...5/13... 42/6... 71-72 B4F3... C1-3... Direct Acting, 2P-2W, NC, Ext. Pilot,... Int. Drain...34/9... 42/6... 73-74 B4G3... C1-3... Direct Acting, 2P-2W, NO, Ext. Pilot,... Int. Drain...4/1.6... 42/6... 75-76 B4H4... C1-4... Direct Acting, 2P-2W, NC, Ext. Pilot,... Ext. Drain...47/12... 42/6... 77-78 B4J4... C1-4... Direct Acting, 2P-2W, NO, Ext. Pilot,... Ext. Drain...47/12... 42/6... 79-8 B4K4... C1-4... Direct Acting, 2P-3W, NO, Ext. Pilot,... Int. Drain...42/11... 42/6... 81-82 REDUCING VALVES DIRECT ACTING C2A3... C8-3... Direct Acting Reducing/Relieving...2/5... 42/6... 83-84 PR13... C1-3... Direct Acting Reducing/Relieving...56/13... 21/3... 85-86 PILOT OPERATED PRH82... C8-3... Pilot Operated Reducing...3/8... 35/5... 87-88 PRH12... C1-3... Pilot Operated Reducing...56.3/15... 35/5... 89-9 PRH122... C12-3... Pilot Operated Reducing... 113.7/3... 35/5... 91-92 PRH162... C16-3... Pilot Operated Reducing...15/4... 35/5... 92-94 PRH81... C8-3... Pilot Operated Reducing/Relieving...3/8... 35/5... 95-96 PRH11... C1-3... Pilot Operated Reducing/Relieving...56.3/15... 35/5... 97-98 PRH121... C12-3... Pilot Operated Reducing/Relieving... 113.7/3... 35/5... 99-1 PRH161... C16-3... Pilot Operated Reducing/Relieving...15/4... 35/5... 11-12

Catalog HY15-351/US Tips Control INTRODUCTION This technical tips section is designed to help familiarize you with the Parker line of. In this section we highlight new products to this catalog as well as some design features of our pressure control line. In addition we present common options available to help you in selecting products for your application. Finally we give a brief synopsis of the operation and applications of the various product offered in this section. NEW PRODUCTS There are several new additions and product improvements to our product line. Here are just some of the design features and advantages to the Winner s Circle product line. Yellow Zinc Coating Steel adapters are coated with yellow zinc di-chromate for protection from salt spray. Variety of s controls are offered in screw adjust, knob adjust, fixed and tamper resistant configurations. High Design Pilot operated valves are rated to 35 (5 ) for use at elevated pressure. D -Ring Standard 431 Polyurethane Seal eliminates the need for backup rings providing easier manifold installation. (For more information on D -Ring see Section) Internal Screen A small internal screen protects the pilot orifice and spring chamber from debris. Crimp Design Fold over crimp provides secure holding and eliminates the need for adhesive. Guided Pilot Pilot is fully guided providing a more consistent reseat. High Rate Bias Spring Pilot operated reducing and sequence valves are designed with a high rate bias spring pressure, enhancing stability. Low Profile Adapter The low profile shape of the pilot operated pressure controls reduces the manifold clearance required. 1

Catalog HY15-351/US Tips Control COMMON OPTIONS As you will see, Parker offers a variety of Control products. As such, some of the options mentioned below may not be available on all valves. Consult the model coding and dimensions for each valve for specifics. Here are some of the common options available. Types: Parker offers four primary types of adjustments for most of the pressure control products. Samples of these types are shown below. Please note all options may not be available for all valves. Consult the individual catalog pages for more details. Screw - Valve can be adjusted with an allen wrench. Lock nut included to maintain desired setting after adjustment. This is the most common adjustment option available on most Parker products. Knob - An aluminum knob is added to the standard screw adjustment. A lock knob is provided to help maintain the desired setting after adjustment. Parker offers knob conversion kits for most pressure control valves. For kit numbers consult individual valve pages. Fixed Style - In most cases, the Fixed Style product is a screw adjustable product with a steel collet threaded over the screw adjustment. These valves are preset at the factory. Tamper Resistant - The tamper resistant option is a screw adjustable valve with a steel cap installed to conceal the adjustment. The cap is designed so that the internal edges clamp into the groove of the valve adapter. Once the cap is installed, it cannot be removed without damaging the cap and the valve. When a valve is ordered with the tamper resistant option, it will be preset at the factory, and the cap will be included in a separate plastic bag to allow for fine tuning at the customer site. Parker offers tamper resistant cap conversion kits for most pressure control valves. For kit numbers consult individual valve pages. Seals: The Winner s Circle products feature a standard 431 Polyurethane D -Ring. The D -Ring eliminates the need for backup rings. The majority of the products are available in Nitrile or Fluorocarbon Seals. You should match the seal compatibility to the temperature and fluid being used in your application. Range: Parker offers a range of spring settings for the Control product line. You want to choose the setting that best meets the operating range. The model callout is equivalent to the maximum setting (in psi) of the spring divided by 1 (i.e. 5 = 5 psi). 2

Catalog HY15-351/US Tips PRODUCT TYPES / APPLICATIONS Direct Acting Relief Direct acting relief valves are designed for fast response in intermittent duty applications. They are often used as an economical solution to clip pressure spikes. The poppet design allows for low leakage. Control OPERATION - The valve poppet is held against the seat by the spring force. Inlet pressure on the nose (port 1) of the poppet acts against the spring force to unseat the poppet at the valve setting and allow flow to pass to tank. Since the pressure is working directly on the spring, this valve is very fast responding. It is not the best choice for system pressure regulation as it is slightly noisier than pilot operated relief valves and has higher pressure rise. Note: Any backpressure on port 2 would be additive to the spring setting. Differential Area Relief Differential area relief valves also are also best suited for intermittent applications where fast response is critical. These valves are often used as crossover relief valves to chop pressure spikes. Due to their design, they generally can handle a larger flow rate and have a lower pressure rise than the standard directing acting relief. The poppet design allows for low leakage. Tank Tank OPERATION - on the inlet (port 2) of the valve acts on the differential area of the poppet (difference between the O.D. of the poppet and the seat diameter) to produce a force which is opposed by the spring force. When pressure reaches the valve setting, the poppet is pushed off its seat, permitting flow to tank. Note: Any backpressure on port 1 would be additive to the spring setting. Pilot Operated Relief Pilot operated relief valves are designed for continuous duty applications. Due to their stability and low pressure rise, the pilot operated relief is the best option for setting the pressure of a hydraulic system. OPERATION - When inlet pressure at the nose (port 1) exceeds the valve setting, the pilot ball unseats. The pilot flow creates a pressure imbalance across the main spool causing the spool to move and allowing flow from inlet (port) 1 to tank (port 2.) Note: Any backpressure on port 2 would be additive to the spring setting. Tank 3

Catalog HY15-351/US Tips Control Ventable Pilot Operated Relief Ventable relief valves are a unique type of pilot operated relief. With this valve, you can control the pressure setting with the internal adjustment as well as via remote circuit. These valves are ideal in cirucits where multiple pressures are needed. OPERATION - This valve can be controlled by the adjustment setting on the valve, or a remote circuit via the vent line. When the vent line is used, the smaller of the two pressure settings will determine the valve setting. In other words, if the pressure setting of the remote circuit is less than the adjusted setting, then the valve will relieve at the remote setting. If the pressure setting of the remote circuit is greater than the adjusted setting, then the valve will relieve at the adjusted setting. With the vent port (port 2) blocked, the valve operates like a standard pilot operated relief valve. Thus, a solenoid valve could be used on the vent port to select control between this valve another remote valve. Press. Inlet Vent Outlet Dual Crossover Relief Dual crossover relief valves provide pressure surge protection for double acting hydraulic actuators. For best results, you always want to install the valve as close to the actuator as possible. The dual crossover feature can be achieved in two different methods. One A A Control Valve RVA RVB Motor way is to manifold two Differential Area Relief into a single body. RVA Parker offers three versions of this two cartridge arrangement. The advantage gained is higher flows can be pushed through this arrangement. The second method is to combine this dual function into a single cartridge. RDH13 Series Relief Cartridge Valve (2 Ea.) The single cartridge arrangement reduces cost considerably of the total package. In addition, a standard common cavity line body can be used instead of a special two body arrangement. The operation for the single cartridge style is shown below. OPERATION - at port 1 acts on the spool to produce a force which is opposed by the spring setting. When pressure reaches the valve setting, the spool and poppet move relieving flow from port 1 to port 2. When port 2 is pressurized, the pressure acts on the differential area poppet to produce a force which is opposed by the spring force. When the pressure reaches the valve setting, the poppet is pushed off of its seat, relieving flow from port 2 to port 1. Note: Due to the construction and flow paths through the valve, the relief pressure settings may vary by approximately 3 psi from one direction to the other. B B Single Cartridge Style Differential Area Unloading Relief Valve Unloading valves are differential area relief valves that can also be fully Pilot dumped or unloaded via a remote signal. They are best suited for low flow accumulator unloading circuits. They provide a fixed percentage between load and unload pressures. This pilot valve would generally be used in conjunction with a logic element. RVB Tank Two Cartridge Style OPERATION - The fixed differential is provided by the pilot piston which has greater area than the dart seat. With its greater area, the piston is able to hold the dart off its seat, permitting flow from pressure to tank, until pressure on the pilot piston falls below the fixed percentage of the valve settings. Body 4

Catalog HY15-351/US Tips Pilot Operated Reducing Valve Pilot operated pressure reducing valves can be used to reduce the pressure in a leg of the circuit lower than system pressure. Thus, they can be used to provide protection to downstream components from higher pressures. Control OPERATION - The pilot section controls the valve setting when reducing. As pressure at the regulated port exceeds the valve setting, the pilot ball is unseated. The pilot flow creates a pressure imbalance across the main spool causing the spool to throttle in order to maintain constant downstream pressure. The normally open design will allow flow to pass from inlet to reduced port with the only restriction being the pressure drop. Reg. Press. Press. Inlet Drain Reducing / Relieving reducing / relieving valves can be used to reduce the pressure in a leg of the circuit lower than system pressure. The valve also acts as a relief valve, relieving any shocks or surges that occur between the regulated port and the actuator. When the valve is in the relieving mode, the inlet port is blocked. Parker offers pressure reducing/relieving valves in both pilot operated and directing acting styles. The direct acting version is generally used in static applications where response is critical, or leakage is a concern. Pilot Operated OPERATION - The pilot section controls Press. Inlet the valve setting when reducing. As Reg. pressure at the regulated port exceeds the valve setting, the pilot ball is unseated. The pilot flow creates a pressure imbalance across the main spool causing the spool to Relief throttle in order to maintain constant downstream pressure. A shock or surge at the regulated port shifts the spool, relieving flow to tank. Direct Acting OPERATION - As pressure at the regulated port exceeds the valve setting, the valve throttles or closes in order to maintain constant downstream pressure. A shock or surge at the regulated port further shifts the spool, relieving flow to tank. This valve is not intended for rapidly changing flows which could lead to instability. Inlet Reg. Relief Tank Tank 5

Catalog HY15-351/US Tips Control Pilot Operated Sequence Sequence valves are used to control the sequence of operation of two or more hydraulic actuators. The sequence valve pressure is set higher than the first actuator operation pressure. Once the first actuator has completed its cycle, the sequence valve opens allowing the second actuator to move. Parker s line of pilot operated sequence valves include a series of internally piloted, externally drained valves and a series of externally piloted, internally vented valves. Parker also offers a line of direct acting sequence valves which are ideal for piloting logic elements in steady state applications. P.O. Sequence (Internally Piloted, Externally Drained) OPERATION - For this valve, the pilot pressure is sensed from the inlet of the valve (port 1). When the pilot pressure exceeds the valve setting, the pilot section opens creating a pressure imbalance across the main spool. This causes the spool to move allowing the flow to pass from the nose of the cartridge (port 1) to the actuator port (port 2). By externally draining the pilot flow directly to tank (port 3), the valve is insensitive to back pressure at the sequence port. Press. Sequence Drain P.O. Sequence (Externally Piloted, Internally Vented) OPERATION - For this valve, the pilot pressure is obtained from an external source and not from the pressure port. When the external pilot pressure (port 1) exceeds the valve setting, the pilot section opens creating a pressure imbalance across the main spool. This causes the spool to move allowing the flow to pass from the side of the cartridge (port 2) to the actuator port (port 3). Any pressure at port 3 is additive to the pressure setting. It is most common for port 3 to be connected to tank. D.A. Sequence (Internally Piloted, Externally Drained) OPERATION - In the steady state condition, all three ports are blocked with the spring chamber drained to port 3. When the pressure at port 1 exceeds the valve setting, the spool moves allowing flow from the nose of the cartridge (port 1) to the actuator port (port 2). By externally draining the spring chamber directly to tank (port 3), the valve is insensitive to back pressure at the sequence port. D.A. Sequence, N.O. (Externally Piloted, Externally Drained) OPERATION - With no pressure at the pilot port (port 1), bi-directional flow is allowed between port 3 and port 2. When the pilot (4) pressure at port 1 exceeds the valve setting the spool moves blocking both port 3 and port 2. By externally draining the spring chamber to tank (port 4), the valve is insensitive to back pressure at the sequencing ports. D.A. Sequence, N.C. (Externally Piloted) OPERATION - With no pressure at the pilot port (port 1), both port 3 and port 2 are blocked. When the pilot pressure at port 1 exceeds the valve setting, the spool moves opening a path and allowing flow from port 3 to port 2. This valve internally drains the spring chamber to tank via the sequencing port, thus any backpressure on port 2 would be additive to the spring setting. Pilot Press. Inlet Sequence 6

Catalog HY15-351/US Information General Description Direct Acting Ball-Type Relief Valve. For additional information see Tips on pages 1-6. Direct Acting Relief Valve Series RDH42 Features Hardened, precision ground parts for durability Compact size for reduced space requirements Low leakage design Fast response All external parts zinc plated Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 3.8 (1 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 8% of crack pressure Leakage at 1 drops/min. (.66 cc/min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.3 kg (.7 lbs.) Cavity C4-2 (See Section for more details) Form Tool Rougher None Finisher NFT4-2F Performance Curve vs. Inlet ( rise through cartridge only) 6 5 345 4 276 3 27 2 138 1 414 69 1. 1.9 2.8 GPM 3.8.25.5.75 1. (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) 7

Catalog HY15-351/US Direct Acting Relief Valve Series RDH42 Information Dimensions Millimeters (Inches).14 Internal Hex. Ø 12.7 Knob (.5) 25.8 (1.2) Max. 27.3 (1.7) Max. 28. (1.1) 27.7 (1.9) 21. (.83) 7/16-2 UNF-2A Thread 9/16" Hex. 1 Nm (7 lb. ft.) Ø 8.6 (.34) Tamper Resistant Fixed THIRD-ANG PROJECTION Ordering Information RDH42 4 Size Direct Acting Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit Nitrile / (SK4-2) K Knob Adjust (852544) V Fluorocarbon / (SK4-2V) S Screw Adjust T Tamper Resistant Cap (852519) Optional Setting Code Range 3 6.9-27 (1-3 ) 13 (15 ) @ 1.9 (.5 GPM) 5 13-345 (15-5 ) 172 (25 ) @ 1.9 (.5 GPM) 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at 1.9 (.5 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4T SAE-4 (B4-2-*4T) * Add A for aluminum, omit for steel. 8

Catalog HY15-351/US Information General Description Direct Acting Ball-Type Relief Valve. For additional information see Tips on pages 1-6. Direct Acting Relief Valve Series A2A2 Features Fast response Ideal for controlling ventable relief valves, or for thermal relief Hardened working parts for maximum durability Integral 25 micron inlet filter available All external parts zinc plated Specifications Rated 6 (1.6 GPM) Maximum Inlet H - 1-21 (145-3 ) P - 1-42 (145-6 ) Maximum Setting Maximum Tank 42 (6 ) 42 (6 ) Leakage at 5 drops/min. 15 SSU (32 cst) @1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.11 kg (.24 lbs.) Cavity C8-2 (See Section for more details) Form Tool Rougher None Finisher NFT8-2F Performance Curves ( rise through cartridge only) vs. Inlet Drop 58 4 435 3 29 2 145 1 GPM GPM A2A2H 1.26 vs. Inlet Drop 58 4 435 3 29 2 145 1 A2A2P 1.26 Hydraulic Oil 15 SSU @ 1 F (32 cst) 2.53 2.53 3.79 (Q) 3.79 (Q) 4 1.6 Hydraulic Oil 15 SSU @ 1 F (32 cst) 4 1.6 5 1.32 5 1.32 6 1.59 6 1.59 9

Catalog HY15-351/US Direct Acting Relief Valve Series A2A2 Information Dimensions Millimeters (Inches) 5 AF Hex socket 21.8 (.86) max 23.2 (.91) 17 AF Hex. 12 Nm (9 lb. ft.) 22 AF Hex. 4 Nm (3 lb. ft.) 3/4" - 16 UNF 27.7 (1.9) T P Ordering Information A2A2 8 Size Direct Acting Relief Valve Range Style Optional Setting Seals Filter Body Material Port Size Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () A2A2H 1 (14 ) @.5 (.13 GPM) A2A2P 2 (29 ) @.5 (.13 GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK3515N-1) V Fluorocarbon / (SK3515V-1) Code Filter Omit Omit for no filter (Std.) F 25 micron inlet filter Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-2-*4P) 6P 3/8 NPTF (B8-2-*6P) 4T SAE-4 (B8-2-*4T) 6T SAE-6 (B8-2-*6T) 6B 3/8 BSPG (B8-2-*6B) * Add A for aluminum, omit for steel. 1

Catalog HY15-351/US Information Direct Acting Relief Valve Series A2B2 General Description Direct Acting Poppet-Type Relief Valve. For additional information see Tips on pages 1-6. Features Fast response Excellent stability throughout flow range Virtually leak free Hardened working parts for maximum durability Adjustable, preset and tamper resistant versions available Preset version is tamper resistant and compact All external parts zinc plated Specifications Rated Maximum Inlet 8 (3 GPM) 42 (6 ) Maximum F - 2-1 (29-145 ) Setting H - 5-21 (72-3 ) P - 5-42 (72-6 ) Maximum Tank 42 (6 ) Leakage at 5 drops/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.2 kg (.44 lbs.) Cavity C8-2 (See Section for more details) Form Tool Rougher None Finisher NFT8-2F Performance Curves ( rise through cartridge only) vs. Inlet Drop 29 2175 15 725 2 145 1 GPM 5 5 1.3 5 1.3 Hydraulic Oil 15 SSU @ 1 F (32 cst) A2B2H vs. Inlet Drop 58 4 435 3 29 2 145 1 GPM A2B2P 1 2.6 1 2.6 A2B2F BASIC VALVE PRESSURE DROP 15 4. (Q) 15 4. (Q) 2 5.3 Hydraulic Oil 15 SSU @ 1 F (32 cst) BASIC VALVE PRESSURE DROP 2 5.3 25 6.6 25 6.6 3 7.9 3 7.9 11

Catalog HY15-351/US Direct Acting Relief Valve Series A2B2 Information Dimensions Millimeters (Inches) 5 AF Hex socket 'Z' 2.8 (.82) max 57 (2.24) 'Y' 59. (2.32) max 17 AF Hex. 12 Nm (9 lb. ft.) 22 AF Hex. 4 Nm (3 lb. ft.) 27.7 (1.9) T 3/4" - 16 UNF P Ordering Information A2B2 8 Size Direct Acting Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range F 2-1 (29-145 ) H 5-21 (72-3 ) P 5-42 (72-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Y Non Adjustable Preset Optional Setting Specify setting if required () Y Setting must be specified A2B2F 5 (725 ) @ 2 (.5 GPM) A2B2H 1 (145 ) @ 2 (.5 GPM) A2B2P 2 (29 ) @ 2 (.5 GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK35N-1) V Fluorocarbon / (SK35V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-2-*4P) 6P 3/8 NPTF (B8-2-*6P) 4T SAE-4 (B8-2-*4T) 6T SAE-6 (B8-2-*6T) 6B 3/8 BSPG (B8-2-*6B) * Add A for aluminum, omit for steel. 12

Catalog HY15-351/US Information General Description Direct Acting Poppet-Type Relief Valve. For additional information see Tips on pages 1-6. Direct Acting Relief Valve Series RD12 Features Hardened, precision ground parts for durability Internal mechanical stop limits poppet travel eliminating spring solidification Spherical poppets for low leakage D -Ring eliminates backup rings All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Fast response Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 38 (1 GPM) 25 (36 ) 21 (3 ) 21 (3 ) 85% of crack pressure Leakage at 5 drops/min. (.33 cc/min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range (Ambient) Fluids All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher NFT1-2F Performance Curve vs. Inlet ( rise through cartridge only) 4 3 27 2 138 1 276 69 7.6 15 23 GPM 3 2 4 6 8 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) 13

Catalog HY15-351/US Direct Acting Relief Valve Series RD12 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 78.4 (3.9) 78.4 (3.9) 84.1 (3.31) 81.9 (3.22) 7.3 (2.77) THIRD-ANG PROJECTION Screw/Knob Version 7/8-14 UNF-2A Thread 1" Hex. 5-56 Nm (37-41 lb. ft.) 31.9 (1.26) Ø 15.8 (.62) Fixed Cap/Tamper Resistant Version Non-Adjustable Version 31.9 (1.26) Ordering Information RD12 1 Size Direct Acting Relief Valve Style Code Range 3 6.9-2.7 (1-3 ) 1.3 (15 ) @.95 (.25 GPM) 9 13.8-62.1 (2-9 ) 31. (45 ) @.95 (.25 GPM) 18 2.7-124 (3-18 ) 62.1 (9 ) @.95 (.25 GPM) 3 41.4-27 (6-3 ) 13.4 (15 ) @.95 (.25 GPM) Range Seals Optional Setting Body Material Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit D -Ring / (SK1-2) K Knob Adjust (717784-1) N Nitrile / (SK1-2N) N Non-Adjustable V Fluorocarbon / (SK1-2V) S Screw Adjust T Tamper Resistant Cap (717943) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 3 All settings at.95 (.25 GPM) Port Size Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 14

Catalog HY15-351/US Information Direct Acting Relief Valve Series A4B2 General Description Direct Acting Poppet-Type Relief Valve. For additional information see Tips on pages 1-6. Features Fast response with good stability Virtually leak-free Hardened working parts for maximum durability Adjustable, preset and tamperproof versions available Preset version is tamperproof and compact All external parts zinc plated Specifications Rated 1 (26 GPM) Maximum Inlet H - 5-21 (72-3 ) P - 5-42 (72-6 ) Maximum Setting Maximum Tank 42 (6 ) 42 (6 ) Leakage at 5 drops/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.28 kg (.62 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher NFT1-2F Performance Curves ( rise through cartridge only) vs. Inlet Drop 29 2175 15 725 2 145 1 GPM GPM 5 A4B2H Hydraulic Oil 15 SSU @ 1 F (32 cst) BASIC VALVE PRESSURE DROP 25 6.6 vs. Inlet Drop 58 4 435 3 29 2 145 1 A4B2P 25 6.6 5 13.2 (Q) 5 13.2 (Q) 75 19.8 Hydraulic Oil 15 SSU @ 1 F (32 cst) BASIC VALVE PRESSURE DROP 75 19.8 1 26.4 1 26.4 15

Catalog HY15-351/US Information Direct Acting Relief Valve Series A4B2 Dimensions Millimeters (Inches) 5 AF Hex socket 'Z' 21.8 (.86) max 59 (2.32) 'Y' 61. (2.4) max 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 31.8 (1.25) T 7/8" - 14 UNF P Ordering Information A4B2 1 Size Direct Acting Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range H 5-21 (72-3 ) P 5-42 (72-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Y Non Adjustable Preset Optional Setting Specify setting if required () Y Setting must be specified A4B2H 1 (145 ) @ 15 (4. GPM) A4B2P 2 (29 ) @ 15 (4. GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK353N-1) V Fluorocarbon / (SK353V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 16

Catalog HY15-351/US Information Direct Acting Relief Valve Series A4B2FY*,HY*,PY* General Description Direct Acting Poppet-Type Relief Valve. Equipment Directive (PED 97/23/EC) compliant to hazard category IV. For additional information see Tips on pages 1-6. Features Fast response with good stability Compact space saving design Poppet type construction for lower leakage Full 42 (6 ) pressure capability Hardened working parts for maximum durability Tamperproof setting All external parts zinc plated Specifications Rated 1 (26 GPM) Maximum Inlet FY - 2-1 (29-145 ) HY - 5-21 (72-3 ) PY - 5-42 (72-6 ) Maximum Setting 42 (6 ) Sensitivity: FY - 11 (165 ) /Turn HY - 21 (35 ) PY - 44 (63 ) Leakage at 5 drops/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.25 kg (.55 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher NFT1-2F Performance Curves ( rise through cartridge only) vs. Inlet Drop 29 2175 15 725 2 145 1 GPM 5 Hydraulic Oil 15 SSU @ 1 F (32 cst) A4B2F & A4B2H 25 6.6 vs. Inlet Drop 58 GPM 4 435 3 29 2 145 1 A4B2P 25 6.6 5 13.2 (Q) 5 13.2 (Q) A4B2H A4B2H A4B2F 75 19.8 Hydraulic Oil 15 SSU @ 1 F (32 cst) 75 19.8 1 26.4 1 26.4 17

Catalog HY15-351/US Direct Acting Relief Valve Series A4B2FY*,HY*,PY* Information Dimensions Millimeters (Inches) 2. (.8) max 59 (2.32) 26 AF Hex. 5 Nm (37 lb. ft.) 31.8 (1.25) T 7/8" - 14 UNF P Ordering Information A4B2 Y 1 Size Direct Acting Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range F 2-1 (29-145 ) H 5-21 (72-3 ) P 5-42 (72-6 ) Code Style / Kit No. Y Non Adjustable Preset (Std.) Optional Setting Setting must be specified () Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK353NP-1) V Fluorocarbon / (SK353VP-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 18

Catalog HY15-351/US Information General Description Direct Acting Spool-Type Relief Valve. For additional information see Tips on pages 1-6. Direct Acting Relief Valve Series A4C2 Features High flow capacity Fast response with good stability Low pressure setting Full 42 6 tank line back pressure Hardened working parts for maximum durability Adjustable, preset and tamperproof versions available All external parts zinc plated Specifications Rated 2 (53 GPM) Maximum Inlet D - 2-5 (29-725 ) F - 2-1 (29-145 ) Performance Curve ( rise through cartridge only) vs. Inlet 29 2 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting Maximum Tank 42 (6 ) 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 5 (725 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.28 kg (.62 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher NFT1-2F Drop 2175 15 145 1 725 GPM 5 5 13.2 A4C2F A4C2D BASIC VALVE PRESSURE DROP 1 26.4 (Q) A4C2F A4C2D 15 39.6 2 52.8 19

Catalog HY15-351/US Direct Acting Relief Valve Series A4C2 Information Dimensions Millimeters (Inches) 5 AF Hex socket 22 (.87) max 59 (2.32) 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 31.8 (1.25) T 7/8" - 14 UNF P Ordering Information A4C2 1 Size Direct Acting Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range D 2-5 (29-725 ) F 2-1 (29-145 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () A4C2D 25 (36 ) @ 15 (4. GPM) A4C2F 5 (725 ) @ 15 (4. GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK353N-1) V Fluorocarbon / (SK353V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 2

Catalog HY15-351/US Information General Description Differential Area Relief Valve. For additional information see Tips on pages 1-6. Differential Area Relief Valve Series RDH83 Features Hardened, precision ground parts for durability Spherical poppets for low leakage High flow capacity Internal mechanical stop limits poppet travel eliminating spring solidification All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 53 (14 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 85% of crack pressure Leakage at 5 drops/min. (.33 cc/min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.19 kg (.43 lbs.) Cavity C8-2 (See Section for more details) Form Tool Rougher None Finisher NFT8-2F Performance Curve vs. Inlet ( rise through cartridge only), 6 5 345 3 27 2 138 1 414 4 276 69 8 15 23 3 38 45 GPM 53 2 4 6 8 1 12 14 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) 21

Catalog HY15-351/US Differential Area Relief Valve Series RDH83 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 73.3 (2.9) 73.3 (2.9) 78.4 (3.9) 76.1 (2.99) 62. (2.44) 3/4-16 UNF-2A Thread 7/8" Hex. 43-49 Nm (32-36 lb. ft.) 27.2 (1.7) 27.2 (1.7) Ø 12.6 (.5) THIRD-ANG PROJECTION Screw/Knob Version Fixed Cap/Tamper Resistant Version Non-Adjustable Version Ordering Information RDH83 8 Size Differential Area Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit D -Ring / (SK8-2) K Knob Adjust (717784-1) N Nitrile / (SK8-2N) N Non-Adjustable V Fluorocarbon / (SK8-2V) S Screw Adjust T Tamper Resistant Cap (71883) Optional Setting Code Range 15 6.9-13 (1-15 ) 51.7 (75 ) @ crack pressure approximately.95 (.25 GPM) 3 17.2-27 (25-3 ) 13 (15 ) @ crack pressure approximately.95 (.25 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @ crack pressure approximately.95 (.25 GPM) 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-2-*4P) 6P 3/8 NPTF (B8-2-*6P) 4T SAE-4 (B8-2-*4T) 6T SAE-6 (B8-2-*6T) 6B 3/8 BSPG (B8-2-*6B) * Add A for aluminum, omit for steel. 22

Catalog HY15-351/US Information General Description Differential Area Relief Valve. For additional information see Tips on pages 1-6. Differential Area Relief Valve Series RDH13 Features Hardened, precision ground parts for durability Internal mechanical stop limits poppet travel eliminating spring solidification Spherical poppets for low leakage D -Ring eliminates backup rings All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. High flow capacity Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 75 (2 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 85% of crack pressure Leakage at 5 drops/min. (.33 cc/min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher NFT1-2F Performance Curve vs. Inlet ( rise through cartridge only) 6 5 345 2 138 1 414 4 276 3 27 69 Hydraulic Oil 15 SSU @ 1 F (32 cst) 15.1 3.3 45.4 GPM 6.6 4 8 12 16 (Q) 75.7 2 23

Catalog HY15-351/US Differential Area Relief Valve Series RDH13 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 78.4 (3.9) 78.4 (3.9) 84.1 (3.31) 81.9 (3.22) 7.3 (2.77) 7/8-14 UNF-2A Thread 1" Hex. 69-75 Nm (51-55 lb. ft.) 31.9 (1.26) 31.9 (1.26) THIRD-ANG PROJECTION Screw/Knob Version Ø 15.8 (.62) Fixed Cap/Tamper Resistant Version Non-Adjustable Version Ordering Information RDH13 1 Size Differential Area Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit D -Ring / (SK1-2) K Knob Adjust (717784-1) N Nitrile / (SK1-2N) N Non-Adjustable V Fluorocarbon / (SK1-2V) S Screw Adjust T Tamper Resistant Cap (717943) Optional Setting Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @.95 (.25 GPM) 2 34.5-138 (5-2 ) 69 (1 ) @.95 (.25 GPM) 3 34.5-27 (5-3 ) 13.5 (15 ) @.95 (.25 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @.95 (.25 GPM) 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at.95 (.25 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 24

Catalog HY15-351/US Information General Description Differential Area Relief Valve. For additional information see Tips on pages 1-6. Differential Area Relief Valve Series RD163 Features Hardened, precision ground parts for durability Compact size for reduced space requirements Low leakage design Fast response All external parts zinc plated Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 151 (4 GPM) 24 (35 ) 21 (3 ) 21 (3 ) 8% of crack pressure Leakage at 1 drops/min. (.66 cc/min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C16-2 (See Section for more details) Form Tool Rougher None Finisher NFT16-2F Tank Performance Curve vs. Inlet ( rise through cartridge only) 4 2 138 1 276 3 27 69 Hydraulic Oil 15 SSU @ 1 F (32 cst) 38 76 114 GPM 152 1 2 3 4 (Q) 25

Catalog HY15-351/US Differential Area Relief Valve Series RD163 Information Dimensions Millimeters (Inches) Ø 38.1 (1.5) Knob 97. (3.82) Max. 78. (3.7) 1-1/2" Hex. 54 Nm (4 lb. ft.) 1. (3.94) 1-5/16-12 UNF-2A Thread 45.8 (1.8) Ø 28.5 (1.12) In Out THIRD-ANG PROJECTION Screw/Knob Version Tamper Resistant Version Ordering Information RD163 16 Size Differential Area Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. K Knob Adjust (8428K) S Screw Adjust T Tamper Resistant Cap (717783) Code Range 1 13.8-69 (2-1 ) 34.5 (5 ) @ 11.3 (3 GPM) 2 27.6-138 (4-2 ) 69 (1 ) @ 11.3 (3 GPM) 3 41.4-27 (6-3 ) 13.5 (15 ) @ 11.3 (3 GPM) Code Seals / Kit No. Omit Nitrile / (SK16-2) V Fluorocarbon / (SK16-2V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 3 All settings at 11.3 (3 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 12P 3/4 NPTF (B16-2-*12P) 16P 1 NPTF (B16-2-*16P) 8T SAE-8 (B16-2-*8T) 12T SAE-12 (B16-2-*12T) 16T SAE-16 (B16-2-*16T) 12B 3/4 BSPG (B16-2-12B) 16B 1 BSPG (B16-2-*16B) * Add A for aluminum, omit for steel. Steel body only. 26

Catalog HY15-351/US Information General Description Pilot Operated Spool-Type Relief Valve. For additional information see Tips on pages 1-6. Pilot Operated Relief Valve Series RAH81 Features Hardened, precision ground parts for durability Low profile adapter for minimal space requirements Fully guided pilot for more consistent reseat Steel adapters are coated with yellow zinc dichromate for protection from salt spray Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Internal screening protects pilot spring from debris Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 75.8 (2 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 9% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.9 kg (.2 lbs.) Cavity C8-2 (See Section for more details) Form Tool Rougher None Finisher NFT8-2F Performance Curves vs. Inlet ( rise through cartridge only),, 6 5 345 2 138 1 414 4 276 3 27 4 3 2 1 69 Hydraulic Oil 15 SSU @ 1 F (32 cst) 15 3 45 GPM 61 4 8 12 16 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) 28 RAH81S1 (minimum setting) 21 14 7 15 3 45 GPM 61 4 8 12 16 (Q) 76 2 76 2 27

Catalog HY15-351/US Pilot Operated Relief Valve Series RAH81 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 36.6 (1.44) 36.6 (1.44) 44.7 (1.76) 42.4 (1.67) 3/4-16 UNF-2A Thread 7/8" Hex. 43-49 Nm (32-36 lb. ft.) 27.2 (1.7) Screw/Knob Version 12.6 (.5) Fixed Cap/Tamper Resistant Version THIRD-ANG PROJECTION Ordering Information RAH81 8 Size Pilot Operated Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (717943) Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ crack pressure, approximately.95 (.25 GPM) 2 6.9-138 (1-2 ) 69 (1 ) @ crack pressure, approximately.95 (.25 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ crack pressure, approximately.95 (.25 GPM) 5 13.8-345 (2-5 ) 172.4 (25 ) @ crack pressure, approximately.95 (.25 GPM) Code Seals / Kit No. Omit D -Ring / (SK8-2) N Nitrile / (SK8-2N) V Fluorocarbon / (SK8-2V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-2-*4P) 6P 3/8 NPTF (B8-2-*6P) 4T SAE-4 (B8-2-*4T) 6T SAE-6 (B8-2-*6T) 6B 3/8 BSPG (B8-2-*6B) * Add A for aluminum, omit for steel. 28

Catalog HY15-351/US Information General Description Pilot Operated Spool-Type Relief Valve. For addition information see Tips on pages 1-6. Pilot Operated Relief Valve Series RAH11 Features Hardened, precision ground parts for durability Low profile adapter for minimal space requirements Fully guided poppet for more consistent reseat Steel adapters are coated with yellow zinc dichromate for protection from salt spray Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Internal screening protects pilot spring from debris Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 113 (3 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 9% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher NFT1-2F Performance Curves vs. Inlet ( rise through cartridge only),, 6 5 345 2 138 1 414 4 276 3 27 4 3 2 1 69 Hydraulic Oil 15 SSU @ 1 F (32 cst) 22.7 45.3 68.1 GPM 9.8 6 12 18 24 (Q) 27.6 2.7 13.8 6.9 Hydraulic Oil 15 SSU @ 1 F (32 cst) RAH11S1 (minimum setting) 22.7 45.3 68.1 GPM 9.8 6 12 18 24 (Q) 113.6 3 113.6 3 29

Catalog HY15-351/US Pilot Operated Relief Valve Series RAH11 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 34.2 (1.35) 34.2 (1.35) 44.1 (1.74) 41.9 (1.65) 7/8-14 UNF-2A Thread 1" Hex. 69-75 Nm (51-55 lb. ft.) 31.7 (1.25) Ø 15.8 (.62) Screw/Knob Version Fixed Cap/Tamper Resistant Version THIRD-ANG PROJECTION Ordering Information RAH11 1 Size Pilot Operated Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (12547) Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ crack pressure, approximately.95 (.25 GPM) 2 6.9-138 (1-2 ) 69 (1 ) @ crack pressure, approximately.95 (.25 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ crack pressure, approximately.95 (.25 GPM) 5 13.8-345 (2-5 ) 172.4 (25 ) @ crack pressure, approximately.95 (.25 GPM) Code Seals / Kit No. Omit D -Ring / (SK1-2) N Nitrile / (SK1-2N) V Fluorocarbon / (SK1-2V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 3

Catalog HY15-351/US Information General Description Pilot Operated Spool-Type Relief Valve. For additional information see Tips on pages 1-6. Features Low override curve Ball-type pilot for added stability High accuracy - pilot operated design Hardened, precision ground parts for durability Compact size for reduced space requirements All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Pilot Operated Relief Valve Series RAH161 Tank In Out Specifications Maximum Maximum Inlet Maximum Setting Maximum Tank Reseat 32.8 (8 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 8% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @ 75% of crack pressure Cartridge Material Operating Temp. Range (Ambient) Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.9 kg (2. lbs.) Cavity C16-2 (See Section for more details) Form Tool Rougher None Finisher NFT16-2F Performance Curve vs. Inlet ( rise through cartridge only) 6 5 345 2 138 1 414 4 276 3 27 69 Hydraulic Oil 15 SSU @ 1 F (32 cst) 75.8 151.6 GPM 227.4 2 4 6 (Q) 33.2 8 31

Catalog HY15-351/US Pilot Operated Relief Valve Series RAH161 Information Dimensions Millimeters (Inches) 38.1 (1.5) Dia. Knob 36.4 (1.43) 36.9 (1.45) 39.5 (1.55) 38.8 (1.53) 44.5 (1.75) Tank 1-5/16-12 UN-2A Thread 1-1/2" Hex. 76 Nm (56 lb. ft.) Ø 28.5 (1.12) THIRD-ANG PROJECTION Screw/Knob Version Fixed Cap/Tamper Resistant Version Ordering Information RAH161 16 Size Pilot Operated Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit Nitrile / (SK16-2) K Knob Adjust (717784-15) V Fluorocarbon / (SK16-2V) S Screw Adjust T Tamper Resistant Cap (717785) Optional Setting Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ 37.5 (1 GPM) 2 13.8-138 (2-2 ) 69 (1 ) @ 37.5 (1 GPM) 3 2.7-27 (3-3 ) 13.5 (15 ) @ 37.5 (1 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @ 37.5 (1 GPM) 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at 37.5 (1 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Omit Cartridge Only Body Part No. 12P 3/4 NPTF (B16-2-*12P) 16P 1 NPTF (B16-2-*16P) 8T SAE-8 (B16-2-*8T) 12T SAE-12 (B16-2-*12T) 16T SAE-16 (B16-2-*16T) 12B 3/4 BSPG (B16-2-12B) 16B 1 BSPG (B16-2-*16B) * Add A for aluminum, omit for steel. Steel body only. 32

Catalog HY15-351/US Information General Description Pilot Operated, Spool-Type Relief Valve. For additional information see Tips on pages 1-6. Pilot Operated Relief Valve Series A6G2 Features Very high flow capacity Minimal pressure variation with flow change Full tank line back pressure capability, ideal for crossline relief applications Integral 25 micron pilot flow filter Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated Specifications Rated 4 (16 GPM) Maximum Inlet H - 1-21 (145-3 ) P - 1-42 (145-6 ) Performance Curve ( rise through cartridge only) vs. Inlet 58 4 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting Maximum Tank 42 (6 ) 42 (6 ) Leakage at 1 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.57 kg (1.26 lbs.) Cavity C16-2 (See Section for more details) Form Tool Rougher None Finisher NFT16-2F Drop 435 3 29 2 145 1 GPM BASIC VALVE PRESSURE DROP 1 26.4 2 52.8 (Q) 3 79.3 4 15.7 33

Catalog HY15-351/US Pilot Operated Relief Valve Series A6G2 Information Dimensions Millimeters (Inches) 5 AF Hex socket 22 (.87) max 43.2 (1.7) 17 AF Hex. 12 Nm (9 lb. ft.) 38 AF Hex. 1 Nm (74 lb. ft.) 1-5/16" - 12 UNF 44.5 (1.75) T P Ordering Information A6G2 16 Size Pilot Operated Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () A6G2H 1 (145 ) @ 15 (4. GPM) A6G2P 2 (29 ) @ 15 (4. GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK357N-1) V Fluorocarbon / (SK357V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 12P 3/4 NPTF (B16-2-*12P) 16P 1 NPTF (B16-2-*16P) 8T SAE-8 (B16-2-*8T) 12T SAE-12 (B16-2-*12T) 16T SAE-16 (B16-2-*16T) 12B 3/4 BSPG (B16-2-12B) 16B 1 BSPG (B16-2-*16B) * Add A for aluminum, omit for steel. Steel body only. 34

Catalog HY15-351/US Information General Description Pilot Operated Spool-Type Relief Valve. For additional information see Tips on pages 1-6. Pilot Operated Relief Valve Series RAH21 Features Low override curve Ball-type pilot for added stability High accuracy - pilot operated design Hardened, precision ground parts for durability Compact size for reduced space requirements All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. In Out Tank Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 379 (1 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 8% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.9 kg (2. lbs.) Cavity C2-2 (See Section for more details) Form Tool Rougher None Finisher NFT2-2F Performance Curve vs. Inlet ( rise through cartridge only) 6 5 345 2 138 1 414 4 276 3 27 69 Hydraulic Oil 15 SSU @ 1 F (32 cst) 76 151 227 GPM 33 2 4 6 8 (Q) 379 1 35

Catalog HY15-351/US Pilot Operated Relief Valve Series RAH21 Information Dimensions Millimeters (Inches) 35.6 (1.4) Tank 38.1 (1.5) Dia. Knob 36.6 (1.44) 1-5/8-12 UN-2A Thread 39.1 (1.54) 1-7/8" Hex. 133 Nm (98 lb. ft.) 38.5 (1.52) 36.4 (1.44) Screw/Knob Version Fixed Cap/Tamper Resistant Version THIRD-ANG PROJECTION Ordering Information RAH21 2 Size Pilot Operated Relief Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit Nitrile / (SK2-2) K Knob Adjust (717784-15) V Fluorocarbon / (SK2-2V) S Screw Adjust T Tamper Resistant Cap (717785) Optional Setting Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ 37.5 (1 GPM) 2 13.8-138 (2-2 ) 69 (1 ) @ 37.5 (1 GPM) 3 2.7-27 (3-3 ) 13.5 (15 ) @ 37.5 (1 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @ 37.5 (1 GPM) 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at 37.5 (1 GPM) Code Body Material Omit Steel Code Port Size Body Part No. Omit Cartridge Only 2T SAE-2 (B2-2-2T) 2B 1-1/4 BSPG (B2-2-2B) 36

Catalog HY15-351/US Information General Description Kick-Down, Pilot Operated Relief Valve. For additional information see Tips on pages 1-6. P.O., Spool Type, Kick-Down Valve Series A4K2 Features High flow capacity Integral 25 micron pilot flow filter Hardened working parts for maximum durability Adjustable and tamper resistant versions available All external parts zinc plated Specifications Rated Maximum Inlet 16 (42 GPM) 42 (6 ) Maximum H - 1-21 (145-3 ) Setting P - 1-42 (144-6 ) Maximum Tank 42 (6 ) Sensitivity: H - 3 (435 ) /Turn P - 55 (8 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 5 (725 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.29 kg (.64 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher Performance Curve ( rise through cartridge only) Drop vs. Drop 29 218 145 73 GPM 2 15 1 5 4 1.6 Application Note Valve unloads completely when setting is reached and resets when fluid supply is removed. 8 21.1 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) 12 31.7 16 42.3 37

Catalog HY15-351/US P.O., Spool Type, Kick-Down Valve Series A4K2 Information Dimensions Millimeters (Inches) 5 AF Hex socket 21.8 (.86) max 39.5 (1.56) 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 31.8 (1.25) 7/8" - 14 UNF Ordering Information A4K2 1 Size Kick-Down Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () A4K2H 1 (145 ) A4K2P 2 (29 ) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK353N-1) V Fluorocarbon / (SK353V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 38

Catalog HY15-351/US Information General Description Ventable Pilot Operated Spool-Type Relief Valve. This valve controls pressure via the internal spring chamber or via an external vent line. For addition information see Tips on pages 1-6. Ventable Pilot Operated Relief Valve Series RAH11V Features Low override curve Ball-type pilot for added stability High accuracy - pilot operated design Hardened, precision ground parts for durability Compact size for reduced space requirements All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Outlet Vent Inlet Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Reseat 68 (18 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 8% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @75% of crack pressure Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NFT1-3R Finisher NFT1-3F Performance Curves vs. Inlet ( rise through cartridge only) 6 5 345 2 138 1 414 4 276 3 27 69 Hydraulic Oil 135 SSU @ 1 F (28 cst) 11.4 22.7 34.1 45.4 GPM 56.8 3 6 9 12 15 (Q) 68.1 18 39

Catalog HY15-351/US Information Dimensions Millimeters (Inches) Ventable Pilot Operated Relief Valve Series RAH11V 25.4 (1.) Dia. Knob 33.5 (1.32) 35.5 (1.4) 37.1 (1.46) 36.4 (1.44) Outlet Vent 7/8 14UNF-2A Thread 1" Hex. 65 Nm (48 lb. ft.) 46.2 (1.82) Inlet Ø 15.8 (.62) Ø 17.4 (.68) THIRD-ANG PROJECTION Screw/Knob Version Fixed Cap/Tamper Resistant Version Ordering Information RAH11V 1 Size Ventable Pilot Operated Relief Valve Style Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (717785) Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ 11.3 (3 GPM) 2 13.8-138 (2-2 ) 69 (1 ) @ 11.3 (3 GPM) 3 2.7-27 (3-3 ) 13.5 (15 ) @ 11.3 (3 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @ 11.3 (3 GPM) Range Seals Optional Setting Body Material Code Seals / Kit No. Omit D -Ring / (SK1-3) N Nitrile / (SK1-3N) V Fluorocarbon / (SK1-3V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at 11.3 (3 GPM) Port Size Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 4B 1/4 BSPG (B1-3-4B) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8B) * Add A for aluminum, omit for steel. Steel body only. 4

Catalog HY15-351/US Information Pilot Operated, Ventable Relief Valve Series A4H3 General Description Pilot Operated, Spool-Type, Ventable Relief Valve. For additional information see Tips on pages 1-6. Features High flow capacity Full tank line back pressure capability Excellent flow pressure characteristics for consistent pressure setting Ideal for pump relief and remote control or unloading via vent (port 3) Integral 25 micron pilot flow filter Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated Specifications Rated 19 (5 GPM) Maximum Inlet H - 1-21 (145-3 ) P - 1-42 (145-6 ) Performance Curves ( rise through cartridge only) vs. Inlet 1 to 2 58 4 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting Maximum Tank 42 (6 ) 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight Cavity.25 kg (.55 lbs.) C1-3S (See Section for more details) Form Tool Rougher None Finisher Drop 435 3 29 2 145 1 GPM 5 13.2 1 26.4 (Q) Vented Open Drop 1 to 2 Drop 29 218 145 73 GPM 2 15 1 5 5 13.2 1 26.4 (Q) 15 39.6 Hydraulic Oil 15 SSU @ 1 F (32 cst) 15 39.6 2 52.8 2 52.8 41

Catalog HY15-351/US Pilot Operated, Ventable Relief Valve Series A4H3 Information Dimensions Millimeters (Inches) 22 (.87) max 39.5 (1.56) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 47 (1.85) V T 7/8" - 14 UNF P Ordering Information A4H3 1 Size Pilot Operated Relief Valve Range Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Style Optional Setting Seals Optional Setting Specify setting if required () A4H3H 1 (145 ) @ 15 (4. GPM) A4H3P 2 (29 ) @ 15 (4. GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK354N-1) V Fluorocarbon / (SK354V-1) Order Bodies Separately LB1 Line Body Porting Code Porting 71 5/8 SAE (main) 3/8 SAE (aux) 711 3/4 BSP (main) 1/4 BSP (aux) Code Body Material A Aluminum S Steel Body Material 42

Catalog HY15-351/US Information Pilot Operated, Ventable Relief Valve Series A6H3 General Description Pilot Operated, Spool-Type, Ventable Relief Valve. For additional information see Tips on pages 1-6. Features High flow capacity Full tank line back pressure Excellent pressure flow characteristics Ideal for pump relief and remote control or unloading via vent (port 3) Integral 25 micron pilot flow filter Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated Specifications Rated 4 (16 GPM) Maximum Inlet H - 1-21 (145-3 ) P - 1-42 (145-6 ) Performance Curves ( rise through cartridge only) vs. Inlet 1 to 2 58 4 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting Maximum Tank 42 (6 ) 42 (6 ) Leakage at 1ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight Cavity.58 kg (1.28 lbs.) C16-3S (See Section for more details) Form Tool Rougher None Finisher Drop Drop 435 3 29 2 145 1 GPM 29 218 73 GPM 2 15 1 5 1 26.4 1 26.4 2 52.8 (Q) Vented Open Drop 1 to 2 145 2 52.8 (Q) 3 79.2 Hydraulic Oil 15 SSU @ 1 F (32 cst) 3 79.3 4 15.6 4 15.7 43

Catalog HY15-351/US Pilot Operated, Ventable Relief Valve Series A6H3 Information Dimensions Millimeters (Inches) 22 (.87) max 43 (1.69) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 38 AF Hex. 1 Nm (74 lb. ft.) 55.25 (2.18) V T 1-5/16" - 12 UNF P Ordering Information A6H3 16 Size Pilot Operated Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () A6H3H 1 (145 ) @ 15 (4. GPM) A6H3P 2 (29 ) @ 15 (4. GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK358N-1) V Fluorocarbon / (SK358V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 16T SAE-16 (B16-3S-*16T) 16B 1 BSPG (B16-3S-*16B) * Add A for aluminum, omit for steel. 44

Catalog HY15-351/US Information Direct Acting, Cross-over Relief Valve Series A4J2 General Description Direct Acting, Dual Poppet-Type, Cross-over Relief Valve. For additional information see Tips on pages 1-6. Features Compact space saving design Cost effective - only requires one cavity Poppet-type construction for lower leakage Full 35, 5 pressure capability High flow capability for the size of valve Minimal pressure variation with flow change Hardened working parts for maximum durability Adjustable and tamperproof versions available Available as marked valve in compliance with Equipment Directive All external parts zinc plated Specifications Rated 12 (32 GPM) Maximum Inlet H - 5-21 (72-3 ) M - 1-35 (144-5 ) Maximum 42 (6 ) Setting Maximum Tank 42 (6 ) Leakage at 1 drops/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material All parts steel. All operating parts hardened steel. Operating Temp. -4 C to +93.3 C (Nitrile) Range/Seals (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Fluid Mineral-based or synthetic with Compatibility/ lubricating properties at viscosities Viscosity of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.29 kg (.64 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher Application Performance Curves ( rise through cartridge only) vs. Inlet 1 to 2 and 2 to 1 Drop 435 3 29 2 145 1 GPM A4J2H 3 7.9 6 15.9 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) vs. Inlet 1 to 2 and 2 to 1 Drop 58 4 435 3 29 2 145 1 A4J2M 9 23.8 Hydraulic Oil 15 SSU @ 1 F (32 cst) 12 31.8 Motor protection in both directions GPM 3 7.9 6 15.9 (Q) 9 23.8 12 31.8 45

Catalog HY15-351/US Direct Acting, Cross-over Relief Valve Series A4J2 Information Dimensions Millimeters (Inches) 5 AF Hex socket Spot Face Datum 22 (.87) max 59. (2.32) 31.8 (1.25) P or T 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 7/8" - 14 UNF P or T Ordering Information A4J2 1 Size Direct Acting Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range H 5-21 (72-3 ) M 1-35 (144-5 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () A4J2H 1 (145 ) @ 15 (4. GPM) A4J2M 2 (29 ) @ 15 (4. GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK3529N-1) V Fluorocarbon / (SK3529V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 46

Catalog HY15-351/US Information Direct Acting, Crossover Relief Valve Series A4J2HY*, A4J2MY* General Description Direct Acting Poppet-Type Relief Valve. Equipment Directive (PED 97/23/EC) compliant to hazard category IV. For additional information see Tips on pages 1-6. Features Bi-directional flow design for installation flexibility and security Compact space saving design Poppet type construction for lower leakage Full 35 (5 ) pressure capability High flow compatibility for the size of valve Minimal pressure variation with flow change Hardened working parts for maximum durability Tamperproof setting All external parts zinc plated Specifications Rated Maximum Inlet 12 (32 GPM) 35 (5 ) Maximum HY - 5-21 (72-3 ) Setting MY - 1-35 (145-5 ) Sensitivity: HY - 25 (362 ) /Turn MY - 34 (493 ) Leakage at 1 drops/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.29 kg (.64 lbs.) Cavity C1-2 (See Section for more details) Form Tool Rougher None Finisher NFT1-2F Performance Curves ( rise through cartridge only) vs. Inlet 1 to 2 and 2 to 1 Drop 435 3 29 2 145 1 GPM GPM A4J2H 3 7.9 6 15.9 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) vs. Inlet 1 to 2 and 2 to 1 Drop 58 4 435 3 29 2 145 1 A4J2M 3 7.9 6 15.9 (Q) 9 23.8 Hydraulic Oil 15 SSU @ 1 F (32 cst) 9 23.8 12 31.8 12 31.8 47

Catalog HY15-351/US Direct Acting, Crossover Relief Valve Series A4J2HY*, A4J2MY* Information Dimensions Millimeters (Inches) 2. (.8) max 59 (2.32) 26 AF Hex. 5 Nm (37 lb. ft.) 31.8 (1.25) Spot Face Datum 7/8" - 14 UNF Ordering Information A4J2 Y 1 Size Direct Acting Relief Valve Range Style Optional Setting Seals Suffix Number Body Material Port Size Code Range H 5-21 (72-3 ) M 1-35 (145-5 ) Code Style / Kit No. Y Non Adjustable Preset (Std.) Optional Setting Setting must be specified () Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK3529N-1) V Fluorocarbon / (SK3529V-1) Code Suffix Number Omit Omit for valve to be set side to nose (2 to 1) 58 For valve to be set nose to side (1 to 2) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum, omit for steel. Steel body only. 48

Catalog HY15-351/US Information General Description Differential Area Unloading Relief Valve. This valve is best suited for low flow accumulator unloading circuits or can be used as remote pilot valves. They provide a fixed percentage between load and unload pressures. For additional information see Tips on pages 1-6. Features Specifications Rated Maximum Pilot Maximum Inlet Maximum Setting Maximum Tank Leakage at 15 SSU (32 cst) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity 3.75 (1 GPM).94 (.25 GPM) 245 (35 ) 21 (3 ) 21 (3 ) 1 drops/min. (66 cc/min.) All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NFT1-3R Finisher NFT1-3F Differential Area Unloading Relief Valve Series RU11 Low hysteresis Cartridge design All external parts zinc plated Tank Pilot Performance Curve Inlet vs. Drop Without pilot assist (Through cartridge only) Drop ( P) 1 75 5 25 6.9 5.2 3.5 1.7 Hydraulic Oil 15 SSU @ 1 F (32 cst).9 1.9 2.8 GPM 3.8.25.5.75 1 (Q) 49

Catalog HY15-351/US Differential Area Unloading Relief Valve Series RU11 Information Dimensions Millimeters (Inches) Identify Valve Per Spec. W-39 43.2 (1.7) 57.9 (2.28) 1" Hex. 22 Nm (16 lb. ft.) 59.1 (2.33) 7/8-14 UNC-2A Thread 47.2 (1.86) Tank Inlet 46.5 (1.83) Ø 15.8 (.62) Ø 17.4 (.68) Screw/Knob Version Pilot Fixed Cap Version THIRD-ANG PROJECTION Ordering Information RU11 C 1 Size Differential Area Unloading Relief Valve Style Range Reload Optional Setting Seals Body Material Port Size Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (8428K) S Screw Adjust Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ 1.1 (.3 GPM) 2 1.3-138 (15-2 ) 69 (1 ) @ 1.1 (.3 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ 1.1 (.3 GPM) Code Reload C 8% ±5% of Setting Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 3 All settings at 1.1 (.3 GPM) Code Seals / Kit No. Omit Nitrile / (SK1-3N) V Fluorocarbon / (SK1-3V) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8B) * Add A for aluminum, omit for steel. Steel body only. 5

Catalog HY15-351/US Information General Description Direct Acting, Spool-Type, Unloading Relief Valve with Internal Pilot. For additional information see Tips on pages 1-6. Direct Acting, Unloading Pilot Relief Valve Series M4A4J Features Use to unload a load sense pump in an accumulator circuit One size unloading valve for all flow size applications Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated (4) (4) Specifications Rated Maximum Inlet 2 (.53 GPM) 42 (6 ) Performance Curve Accumulator Circuit Unload ACCUMULATOR PRESSURE SCAN Maximum Setting Maximum Tank 2 (29 ) 42 (6 ) Reload Leakage at 25 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.33 kg (.73 lbs.) Cavity C1-4 (See Section for more details) Form Tool Rougher None Finisher Application PUMP PRESSURE Time 51

Catalog HY15-351/US Direct Acting, Unloading Pilot Relief Valve Series M4A4J Information Dimensions Millimeters (Inches) 22 (.87) max 5 AF Hex socket 59. (2.32) 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) (4) 7/8" - 14 UNF 64.8 (2.55) Ordering Information M4A4 J 1 Size Direct Acting Unloading Relief Valve Reload Range Style Reload Setting Seals Body Material Port Size Code Reload Range J 5-2 (725-29 ) Code Style / Kit No. Z Screw Adjust (Std.) T Tamper Resistant Cap (TC113) Code Reload Setting Omit Omit for standard setting Specify setting if required M4A4J 125 (185 ) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK353N-1) V Fluorocarbon / (SK353V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-2-*4P) 6P 3/8 NPTF (B1-2-*6P) 8P 1/2 NPTF (B1-2-*8P) 6T SAE-6 (B1-2-*6T) T6T SAE-6 (B1-2-T6T) 8T SAE-8 (B1-2-*8T) T8T SAE-8 (B1-2-T8T) 6B 3/8 BSPG (B1-2-6B) * Add A for aluminum. omit for steel. Steel body only. 52

Catalog HY15-351/US Information Pilot Operated Relief Valve Series A6P2 General Description Pilot Operated, Poppet-Type Relief Valve with Free Reverse. For additional information see Tips on pages 1-6. Features High flow capacity Virtually leak free, can be used for load holding applications Compact space saving design Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated Specifications Rated Maximum Inlet 2 (53 GPM) 42 (6 ) Performance Curves ( rise through cartridge only) Relief Performance 1 to 2 58 4 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum H - 1-21 (145-3 ) Setting P - 1-42 (145-6 ) Maximum Tank 42 (6 ) Leakage at 5 drops/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.57 kg (1.26 lbs.) Cavity C16-2 (See Section for more details) Form Tool Rougher None Finisher NFT16-2F Drop 435 3 29 2 145 1 GPM 1 26.4 1 26.4 2 52.8 (Q) Drop vs. 2 to 1 Drop 29 218 145 73 GPM 2 15 1 5 2 52.8 (Q) 3 79.2 Hydraulic Oil 15 SSU @ 1 F (32 cst) 3 79.3 4 15.6 4 15.7 53

Catalog HY15-351/US Pilot Operated Relief Valve Series A6P2 Information Dimensions Millimeters (Inches) 22 (.87) max 5 AF Hex socket 43 (1.69) 17 AF Hex. 12 Nm (9 lb. ft.) 38 AF Hex. 1 Nm (74 lb. ft.) 55.25 (2.18) P or T 1-5/16" - 12 UNF P or T Ordering Information A6P2 16 Size Pilot Operated Relief Valve Range Style Optional Setting Seals Body Material Port Size Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () A6P2H 1 (145 ) @ 2 (5.3 GPM) A6P2P 2 (29 ) @ 2 (5.3 GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK357N-1) V Fluorocarbon / (SK357V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 12P 3/4 NPTF (B16-2-*12P) 16P 1 NPTF (B16-2-*16P) 8T SAE-8 (B16-2-*8T) 12T SAE-12 (B16-2-*12T) 16T SAE-16 (B16-2-*16T) 12B 3/4 BSPG (B16-2-12B) 16B 1 BSPG (B16-2-*16B) * Add A for aluminum, omit for steel. Steel body only. 54

Catalog HY15-351/US Information General Description Pilot Operated Sequence Valve (Internally Piloted, Externally Vented). For additional information see Tips on pages 1-6. Features Hardened, precision ground parts for durability Low profile adapter for minimal space requirements Fully guided pilot for more consistent reseat Steel adapters are coated with yellow zinc dichromate for protection from salt spray Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Maximum Drain Reseat 45 (12 GPM) 38 (55 ) 35 (5 ) 35 (5 ).56 (.15 GPM) 9% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @ 21 (3 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.11 kg (.25 lbs.) Cavity C8-3 (See Section for more details) Form Tool Rougher NTF8-3R Finisher NFT8-3F P.O. Sequence Valve (Internal Pilot) Series H81 Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Internal screening protects pilot spring from debris Performance Curves vs. Inlet ( rise through cartridge only),, 6 5 345 2 138 1 414 4 276 3 27 4 3 2 1 69 11 23 GPM 34 3 6 9 (Q) 27.6 2.7 13.8 6.9 Hydraulic Oil 15 SSU @ 1 F (32 cst) Hydraulic Oil 15 SSU @ 1 F (32 cst) H81S1 (minimum setting) 11 23 GPM 34 3 6 9 (Q) 45 12 45 12 55

Catalog HY15-351/US P.O. Sequence Valve (Internal Pilot) Series H81 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 36.6 (1.44) 36.6 (1.44) 44.7 (1.76) 42.4 (1.67) 3/4-16 UNF-2A Thread 7/8" Hex. 43-49 Nm (32-36 lb. ft.) 41.9 (1.65) THIRD-ANG PROJECTION Screw/Knob Version 14.2 (.56) Fixed Cap/Tamper Resistant Version Ordering Information H81 8 Size P.O. Sequence Valve (Internal Pilot) Style Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (717943) Range Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ crack pressure, approximately.95 (.25 GPM) 2 6.9-138 (1-2 ) 69 (1 ) @ crack pressure, approximately.95 (.25 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ crack pressure, approximately.95 (.25 GPM) 5 13.8-345 (2-5 ) 172.4 (25 ) @ crack pressure, approximately.95 (.25 GPM) Seals Optional Setting Body Material Code Seals / Kit No. Omit D -Ring / (SK8-3) N Nitrile / (SK8-3N) V Fluorocarbon / (SK8-3V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Port Size Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-3-*4P) 4T SAE-4 (B8-3-*4T) 6T SAE-6 (B8-3-*6T) 6B 3/8 BSPG (B8-3-*6B) * Add A for aluminum, omit for steel. 56

Catalog HY15-351/US Information General Description Pilot Operated Sequence Valve (Internally Piloted, Externally Drained). For additional information see Tips on pages 1-6. Features Hardened, precision ground parts for durability Low profile adapter for minimal space requirements Fully guided poppet for more consistent reseat Steel adapters are coated with yellow zinc dichromate for protection from salt spray Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Maximum Drain (Port 3) Reseat 56.3 (15 GPM) 38 (55 ) 35 (5 ) 35 (5 ).94 (.25 GPM) 9% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @ 21 (3 ) Cartridge Material Operating Temp. Range/Seals Fluid Campatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.45 kg (1. lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NTF1-3R Finisher NFT1-3F P.O. Sequence Valve (Internal Pilot) Series H11 Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Internal screening protects pilot spring from debris Performance Curves vs. Inlet ( rise through cartridge only),, 6 1 4 3 2 1 414 5 345 4 276 3 27 2 138 69 11.4 22.7 34.1 GPM 45.4 3 6 9 12 (Q) 27.6 2.7 13.8 6.9 Hydraulic Oil 15 SSU @ 1 F (32 cst) Hydraulic Oil 15 SSU @ 1 F (32 cst) Low Range 11.4 22.7 34.1 GPM 45.4 3 6 9 12 (Q) 56.8 15 56.8 15 57

Catalog HY15-351/US P.O. Sequence Valve (Internal Pilot) Series H11 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 34.2 (1.35) 34.2 (1.35) 44.1 (1.74) 41.9 (1.65) 7/8-14 UNF-2A Thread 1" Hex. 69-75 Nm (51-55 lb. ft.) 45.9 (1.81) Ø 15.8 (.62) THIRD-ANG PROJECTION Screw/Knob Version Fixed Cap/Tamper Resistant Version Ordering Information H11 1 Size P.O. Sequence Valve (Internal Pilot) Style Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (71883) Range Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ crack pressure, approximately.95 (.25 GPM) 2 6.9-138 (1-2 ) 69 (1 ) @ crack pressure, approximately.95 (.25 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ crack pressure, approximately.95 (.25 GPM) 5 13.8-345 (2-5 ) 172.4 (25 ) @ crack pressure, approximately.95 (.25 GPM) Seals Optional Setting Body Material Code Seals / Kit No. Omit D -Ring / (SK1-3) N Nitrile / (SK1-3N) V Fluorocarbon / (SK1-3V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Port Size Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8B) * Add A for aluminum, omit for steel. Steel body only. 58

Catalog HY15-351/US Information General Description Pilot Operated Sequence Valve (Internally Piloted, Externally Drained). For additional information see Tips on pages 1-6. P.O. Sequence Valve (Internal Pilot) Series H161 Features Hardened, precision ground parts for durability High accuracy, pilot operation design Ball-type pilot for added stability All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Tank Sequence Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Maximum Drain Reseat 151.6 (4 GPM) 38 (55 ) 35 (5 ) 35 (5 ) 1.9 (.5 GPM) 8% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @ 75% of Crack Cartridge Material Operating Temp. Range/Seals Fluid Campatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.45 kg (1. lbs.) Cavity C16-3 (See Section for more details) Form Tool Rougher NTF16-3R Finisher NFT16-3F Performance Curve vs. Inlet ( rise through cartridge only) 6 5 345 2 138 1 414 4 276 3 27 69 Hydraulic Oil 15 SSU @ 1 F (32 cst) 37.9 75.9 113.7 GPM 151.6 1 2 3 4 (Q) 59

Catalog HY15-351/US P.O. Sequence Valve (Internal Pilot) Series H161 Information Dimensions Millimeters (Inches) 36.4 (1.43) 36.9 (1.45) 38.1 (1.5) Dia. Knob 39.5 (1.55) 38.8 (1.53) 72.1 (2.84) 1-5/16-12 UN-2A Thread 1-1/2" Hex. 99 Nm (73 lb. ft.) THIRD-ANG PROJECTION Screw/Knob Version Ø 26.9 (1.6) Ø 28.5 (1.12) Fixed Cap/Tamper Resistant Version Ordering Information H161 16 Size P.O. Sequence Valve (Internal Pilot) Style Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ 11.3 (3 GPM) 2 13.8-138 (2-2 ) 69 (1 ) @ 11.3 (3 GPM) 3 2.7-27 (3-3 ) 13.5 (15 ) @ 11.3 (3 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @ 11.3 (3 GPM) Range Seals Optional Setting Body Material Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit Nitrile / (SK16-3) K Knob Adjust (717784-15) V Fluorocarbon / (SK16-3V) S Screw Adjust T Tamper Resistant Cap (717785) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at 11.3 (3 GPM) Port Size Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 12T SAE-12 (B16-3-*12T) 16T SAE-16 (B16-3-*16T) * Add A for aluminum, omit for steel. 6

Catalog HY15-351/US Information General Description Pilot Operated Sequence Valve (Externally Piloted, Internally Vented). For additional information see Tips on pages 1-6. Features Hardened, precision ground parts for durability Low profile adapter for minimal space requirements Fully guided poppet for more consistent reseat Steel adapters are coated with yellow zinc dichromate for protection from salt spray Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Internal screening protects pilot spring from debris Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Maximum Drain Reseat 56.3 (15 GPM) 38 (55 ) 35 (5 ) 35 (5 ) See maximum drain flow chart (Lower right) 9% of crack pressure Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @ 21 (3 ) Cartridge Material Operating Temp. Range/Seals Fluid Campatibility/ Viscosity All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.45 kg (1. lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NTF1-3R Finisher NFT1-3F P.O. Sequence Valve (External Pilot) Series H12 Performance Curve vs. Inlet ( rise through cartridge only), 25 2 15 1 5 17 14 1 6.8 3.4 11.4 22.7 34.1 45.4 GPM 56.8 3 6 9 12 15 (Q) Maximum Drain P PILOT - P SETTING Drain 6.9 (1 ).34 (.9 GPM) 35 (5 ).76 (.2 GPM) 69 (1 ) 1.8 (.29 GPM) 138 (2 ) 1.53 (.4 GPM) 27 (3 ) 1.87 (.5 GPM) Hydraulic Oil 15 SSU @ 1 F (32 cst) 61

Catalog HY15-351/US P.O. Sequence Valve (External Pilot) Series H12 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 34.2 (1.35) 34.2 (1.35) 44.1 (1.74) 41.9 (1.65) 7/8-14 UNF-2A Thread 1" Hex. 69-75 Nm (51-55 lb. ft.) 45.9 (1.81) Ø 15.8 (.62) THIRD-ANG PROJECTION Screw/Knob Version Fixed Cap/Tamper Resistant Version Ordering Information H12 1 Size P.O. Sequence Valve (External Pilot) Style Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (71883) Range Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ crack pressure, approximately.95 (.25 GPM) 2 6.9-138 (1-2 ) 69 (1 ) @ crack pressure, approximately.95 (.25 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ crack pressure, approximately.95 (.25 GPM) 5 13.8-345 (2-5 ) 172.4 (25 ) @ crack pressure, approximately.95 (.25 GPM) Seals Optional Setting Body Material Code Seals / Kit No. Omit D -Ring / (SK1-3) N Nitrile / (SK1-3N) V Fluorocarbon / (SK1-3V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Port Size Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8B) * Add A for aluminum, omit for steel. Steel body only. 62

Catalog HY15-351/US Information General Description Pilot Operated Sequence Valve (Externally Piloted, Internally Vented). For additional information see Tips on pages 1-6. P.O. Sequence Valve (External Pilot) Series H162 Features Hardened, precision ground parts for durability High accuracy, pilot operation design Ball-type pilot for added stability All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Sequence Specifications Pilot Rated Maximum Inlet Maximum Setting Maximum Tank Maximum Drain Reseat 151.6 (4 GPM) 38 (55 ) 35 (5 ) 35 (5 ) See maximum drain flow chart (Lower right) 8% of Crack Leakage at 82 cc/min. (5 cu. in./min.) 15 SSU (32 cst) @ 75% of Crack Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.45 kg (1. lbs.) Cavity C16-3 (See Section for more details) Form Tool Rougher NFT16-3R Finisher NFT16-3F Performance Curve vs. Inlet ( rise through cartridge only) 15 125 1 75 5 25 1 8.6 6.9 5.2 3.4 1.7 Hydraulic Oil 15 SSU @ 1 F (32 cst) 37.9 75.8 113.6 GPM 151.6 1 2 3 4 (Q) Maximum Drain P PILOT - P SETTING Drain 6.9 (1 ).69 (.18 GPM) 35 (5 ) 1.55 (.41 GPM) 69 (1 ) 2.19 (.58 GPM) 138 (2 ) 3.1 (.82 GPM) 27 (3 ) 3.79 (1. GPM) 63

Catalog HY15-351/US P.O. Sequence Valve (External Pilot) Series H162 Information Dimensions Millimeters (Inches) 36.4 (1.43) 36.9 (1.45) 38.1 (1.5) Dia. Knob 39.5 (1.55) 38.8 (1.53) 72.1 (2.84) 1-5/16-12 UN-2A Thread 1-1/2" Hex. 99 Nm (73 lb. ft.) Ø 26.9 (1.6) Ø 28.5 (1.12) THIRD-ANG PROJECTION Screw/Knob Version Fixed Cap/Tamper Resistant Version Ordering Information H162 16 Size P.O. Sequence Valve (External Pilot) Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit Nitrile / (SK16-3) K Knob Adjust (717784-15) V Fluorocarbon / (SK16-3V) S Screw Adjust T Tamper Resistant Cap (717785) Optional Setting Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ 11.3 (3 GPM) 2 13.8-138 (2-2 ) 69 (1 ) @ 11.3 (3 GPM) 3 2.7-27 (3-3 ) 13.5 (15 ) @ 11.3 (3 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @ 11.3 (3 GPM) 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at 11.3 (3 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 12T SAE-12 (B16-3-*12T) 16T SAE-16 (B16-3-*16T) * Add A for aluminum, omit for steel. 64

Catalog HY15-351/US Information General Description Pilot Operated Sequence Valve with Reverse. For additional information see Tips on pages 1-6. P.O. Sequence Valve With Reverse Series B4D3 Features High flow capacity For use on clamp and drill circuits where pressure is to be maintained regardless of drop in system pressure Integral 25 micron pilot flow filter Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated Specifications Rated Maximum Inlet 7 (18.5 GPM) 42 (6 ) Performance Curve ( rise through cartridge only) vs. Inlet 1 to 2 58 4 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum H - 1-21 (145-3 ) Setting P - 1-42 (145-6 ) Maximum Tank 42 (6 ) Leakage at 5 drops/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight Cavity.25 kg (.55 lbs.) C1-3S (See Section for more details) Form Tool Rougher NFT1S-3R Finisher NFT1S-3F Drop 435 3 29 2 145 1 GPM Application FREE FLOW 2 to 1 2 5.3 4 1.6 NOTE: Drain line should be piped directly back to tank. Any back pressure in the drain line will be additive to the sequence pressure. 6 15.9 (Q) 8 21.2 Clamp 1 26.5 Drill 12 31.7 65

Catalog HY15-351/US P.O. Sequence Valve With Reverse Series B4D3 Information Dimensions Millimeters (Inches) 21.8 (.86) max 39.5 (1.56) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 48 (1.89) 7/8" - 14 UNF Ordering Information B4D3 1 Size Pilot Operated Sequence Valve Range Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Style Optional Setting Seals Optional Setting Specify setting if required () B4D3H 1 (145 ) @ 15 (4. GPM) B4D3P 2 (29 ) @ 15 (4. GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK354N-1) V Fluorocarbon / (SK354V-1) Order Bodies Separately LB1 Line Body Porting Code Porting 71 5/8 SAE (main) 3/8 SAE (aux) 711 3/4 BSP (main) 1/4 BSP (aux) Code Body Material A Aluminum S Steel Body Material 66

Catalog HY15-351/US Information General Description Kick-Down, Spool Type, Pilot Operated Sequence Valve. For additional information see Tips on pages 1-6. P.O. Sequence Valve, Kick-Down Series B4C3 Features High flow capacity Integral 25 micron pilot flow filter Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated Specifications Rated Maximum Inlet 16 (42 GPM) 42 (6 ) Maximum H - 1-21 (145-3 ) Setting P - 1-42 (145-6 ) Maximum Tank 42 (6 ) Sensitivity: H - 3 (435 ) /Turn P - 55 (8 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight Cavity.27 kg (.55 lbs.) C1-3S (See Section for more details) Form Tool Rougher NFT1S-3R Finisher NFT1S-3F Performance Curve ( rise through cartridge only) Drop vs. 1 to 2 Drop 29 218 145 73 GPM 2 15 1 5 4 1.6 Application Note Valve unloads completely when setting is reached and resets when fluid supply is removed. 8 21.1 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) 12 31.7 16 42.3 67

Catalog HY15-351/US P.O. Sequence Valve, Kick-Down Series B4C3 Information Dimensions Millimeters (Inches) 5 AF Hex socket 21.8 (.86) max 39.5 (1.56) 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 47.5 (1.87) 7/8" - 14 UNF Ordering Information B4C3 1 Size Kick-Down Pilot Operated Sequence Valve Range Code Range H 1-21 (145-3 ) P 1-42 (145-6 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Style Optional Setting Seals Optional Setting Specify setting if required () B4C3H 1 (145 ) B4C3P 2 (29 ) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK354N-1) V Fluorocarbon / (SK354V-1) Order Bodies Separately LB1 Line Body Porting Code Porting 71 5/8 SAE (main) 3/8 SAE (aux) 711 3/4 BSP (main) 1/4 BSP (aux) Code Body Material A Aluminum S Steel Body Material 68

Catalog HY15-351/US Information General Description Direct Acting Sequence Valve with Internal Pilot and Drain. For additional information see Tips on pages 1-6. D.A. Sequence Valve (Internal Pilot & Drain) Series B2E3F Features Hardened working parts for maximum durability All external parts zinc plated Adjustable and tamperproof versions available Specifications Rated Maximum Inlet 3 (8 GPM) 42 (6 ) Performance Curves ( rise through cartridge only) vs. Inlet 1 to 2 29 2 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting Maximum Tank 2-148 (3-215 ) 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 35 (58 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.21 kg (.46 lbs.) Cavity C8-3 (See Section for more details) Form Tool Rougher NFT8-3R Finisher NFT8-3F Drop 2175 15 145 1 725 GPM 5 5 1.3 5 1.3 1 2.6 Drop vs. Drop 29 218 145 73 GPM 2 15 1 5 1 2.6 15 4. (Q) 15 4. (Q) 2 5.3 Hydraulic Oil 15 SSU @ 1 F (32 cst) 2 to 3 1 to 2 2 5.3 25 6.6 25 6.6 3 7.9 3 7.9 69

Catalog HY15-351/US D.A. Sequence Valve (Internal Pilot & Drain) Series B2E3F Information Dimensions Millimeters (Inches) 21 (.83) max 57 (2.24) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 22 AF Hex. 4 Nm (3 lb. ft.) 3/4" - 16 UNF 4.6 (1.6) Ordering Information B2E3 F 8 Size D.A. Sequence Valve (Int. Pilot & Drain) Range Style Optional Setting Seals Body Material Port Size Code Range F 2-148 (3-215 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () B2E3F 75 (11 ) @ 5 (1.3 GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK351N-1) V Fluorocarbon / (SK351V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-3-*4P) 4T SAE-4 (B8-3-*4T) 6T SAE-6 (B8-3-*6T) 6B 3/8 BSPG (B8-3-*6B) * Add A for aluminum, omit for steel. 7

Catalog HY15-351/US Information General Description Direct Acting Sequence Valve with Internal Pilot and Drain. For additional information see Tips on pages 1-6. D.A. Sequence Valve (Internal Pilot & Drain) Series B4E3 Features Hardened working parts for maximum durability All external parts zinc plated Adjustable and tamperproof versions available Specifications Rated Maximum Inlet 5 (13 GPM) 42 (6 ) Performance Curves ( rise through cartridge only) vs. Inlet 1 to 2 29 2 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum E - 2-8 (3-116 ) Setting G - 2-166 (3-24 ) Maximum Tank 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 6 (87 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.27 kg (.6 lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NFT1-3R Finisher NFT1-3F Drop 2175 15 145 1 725 GPM GPM 5 1 2.6 1 2.6 2 3 5.3 7.9 (Q) Drop vs. 1 to 2 and 2 to 3 Drop 29 218 145 73 2 15 1 5 2 3 5.3 7.9 (Q) 4 1.6 Hydraulic Oil 15 SSU @ 1 F (32 cst) 4 1.6 5 13.2 5 13.2 71

Catalog HY15-351/US D.A. Sequence Valve (Internal Pilot & Drain) Series B4E3 Information Dimensions Millimeters (Inches) 22 (.87) max 59 (2.32) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 7/8" - 14 UNF 46.5 (1.83) Ordering Information B4E3 1 Size D.A. Sequence Valve (Int. Pilot & Drain) Range Style Optional Setting Seals Body Material Port Size Code Range E 2-8 (3-116 ) G 2-166 (3-24 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () B4E3E 4 (58 ) @ 5 (1.3 GPM) B4E3G 8 (116 ) @ 5 (1.3 GPM) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK355N-1) V Fluorocarbon / (SK355V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8P) * Add A for aluminum, omit for steel. Steel body only. 72

Catalog HY15-351/US Information General Description Direct Acting, Normally Closed Sequence Valve with External Pilot and Internal Drain. For additional information see Tips on pages 1-6. D.A., N.C. Sequence Valve (Ext. Pilot, Int. Drain) Series B4F3 Features Sealed pilot option available Hardened working parts for maximum durability All external parts zinc plated Adjustable and tamperproof versions available Specifications Rated Maximum Inlet 34 (9 GPM) 42 (6 ) Performance Curves ( rise through cartridge only) vs. Inlet 3 to 2 29 2 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum E - 2-8 (3-116 ) Setting G - 2-166 (3-24 ) Maximum Tank 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.3 kg (.66 lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NFT1-3R Finisher NFT1-3F Pilot 2175 15 145 1 725 GPM 5 1 2.6 1 2.6 2 5.3 (Q) Drop vs. 3 to 2 Drop 29 218 145 73 GPM 2 15 1 5 2 5.3 (Q) 3 7.9 Hydraulic Oil 15 SSU @ 1 F (32 cst) 3 7.9 4 1.6 4 1.6 73

Catalog HY15-351/US D.A., N.C. Sequence Valve (Ext. Pilot, Int. Drain) Series B4F3 Information Dimensions Millimeters (Inches) 22 (.87) max 59 (2.32) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 7/8" - 14 UNF 46.5 (1.83) Ordering Information B4F3 1 Size D.A. Sequence Valve (External Pilot & Internal Drain) Pilot Range Style Pilot Switching Seals Sealed Pilot Body Material Port Size Code Pilot Range E 2-8 (3-116 ) G 2-166 (3-24 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Code Pilot Switching Omit Omit for no setting (Std.) B4F3E 4 (58 ) @ 5 (1.3 GPM) B4F3G 8 (116 ) @ 5 (1.3 GPM) Specify setting if required Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK355N-1) V Fluorocarbon / (SK355V-1) Code Sealed Pilot Omit Omit if not required S Sealed Pilot Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8P) * Add A for aluminum, omit for steel. Steel body only. 74

Catalog HY15-351/US Information General Description Direct Acting, Normally Open Sequence Valve with External Pilot and Internal Drain. For additional information see Tips on pages 1-6. D.A., N.O. Sequence Valve (Ext. Pilot, Int. Drain) Series B4G3 Features Sealed pilot option available Hardened working parts for maximum durability All external parts zinc plated Adjustable and tamperproof versions available Specifications Rated Maximum Inlet 4 (1.6 GPM) 42 (6 ) Performance Curves ( rise through cartridge only) vs. Inlet 2 to 3 29 2 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum E - 2-8 (3-116 ) Setting G - 2-166 (3-24 ) Maximum Tank 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.3 kg (.66 lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NFT1-3R Finisher NFT1-3F Pilot 2175 15 145 1 725 GPM 5 1 2.6 Drop vs. 2 to 3 Drop 29 218 145 73 GPM 2 15 1 5 1 2.6 2 5.3 (Q) 2 5.3 (Q) 3 7.9 Hydraulic Oil 15 SSU @ 1 F (32 cst) 3 7.9 4 1.6 4 1.6 75

Catalog HY15-351/US D.A., N.O. Sequence Valve (Ext. Pilot, Int. Drain) Series B4G3 Information Dimensions Millimeters (Inches) 22 (.87) max 59 (2.32) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) 7/8" - 14 UNF 46.5 (1.83) Ordering Information B4G3 1 Size D.A. Sequence Valve (External Pilot & Internal Drain) Pilot Range Style Pilot Switching Seals Sealed Pilot Body Material Port Size Code Pilot Range E 2-8 (3-116 ) G 2-166 (3-24 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Code Pilot Switching Omit Omit for no setting (Std.) B4G3E 4 (58 ) @ 5 (1.3 GPM) B4G3G 8 (116 ) @ 5 (1.3 GPM) Specify setting if required Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK355N-1) V Fluorocarbon / (SK355V-1) Code Sealed Pilot Omit Omit if not required S Sealed Pilot Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8P) * Add A for aluminum, omit for steel. Steel body only. 76

Catalog HY15-351/US Information General Description Direct Acting, Normally Closed Sequence Valve with External Pilot and Drain. For additional information see Tips on pages 1-6. D.A., N.C. Sequence Valve (Ext. Pilot & Drain) Series B4H4 Features Sealed pilot option available Hardened working parts for maximum durability All external parts zinc plated Adjustable and tamperproof versions available (4) (4) Specifications Rated Maximum Inlet 47 (12 GPM) 42 (6 ) Performance Curves ( rise through cartridge only) vs. Inlet 2 to 3 29 2 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum E - 2-8 (3-116 ) Setting G - 2-166 (3-24 ) Maximum Tank 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.33 kg (.73 lbs.) Cavity C1-4 (See Section for more details) Form Tool Rougher NFT1-4R Finisher NFT1-4F Pilot 2175 15 145 1 725 GPM 5 GPM 1 2.6 1 2.6 2 3 5.3 7.9 (Q) Drop vs. 3 to 2 Drop 29 218 145 73 2 15 1 5 2 3 5.3 7.9 (Q) 4 1.6 Hydraulic Oil 15 SSU @ 1 F (32 cst) 4 1.6 5 13.2 5 13.2 77

Catalog HY15-351/US D.A., N.C. Sequence Valve (Ext. Pilot & Drain) Series B4H4 Information Dimensions Millimeters (Inches) 22 (.87) max 5 AF Hex socket 59 (2.32) 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) (4) 7/8" - 14 UNF 62.5 (2.46) Ordering Information B4H4 1 Size D.A. Sequence Valve (External Pilot and Drain) Pilot Range Style Pilot Switching Seals Sealed Pilot Body Material Port Size Code Pilot Range E 2-8 (3-116 ) G 2-166 (3-24 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Code Pilot Switching Omit Omit for Standard Setting B4H4E 4 (58 ) @ 5 (1.3 GPM) B4H4G 8 (116 ) @ 5 (1.3 GPM) Specify setting if required Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK356N-1) V Fluorocarbon / (SK356V-1) Code Sealed Pilot Omit Omit if not required S Sealed Pilot Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 6P 3/8 NTPF (B1-4-*6P) 6T SAE-6 (B1-4-*6T) 8T SAE-8 (B1-4-*8T) 6B 3/8 BSPG (B1-4-6B) * Add A for aluminum, omit for steel. Steel bodies only 78

Catalog HY15-351/US Information General Description Direct Acting, Normally Open Sequence Valve with External Pilot and Drain. For additional information see Tips on pages 1-6. D.A., N.O. Sequence Valve (Ext. Pilot & Drain) Series B4J4 Features Sealed pilot option available Hardened working parts for maximum durability All external parts zinc plated Adjustable and tamperproof versions available (4) (4) Specifications Rated Maximum Inlet 47 (12 GPM) 42 (6 ) Performance Curves ( rise through cartridge only) vs. Inlet 2 to 3 & 3 to 2 29 2 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum E - 2-8 (3-116 ) Setting G - 2-166 (3-24 ) Maximum Tank 42 (6 ) Leakage at 25 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.33 kg (.73 lbs.) Cavity C1-4 (See Section for more details) Form Tool Rougher NFT1-4R Finisher NFT1-4F Pilot 2175 15 145 1 725 GPM 5 GPM 1 2.6 1 2.6 2 3 5.3 7.9 (Q) Drop vs. 2 to 3 & 3 to 2 Drop 29 218 145 73 2 15 1 5 2 3 5.3 7.9 (Q) 4 1.6 Hydraulic Oil 15 SSU @ 1 F (32 cst) 4 1.6 5 13.2 5 13.2 79

Catalog HY15-351/US D.A., N.O. Sequence Valve (Ext. Pilot & Drain) Series B4J4 Information Dimensions Millimeters (Inches) 22 (.87) max 5 AF Hex socket 59 (2.32) 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) (4) 7/8" - 14 UNF 62.5 (2.46) Ordering Information B4J4 1 Size D.A. Sequence Valve (External Pilot and Drain) Pilot Range Style Pilot Switching Seals Sealed Pilot Body Material Port Size Code Pilot Range E 2-8 (3-116 ) G 2-166 (3-24 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Code Pilot Switching Omit Omit for no setting (Std.) B4J4E 4 (58 ) @ 5 (1.3 GPM) B4J4G 8 (116 ) @ 5 (1.3 GPM) Specify setting if required Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK356N-1) V Fluorocarbon / (SK356V-1) Code Sealed Pilot Omit Omit if not required S Sealed Pilot Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 6P 3/8 NTPF (B1-4-*6P) 6T SAE-6 (B1-4-*6T) 8T SAE-8 (B1-4-*8T) 6B 3/8 BSPG (B1-4-6B) * Add A for aluminum, omit for steel. Steel bodies only 8

Catalog HY15-351/US Information General Description Direct Acting, Normally Open, 3 Way Sequence Valve with Internal Pilot and External Drain. For additional information see Tips on pages 1-6. D.A., N.O. Sequence Valve (Int. Pilot, Ext. Drain) Series B4K4 Features Sealed pilot option available Hardened working parts for maximum durability All external parts zinc plated Adjustable and tamperproof versions available (4) (4) Specifications Rated Maximum Inlet 42 (11 GPM) 42 (6 ) Maximum E - 2-8 (3-116 ) Setting G - 2-166 (3-24 ) Maximum Tank 42 (6 ) Leakage at 4 ml/min. 15 SSU (32 cst) @ 1 (145 ) Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.33 kg (.73 lbs.) Cavity C1-4 (See Section for more details) Form Tool Rougher NFT1-4R Finisher NFT1-4F Performance Curves ( rise through cartridge only) vs. Inlet Pilot Drop 29 725 Drop vs. 58 435 29 145 2 2175 15 145 1 GPM 5 4 3 2 1 GPM 1 2.6 1 2.6 Hydraulic Oil 15 SSU @ 1 F (32 cst) 3 to 4 3 to 4 3 to 4 2 3 5.3 7.9 (Q) Hydraulic Oil 15 SSU @ 1 F (32 cst) 2 3 5.3 7.9 (Q) 3 to 2 3 to 2 3 to 2 4 1.6 4 1.6 3 to 4 3 to 2 5 13.2 5 13.2 81

Catalog HY15-351/US D.A., N.O. Sequence Valve (Int. Pilot, Ext. Drain) Series B4K4 Information Dimensions Millimeters (Inches) 22 (.87) max 5 AF Hex socket 59 (2.32) 17 AF Hex. 12 Nm (9 lb. ft.) 26 AF Hex. 5 Nm (37 lb. ft.) (4) 7/8" - 14 UNF 62.5 (2.46) Ordering Information B4K4 1 Size D.A. Sequence Valve (Internal Pilot & External Drain) Pilot Range Style Pilot Switching Seals Sealed Pilot Body Material Port Size Code Pilot Range E 2-8 (3-116 ) G 2-166 (3-24 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Code Pilot Switching Omit Omit for Standard Setting B4K4E 4 (58 ) @ 5 (1.3 GPM) B4K4G 8 (116 ) @ 5 (1.3 GPM) Specify setting if required Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK356N-1) V Fluorocarbon / (SK356V-1) Code Sealed Pilot Omit Omit if not required S Sealed Pilot Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 6P 3/8 NTPF (B1-4-*6P) 6T SAE-6 (B1-4-*6T) 8T SAE-8 (B1-4-*8T) 6B 3/8 BSPG (B1-4-6B) * Add A for aluminum, omit for steel. Steel bodies only 82

Catalog HY15-351/US Information General Description Direct Acting Reducing/Relieving Valve. For additional information see Tips on pages 1-6. D.A. Reducing/Relieving Valve Series C2A3 Features Maximum pressure setting up to 15, 2175 Three pressure ranges available for more accurate pressure control Partial reverse flow capability Hardened working parts for maximum durability Adjustable and tamperproof versions available All external parts zinc plated Specifications Rated Maximum Inlet 2 (5 GPM) 42 (6 ) Maximum C - 5-4 (73-58 ) Setting E - 25-75 (363-188 ) G - 5-15 (725-2175 ) Performance Curve ( rise through cartridge only) vs. Regulated 232 16 174 12 Tank Inlet Reg. Hydraulic Oil 15 SSU @ 1 F (32 cst) RELIEVING 1 to 3 REGULATING 2 to 1 Maximum Tank Cartridge Material Operating Temp. Range/Seals Fluid Compatibility/ Viscosity 42 (6 ) All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better 116 8 58 4 2 GPM 5.3 15 4. Relieving 1 2.6 5 1.3 (Q) Regulating 5 1 15 1.3 2.6 4. 2 5.3 Approx. Weight.2 kg (.44 lbs.) Cavity C8-3 (See Section for more details) Form Tool Rougher NFT8-3R Finisher NFT8-3F 83

Catalog HY15-351/US D.A. Reducing/Relieving Valve Series C2A3 Information Dimensions Millimeters (Inches) 21 (.83) max 57 (2.24) 5 AF Hex socket 17 AF Hex. 12 Nm (9 lb. ft.) 22 AF Hex. 4 Nm (3 lb. ft.) 3/4" - 16 UNF 4.6 (1.6) Ordering Information C2A3 8 Size D.A. Reducing/Relieving Valve Range Style Optional Setting Seals Body Material Port Size Code Range C 5-4 (73-58 ) E 25-75 (363-188 ) G 5-15 (725-2175 ) Code Style / Kit No. Z Screw Adjust (Std.) W Knob Adjust T Tamper Resistant Cap (TC113) Optional Setting Specify setting if required () C2A3C 2 (29 ) C2A3E 38 (551 ) C2A3G 75 (188 ) Code Seals / Kit No. N Nitrile, Buna-N (Std.) / (SK351N-1) V Fluorocarbon / (SK351V-1) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-3-*4P) 4T SAE-4 (B8-3-*4T) 6T SAE-6 (B8-3-*6T) 6B 3/8 BSPG (B8-3-*6B) * Add A for aluminum, omit for steel. 84

Catalog HY15-351/US Information D.A. Reducing/Relieving Valve Series PR13 General Description Direct Acting Reducing/Relieving Valve. For additional information see Tips on pages 1-6. Note: The differential between system pressure and pressure setting of the valve can greatly affect the stability of this valve. For best performance, the inlet pressure setting should not exceed 69 (1 ) above the reducing valve setting. Features Hardened, precision ground parts for durability Internal mechanical stop limits spool travel eliminating spring solidification D -Ring eliminates backup rings All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Specifications Rated Maximum Inlet 56 (15 GPM) 21 (3 ) 69 (1 ) maximum differential above valve setting for best stability Performance Curves ( rise through cartridge only) vs. Regulated 4 276 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting 124 (18 ) 3 27 Maximum Tank Maximum Drain Cartridge Material Operating Temp. Range/Seals Fluid Campatibility/ Viscosity 124 (18 ) 12 ml/min. (.3 GPM) All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NTF1-3R Finisher NFT1-3F vs. 2 138 1 57 GPM 15 1 75 5 25 GPM 69 69 52 35 17 Relieving 38 19 1 5 Hydraulic Oil 15 SSU @ 1 F (32 cst) 11 3 (Q) Port 2 to 1 23 34 6 9 (Q) Reducing 19 38 5 1 45 12 57 15 57 15 85

Catalog HY15-351/US D.A. Reducing/Relieving Valve Series PR13 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 78.4 (3.9) 78.4 (3.9) 84.1 (3.31) 81.9 (3.22) 7.3 (2.77) 7/8-14 UNF-2A Thread 1" Hex. 5-56 Nm (37-41 lb. ft.) 46.1 (1.82) Ø 15.8 (.62) 46.1 (1.82) THIRD-ANG PROJECTION Screw/Knob Version Fixed Cap/Tamper Resistant Version Non-Adjustable Version Ordering Information PR13 1 Size D.A. Reducing/Relieving Valve Style Range Code Range 2 3.5-13.8 (5-2 ) 6.9 (1 ) @.95 (.25 GPM) 6 6.9-41.4 (1-6 ) 2.7 (3 ) @.95 (.25 GPM) 12 13.8-83 (2-12 ) 41.4 (6 ) @.95 (.25 GPM) 21 27.6-124 (4-18 ) 69 (1 ) @.95 (.25 GPM) Seals Optional Setting Body Material Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit D -Ring / (SK1-3) K Knob Adjust (717784-1) N Nitrile / (SK1-3N) N Non-Adjustable V Fluorocarbon / (SK1-3V) S Screw Adjust T Tamper Resistant Cap (717943) Optional Setting 1 i.e. 15 = 15 (Omit if standard setting is used) Setting Range: 5 to 21 All settings at.95 (.25 GPM) Port Size Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8P) * Add A for aluminum, omit for steel. Steel body only. 86

Catalog HY15-351/US Information General Description Pilot Operated Reducing Valve. For additional information see Tips on pages 1-6. Pilot Operated Reducing Valve Series PRH82 Features Hardened, precision ground parts for durability Low profile adapter for minimal space requirements Fully guided pilot for more consistent reseat Steel adapters are coated with yellow zinc dichromate for protection from salt spray Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Internal screening protects pilot spring from debris Specifications Rated Maximum Inlet Maximum Setting Maximum Tank Maximum Drain Cartridge Material Operating Temp. Range/Seals Fluid Campatibility/ Viscosity 3 (8 GPM) 38 (55 ) 35 (5 ) 35 (5 ).56 (.15 GPM) All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.11 kg (.25 lbs.) Cavity C8-3 (See Section for more details) Form Tool Rougher NTF8-3R Finisher NFT8-3F Performance Curves vs. (Through cartridge only), Hydraulic Oil 15 SSU @ 1 F (32 cst) 5 345 4 276 3 27 2 138 1 69 8 15 GPM 23 2 4 6 (Q) vs. Drop (Through cartridge only) Drop ( P) 4 3 27.6 2.7 2 13.8 Hydraulic Oil 15 SSU @ 1 F (32 cst) Port 2 to 1 1 6.9 8 15 GPM 23 2 4 6 (Q) 3 8 3 8 87

Catalog HY15-351/US Pilot Operated Reducing Valve Series PRH82 Information Dimensions Millimeters (Inches) 25.4 (1.) Dia. Knob 36.6 (1.44) 36.6 (1.44) 44.7 (1.76) 42.4 (1.67) 3/4-16 UNF-2A Thread 7/8" Hex. 43-49 Nm (32-36 lb. ft.) 41.9 (1.65) THIRD-ANG PROJECTION Screw/Knob Version 14.2 (.56) Fixed Cap/Tamper Resistant Version Ordering Information PRH82 8 Size P.O. Reducing Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (717943) Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ crack pressure, approximately.95 (.25 GPM) 2 6.9-138 (1-2 ) 69 (1 ) @ crack pressure, approximately.95 (.25 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ crack pressure, approximately.95 (.25 GPM) 5 13.8-345 (2-5 ) 172.4 (25 ) @ crack pressure, approximately.95 (.25 GPM) Code Seals / Kit No. Omit D -Ring / (SK8-3) N Nitrile / (SK8-3N) V Fluorocarbon / (SK8-3V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B8-3-*4P) 4T SAE-4 (B8-3-*4T) 6T SAE-6 (B8-3-*6T) 6B 3/8 BSPG (B8-3-*6B) * Add A for aluminum, omit for steel. 88

Catalog HY15-351/US Information General Description Pilot Operated Reducing Valve. For additional information see Tips on pages 1-6. Pilot Operated Reducing Valve Series PRH12 Features Hardened, precision ground parts for durability Low profile adapter for minimal space requirements Fully guided poppet for more consistent reseat Steel adapters are coated with yellow zinc dichromate for protection from salt spray Polyurethane D -Ring eliminates backup rings and prevents hydrolysis Internal screening protects pilot spring from debris Specifications Performance Curves Rated Maximum Inlet Maximum Setting Maximum Tank Maximum Drain Cartridge Material Operating Temp. Range/Seals Fluid Campatibility/ Viscosity 56.3 (15 GPM) 38 (55 ) 35 (5 ) 35 (5 ).94 (.25 GPM) All parts steel. All operating parts hardened steel. -45 C to +93.3 C ( D -Ring) (-5 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.23 kg (.5 lbs.) Cavity C1-3 (See Section for more details) Form Tool Rougher NTF1-3R Finisher NFT1-3F vs. (Through cartridge only), Hydraulic Oil 15 SSU @ 1 F (32 cst) 5 345 4 276 3 27 2 138 1 69 11.4 22.7 45.4 GPM 34.1 3 6 9 (Q) 12 vs. (Through cartridge only), 4 3 27.6 2.7 2 13.8 Hydraulic Oil 15 SSU @ 1 F (32 cst) Port 2 to 1 1 6.9 11.4 22.7 34.1 GPM 45.4 3 6 9 12 (Q) 56.8 15 56.8 15 89

Catalog HY15-351/US Information Dimensions Millimeters (Inches) Pilot Operated Reducing Valve Series PRH12 25.4 (1.) Dia. Knob 34.2 (1.35) 34.2 (1.35) 44.1 (1.74) 41.9 (1.65) 7/8-14 UNF-2A Thread 1" Hex. 69-75 Nm (51-55 lb. ft.) 45.9 (1.81) Ø 15.8 (.62) THIRD-ANG PROJECTION Ordering Information Screw/Knob Version Fixed Cap/Tamper Resistant Version PRH12 1 Size P.O. Reducing Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. F Fixed style, preset at factory. K Knob Adjust (717784-1) S Screw Adjust T Tamper Resistant Cap (71883) Code Range 3 4.8-2.7 (7-3 ) 1.4 (15 ) @ crack pressure, approximately.95 (.25 GPM) 1 6.9-69 (1-1 ) 34.5 (5 ) @ crack pressure, approximately.95 (.25 GPM) 2 6.9-138 (1-2 ) 69 (1 ) @ crack pressure, approximately.95 (.25 GPM) 3 13.8-27 (2-3 ) 13.5 (15 ) @ crack pressure, approximately.95 (.25 GPM) 5 13.8-345 (2-5 ) 172.4 (25 ) @ crack pressure, approximately.95 (.25 GPM) Code Seals / Kit No. Omit D -Ring / (SK1-3) N Nitrile / (SK1-3N) V Fluorocarbon / (SK1-3V) Optional Setting 1 i.e. 235 = 235 (Omit if standard setting is used) Setting Range: 1 to 5 All settings at crack pressure, approximately.95 (.25 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 4P 1/4 NPTF (B1-3-*4P) 6P 3/8 NPTF (B1-3-*6P) 8P 1/2 NPTF (B1-3-*8P) 6T SAE-6 (B1-3-*6T) 8T SAE-8 (B1-3-*8T) 6B 3/8 BSPG (B1-3-6B) 8B 1/2 BSPG (B1-3-*8B) * Add A for aluminum, omit for steel. Steel Body only. 9

Catalog HY15-351/US Information General Description Pilot Operated Reducing Valve. For additional information see Tips on pages 1-6. Pilot Operated Reducing Valve Series PRH122 Features Hardened, precision ground parts for durability High accuracy, pilot operation design Ball-type pilot for added stability All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Drain/Vent Reg. Specifications Rated Maximum Inlet 113.7 (3 GPM) 38 (55 ) Performance Curve vs. ( rise through cartridge only) 6 414 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting 35 (5 ) 5 345 Maximum Tank Maximum Drain Cartridge Material Operating Temp. Range (Ambient) Fluid Compatibility/ Viscosity 35 (5 ) 1.9 (.5 GPM) All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.27 kg (.6 lbs.) Cavity C12-3 (See Section for more details) Form Tool Rougher NFT12-3R Finisher NFT12-3F 4 276 3 27 2 138 1 69 19. 37.9 56.9 GPM 75.9 5 1 15 2 (Q) 94.8 25 113.7 3 91

Catalog HY15-351/US Pilot Operated Reducing Valve Series PRH122 Information Dimensions Millimeters (Inches) 38.1 (1.5) Dia. Knob 36. (1.42) 37.7 (1.48) 39.6 (1.56) 38.9 (1.53) 1-1/16-12 UNF-2A Thread 1-1/4" Hex. 76 Nm (56 lb. ft.) 57.9 (2.28) Screw/Knob Version Ø 22.2 (.87) Fixed Cap/Tamper Resistant Version THIRD-ANG PROJECTION Ordering Information PRH122 12 Size P.O. Reducing Valve Style Range Seals Optional Setting Body Material Port Size Code Style / Kit No. Code Seals / Kit No. F Fixed style, preset at factory. Omit Nitrile / (SK12-3) K Knob Adjust (717784-15) V Fluorocarbon / (SK12-3V) S Screw Adjust T Tamper Resistant Cap (717785) Optional Setting Code Range 1 6.9-69 (1-1 ) 34.5 (5 ) @ 11.3 (3 GPM) 2 13.8-138 (2-2 ) 69 (1 ) @ 11.3 (3 GPM) 3 2.7-27 (3-3 ) 13.5 (15 ) @ 11.3 (3 GPM) 5 34.5-345 (5-5 ) 172.4 (25 ) @ 11.3 (3 GPM) 1 i.e. 235 = 235 (Omit is standard setting is used) Setting Range: 1 to 5 All settings at 11.3 (3 GPM) Code Body Material Omit Steel A Aluminum Code Port Size Body Part No. Omit Cartridge Only 8T SAE-8 (B12-3-*8T) 12T SAE-12 (B12-3-*12T) 8B 1/2 BSPG (B12-3-8B) * Add A for aluminum, omit for steel. Steel Body only. 92

Catalog HY15-351/US Information General Description Pilot Operated Reducing Valve. For additional information see Tips on pages 1-6. Pilot Operated Reducing Valve Series PRH162 Features Hardened, precision ground parts for durability High accuracy, pilot operation design Ball-type pilot for added stability All external parts have yellow zinc dichromate. This coating is ideal for salt spray applications. Drain/Vent Reg. Specifications Rated Maximum Inlet 15 (4 GPM) 38 (55 ) Performance Curve vs. ( rise through cartridge only) 6 414 Hydraulic Oil 15 SSU @ 1 F (32 cst) Maximum Setting Maximum Tank Maximum Drain Cartridge Material Operating Temp. Range/Seals Fluid Campatibility/ Viscosity 35 (5 ) 35 (5 ).94 (.25 GPM) All parts steel. All operating parts hardened steel. -4 C to +93.3 C (Nitrile) (-4 F to +2 F) -31.7 C to +121.1 C (Fluorocarbon) (-25 F to +25 F) Mineral-based or synthetic with lubricating properties at viscosities of 45 to 2 SSU (6 to 42 cst) Filtration ISO Code 16/13, SAE Class 4 or better Approx. Weight.9 kg (2. lbs.) Cavity C16-3 (See Section for more details) Form Tool Rougher NTF16-3R Finisher NFT16-3F 5 345 4 276 3 27 2 138 1 69 37.8 75.8 GPM 113.4 1 2 3 (Q) 151.6 4 93