Type EZR Relief Valve or Backpressure Regulator

Transcription

1 Type EZR Relief Valve Backpressure Regulat 03/0 Internally Actuated Quiet Operation Exceptional Design Thoughly Tested Robust Construction W7393, 2, 3, 4 and 6-inch (DN 25, 50, 80, and 50) Body Sizes Patent Numbers 5,964,446 and 6,02,07 Additional Patents Pending D02627X02 Regulats

2 Features Easy In-Line Maintenance Top-entry design reduces maintenance time. Trim parts can be inspected, cleaned, and replaced without removing the body from the pipeline. No special alignment is required when replacing the diaphragm. The Type EZR incpates Fisher E-body construction, making it easy change out existing Fisher E-body relief valves and backpressure regulats with a Type EZR trim kit. W7398 INDICATOR PROTECTOR TYPE EZR TRIM PACKAGE Quiet Operation The specially engineered flow path reduces operational noise, making the Type EZR exceptionally quiet. HEX NUTS CAP SCREWS INDICATOR COVER O-Ring Design The Type EZR uses elasmer O- rings instead of gaskets, reducing maintenance and assembly time. BONNET O-RING INDICATOR WASHER INDICATOR FITING Versatility By changing from a relief piloting system a pressure reducing piloting system, a Type EZR relief valve backpressure regulat easily becomes a pressure reducing regulat. MAIN SPRING DIAPHRAGM AND PLUG ASSEMBLY STEM O-RING CAGE Long Life The robust design of the Type EZR with its metal plug and specially engineered flow path allows flow through the regulat without seat impingement. The diaphragm design eliminates the possibility of taking a "set", a common problem with boot-style regulats. To prevent damage, the diaphragm is fully suppted in both the open and closed positions. These features enable the Type EZR components wk longer with less wear. O-RING INLET STRAINER Full Usable Capacity Fisher relief valves and backpressure regulats are labaty tested. percent of the published capacities can be used with confidence. B265 MAIN VALVE BODY (E-BODY) 2

3 INDICATOR COVER INDICATOR FITTING HEX NUTS UPPER SPRING SEAT INDICATOR STEM MAIN SPRING O-RING Fast Pilot Reseat The fixed restriction in the Type 6358B, 6358EB, and 6358EBH pilots allows the valve plug quickly reseat after operation. W70_ INDICATOR WASHER INDICATOR O-RING BACKUP RINGS TRAVEL INDICATOR ASSEMBLY WASHER (6-INCH SIZE ONLY) Though Labaty Testing Fisher's state-of-the-art flow labaty allows though testing of all new designs. Fisher conducts perfmance tests such as flow, shuff, material compatibility, and noise abatement. Tight Shuff The Type EZR uses a diaphragm and metal plug, eliminating the disadvantages of the boot-style relief valves and backpressure regulats. When open, the metal plug deflects particles and debris away from the diaphragm. The result is enhanced resistance particle erosion which provides excellent shuff over an extended life. When closed, loading pressure and the main spring push the diaphragm on the knife edged seat on the cage maintain tight shuff. Debris Protection The specially engineered flow path, along with the metal plug, allow flow through the body without seat impingement. Diaphragm Top Plug Botm Plug Powder Paint Coating Fisher products are powder paint coated, offering impact, abrasion, and crosion resistance. W7394 O-Ring O-Ring O-Ring Flanged Locknut DIAPHRAGM AND PLUG ASSEMBLY Introduction The Type EZR pilot-operated, pressure relief valve backpressure regulat is typically used in city gate and district stations as a relief valve f overpressure protection, in commercial and industrial applications as a backpressure regulat. The Type EZR provides smooth, quiet operation, tight shuff, and long life, even in dirty service. Its internally actuated metal plug eliminates disadvantages associated with boot-style relief valves and backpressure regulats. The specially engineered flow path deflects debris, protecting the seat from damage and erosion. The Type EZR relief valve backpressure regulat can be converted a pressure reducing regulat simply by changing a pressure reducing piloting system (see Bulletin 7.2:EZR). 3

4 Specifications Main Valve Body Sizes, End Connection Styles, and Body Ratings () See table Maximum Relief (Inlet) Pressure () See tables 2 and 6 Minimum Relief Set Pressure (2) psig (,4 bar) Set Pressure Ranges See table 2 Main Valve Flow Coefficients See table 8 Diaphragm Selection () See tables 4, 5, and 6 Reseat Pressures See table 7 Main Valve Flow Direction Up through the center of the cage down through cage slots Typical Main Valve Flow Capacities See table 9; and Capacity Infmation Main Valve Flow Characteristics Linear Noise Infmation See the Noise Abatement Technology section Pressure Registration External through upstream control line Upstream Control Line Connection /4-inch NPT screwed in pilot body Pilot Spring Case Vent Connection /4-inch NPT screwed tapping Temperature Capabilities () See table 5 Approximate Weights See table 0 Options Prepiped Pilot Supply and Pilot Bleed Travel Indicat Inlet Strainer Type 252 Pilot Supply Filter Trim Package Quick Disconnect Union in Pilot Mounting Construction Materials Type EZR Main Valve Body: Cast iron WCB steel Bonnet: LF2 Steel Bonnet Bushing: S4600 Stainless steel Cage: 5-5 Stainless steel Spring: Zinc-plated steel (green spring) 7-7 stainless steel (red spring) Top Plug: 7-4 Stainless steel Botm Plug: S4600 Stainless steel Inlet Strainer: S3600 Stainless steel Strainer Replacement Shim: 8-8 Stainless steel Diaphragm: Nitrile (NBR) fluoelasmer (FKM) O-Rings: Nitrile (NBR) fluoelasmer (FKM) Flanged Locknut: Zinc-plated steel Backup Rings: Teflon (PTFE) Upper Spring Seat: S4600 Stainless steel Stem: S30300 Stainless steel Indicat Protect and Cover: Plastic Indicat Fitting: S4600 Stainless steel Travel Indicat Plug: S4600 Stainless steel 6358 Series Pilots Body: CF8M Stainless steel Spring Case: CF8M Stainless steel Body Plug: S30300 Stainless steel Valve Plug: Nitrile (NBR) fluoelasmer (FKM) plug with stainless steel stem Spring: Zinc-plated steel Diaphragm: Nitrile (NBR) fluoelasmer (FKM) Spring Seat: Zinc-plated steel Stem Guide: Stainless steel Adjusting Screw: Zinc-plated steel O-Rings: Nitrile (NBR) fluoelasmer (FKM) Lower Seat: Thermoplastic Diaphragm Limiter: Stainless steel Type 252 Pilot Supply Filter Body: Aluminum stainless steel Filter Cartridge: Polyethylene Upper and Lower Seats: Delrin (3) Drain Valve Pipe Plug: S3600 Stainless steel O-ring: Nitrile (NBR) Mounting Parts Pilot Mounting Pipe Nipple: Plated steel Tubing: Stainless steel Fittings: Stainless steel. The pressure/temperature limits in this bulletin and any applicable standard code limitation should not be exceeded. 2. Set pressure is defined as the pressure at which the pilot starts discharge. 3. Trademark of E.I. dupont de Nemours Co. 4

5 Table. Main Valve Body Sizes, End Connection Styles, and Structural Design Ratings () MAIN VALVE BODY SIZE 2, 3, 4, and 6-inch (DN 50, 80,, and 50), 2, 3, 4, and 6-inch (DN 25, 50, 80,, and 50) MAIN VALVE BODY MATERIAL Cast iron WCB Steel E ND CONNECTION STYLES( ) S TRUCTURAL DESIGN RATING(2) N PT (2-inch only) 0 psig (27,6 bar) A NSI Class 25B FF 0 psig (3,8 bar) A NSI Class 250B RF psig (34,5 bar) N PT SWE ( and 2-inch only) 480 psig (02 bar) A NSI Class 50 RF 285 psig (9,6 bar) A NSI Class 300 RF 7 psig (5,0 bar) A NSI Class 600 RF BWE 480 psig (02 bar). Ratings and end connections f other than ANSI standard can usually be provided. Contact your Fisher Sales Representative Sales Office f assistance. 2. See tables 3, 5, 6, and 7 f diaphragm materials and additional pressure ratings. Table 2. Set Pressure Ranges, Pilot Pressure Ratings, and Pilot Infmation () PILOT TYPE 6358 and 6358B 6358EB 6358EBH RELIEF SET PRESSURE RANGE, PSIG ( b ar) (,4 2,8) (2,4 8,6) (5,2 9,7) (9,0 3,8) (2,4 24,) (7,3 3,0) ( 27,6 4,4) (2) Part Number E K B26X02 7B263X02 7B264X02 7B263X02 7B264X02 Col PILOT CONTROL INFORMATION Wire Diameter, Inches (cm) 0.48 (0,376) 0.87 (0,475) (0,572) (0,665) (0,747) (0,685) (0,747) Free Length, Inches (cm) (5,08) (5,56) Maximum Operating Pressure, Psig (bar) Maximum Emergency Pressure, Psig (bar) 50 ( 0,3) 50 (0,3) (9,) (9,78) ( 0,7) 650 ( 44,8) (5,7). See the Main Valve Body Sizes, End Connections, Structural Design Ratings tables, and the Main Valve Diaphragm and Spring Pressure Ratings table f additional pressure ratings. 2. Fluoelasmer diaphragms are limited 450 psig (3, bar). (9,78) (0,7) Table 3. Main Valve Minimum Differential Pressures () MAIN VALVE BODY SIZE, INCH (DN) (25) 2 (50) 3 (80) 4 () 6 (50) MAIN SPRING PART NUMBER AND COLOR MINIMUM DIFFERENTIAL, PERCENT OF CAGE CAPACITY, PSID ( b ar d) F 90% Capacity F % Capacity % Trim 60% Trim 30% Trim % Trim 60% Trim 30% Trim 9B2399X02, White ( 2) 9 (,3 ) 9 (,3) 22 (,5) 9 (,3) 24 (,7) 9BX02, Light 28 (,9) 28 (,9) 35 (2,4) 28 (,9) 28 (,9) 4 (2,8) 9B2X02, Black ( 3) (2,8 ) 4 (2,8) 47 (3,2) (2,8) 42 (2,9) 70 (4,8) 9B095X02, ( 2) 3 (0,9 ) 7 24 (,7) 3 (0,9) 7 24 (,7) 8B226X02, 6 (,) 2 (,5) 29 (2,0) 25 (,7) 30 (2,) 8B5955X02, ( 3) 23 (,6 ) 28 (,9) 30 (2,) 30 (2,) 3 (2,) 32 (2,2) T 484T002, ( 2) 4 (0,97 ) 4 (0,97) (,3) 9B078X02, Light 5 (,0) 5 (,0) (,5) 9B0782X02, Black ( 3) 26 (,8 ) 26 (,8) 27 (,8) 33 (2,3) 33 (2,3) 33 (2,3) T 484T002, ( 2) 0 (0,69 ) (0,76) 2 (0,83) 8 8B850X02, 4 (0,9) 5 (0,9) 7 22 (,5) 24 (,7) 24 (,7) 8B8502X02, ( 3) (,4 ) 24 (,7) 29 (2,0) 30 (2,) 30 (2,) 30 (2,) 9B0364X02, ( 2) 8 (0,6) 9 (0,6) 0 (0,69) 0 (0,69) 0 (0,69) 3 (0,9) 9B0366X02, 5 (,0) 5 (,0) 6 (,) 7 9 (,3) 9B0365X02, () 3 6 (, ) 8 (,3) 9 (,3) 24 (,7) 24 (,7). See table f structural design ratings, table 3 f pilot ratings, and table 7 f maximum pressure ratings. 2. The white and yellow springs are only recommended f inlet pressures under psig (6,9 bar). 3. The red and black springs are only recommended f inlet pressures over psig (34,5 bar). 5

6 INLET PRESSURE DIAPHRAGM AND PLUG ASSEMBLY LOADING PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE MAIN SPRING TYPE 6358EB PILOT W7350 Figure 3. Type EZR Operational Schematic Principle of Operation A pressure relief valve is a throttling pressure control device that opens ensure the upstream pressure does not rise above a predetermined pressure. A backpressure regulat is a device that controls and responds changes in the upstream pressure. It functions the same as a relief valve in that it opens on increasing upstream pressure. Fisher Type EZR relief valves cannot be used as ASME safety relief valves. Relief Valve As long as the inlet pressure is below the set pressure, the pilot control spring keeps the pilot valve plug closed. Inlet pressure passes through the pilot restriction and registers as loading pressure on p of the Type EZR diaphragm and plug assembly. Fce from the main spring, in addition inlet pressure bleeding through the pilot restriction, provide downward loading pressure keep the main valve diaphragm and plug assembly tightly shuff. When the inlet pressure rises above the set pressure, the pressure on the pilot diaphragm overcomes the pilot control spring and opens the pilot valve plug. The pilot then exhausts the loading pressure from the p of the main valve diaphragm and plug assembly. The inlet pressure unbalance overcomes the main spring fce and opens the diaphragm and plug assembly. The pilot continuously exhausts gas when the inlet pressure is above the set pressure. As the inlet pressure drops below the set pressure, the pilot control spring closes the pilot valve plug and the exhaust atmosphere sps. Fce from the main spring, along with pilot loading pressure, pushes the diaphragm and plug assembly on the knife edged seat, producing tight shuff. 6

7 HOLLOW PASSAGE IN VALVE PLUG STEM DIAPHRAGM ASSEMBLY HOLLOW PASSAGE IN VALVE PLUG STEM DIAPHRAGM ASSEMBLY UPPER PORTION OF VALVE PLUG FIXED RESTRICTION UPPER PORTION OF VALVE PLUG RESTRICTION PLUG LOWER PORTION OF VALVE PLUG TO MAIN VALVE DIAPHRAGM TO EXHAUST PORT LOWER PORTION OF VALVE PLUG TO MAIN VALVE DIAPHRAGM TO EXHAUST PORT LOADING PRESSURE OUTLET PRESSURE LOADING PRESSURE OUTLET PRESSURE EXPANDED VIEW OF THE TYPE 6358B RELIEF PILOT DIAPHRAGM ASSEMBLY AND VALVE PLUG Figure 4. Type 6358B Operational Schematic EXPANDED VIEW OF THE TYPE 6358 BACKPRESSURE PILOT DIAPHRAGM ASSEMBLY AND VALVE PLUG Figure 5. Type 6358 Operational Schematic Backpressure Regulat As long as inlet pressure remains below setpoint, the pilot control spring keeps the pilot valve plug closed. Inlet pressure passes through the upper pt around the upper ption of the valve plug and then through the hollow passage in that valve plug. Fce from the main spring, in addition inlet pressure bleeding through the pilot, provides downward loading pressure keep the main valve diaphragm and plug assembly tightly shut off. When inlet pressure rises above the set pressure, pressure on the pilot diaphragm overcomes the control spring close the upper pt and stroke the valve plug open the lower pt. The pilot then exhausts loading pressure from the p of the main valve diaphragm and lets inlet pressure unbalance overcome the main spring fce open the main valve diaphragm and plug assembly. While the main valve is throttling, the upper pt of the pilot stays closed. The pilot exhausts only when it repositions the main valve. As inlet pressure drops below setpoint, the pilot control spring overcomes the diaphragm fce stroke the valve plug down close the lower pt and open the upper pt. Fce from the main spring, along with pilot loading pressure, pushes the diaphragm and plug assembly on the knife edged seat, producing tight shuff. Pilot Descriptions The following pilot configurations are available f the Type EZR relief valve backpressure regulat. Relief Valve The Type EZR relief valve uses the Types 6358B, 6358EB, and 6358EBH relief pilots. The pilot bleeds constantly while the relief valve is in operation. The pilot does not bleed when inlet pressure is below set pressure. The pilot exhaust can be connected directly the main valve exhaust pipe if the pilot connection and the exhaust pipe are designed prevent significant backpressure buildup during full-flow conditions. The pilot restriction code is indicated by a letter stamped on the botm of the pilot body: an H f the yellow, small-diameter, high gain restriction (standard); S f the red, medium diameter, medium gain restriction; and L f the blue, large-diameter, low gain restriction. The high gain restriction has the lowest buildups and fastest speed of response. Type 6358B Set pressure range from 25 psig (,4 8,6 bar) in two ranges. This pilot is available with a high, medium, low gain restriction. Type 6358EB Set pressure range of psig (5,2 24, bar) in three ranges. To acheive higher 7

8 pressures and accuracy, this pilot has an extended spring case accommodate longer springs. This pilot is available with a high low gain restriction. Type 6358EBH The high pressure version of the Type 6358EB pilot with a set pressure range of psig (7,2 4,4 bar) in two ranges. This pilot is available with a high low gain restriction. Backpressure Regulat The Type 6358 is a low bleed pilot, so it only exhausts while it is repositioning the main valve. There is no constant bleed with this construction. This minimizes dirt buildup in the pilot. The Type 6358 has a set pressure range of 25 psig (,4 8,6 bar) in two ranges. The Types 6358B, 6358EB, and 6358EBH pilots can also be used in backpressure applications. Pilot exhaust can be piped in the downstream system on applications requiring no bleed. Optional Travel Indicat The travel indicat responds with the precise movement of the diaphragm and plug assembly show actual valve position. A travel indicat can be used f in-line inspection and troubleshooting, remote stem positioning, and alarming. Optional Inlet Strainer The stainless steel inlet strainer is designed with holes smaller than the cage slots prevent pipeline debris from becoming trapped in the main valve body. Once trapped in the body, the debris can clog the cage slot affecting shuff perfmance. An inlet strainer is typically not used in relief applications because debris clogging the strainer can restrict the flow. Optional Pilot Supply Filter The Type 252 pilot supply filter prevents pipeline debris from entering the pilot; a primary cause of pilot clogging. The aluminum body is rated f 250 psig (48 bar) and the stainless steel body f 2 psig (90 bar). Both are available in standard extended length with a pipe plug a drain valve. When the upstream system is free of debris, the Type EZR may be installed without a filter. A pilot supply filter is not typically used in relief applications because filter plugging may hamper pilot operation. Capacity Infmation Table 9 shows the natural gas relief capacities of the Type EZR relief valve backpressure regulat at selected inlet pressures and outlet pressure settings. Flows are in scfh (at 60 F and 4.7 psia) and m 3 /h(n) (at 0 C and,0325 bar) of 0.6 specific gravity natural gas. To determine equivalent capacities f air, propane, butane, nitrogen, multiply the capacity by the following appropriate conversion fact: f air, f propane, f butane, f nitrogen. F gases of other specific gravities, multiply the given capacity by 0.775, and divide by the square root of the appropriate specific gravity. To find approximate relief capacities at set pressures buildups not given in table 7 9, use one of the following fmulas and, if necessary, convert accding the facts in the paragraph above. Then, if capacity is desired in nmal cubic meters per hour at 0 C and,0325 bar, multiply scfh by Critical Pressure Drops F critical pressure drops (absolute outlet pressure equal less than one-half of absolute inlet pressure), use the following fmula: Q = ( P + Buildup) abs C g Non-Critical Pressure Drops 5 GT F pressure drops lower than critical (absolute outlet pressure greater than one-half of absolute inlet pressure), use the following fmula: P Q = C g ( P + Buildup) abs SIN GT C P Deg. where, Q = flow capacity in scfh G = specific gravity of gas T = absolute temperature of gas at inlet in degrees Rankine C g = gas sizing coefficient from table 8 P abs = absolute inlet pressure in psia (P gauge + 4.7) C = C g /C v from table 8 P = pressure drop across the valve in psig 8

9 STYLE (IMPRINT) MATERIAL (IMPRINT) MATERIAL (INK MARK) Table 4. Diaphragm Imprint Codes Imprint STYLE Ink Mark 2 30 MATERIA L Imprint Ink Mark 7E67 2 7E68 4 7E88 5 7E97 DIAPHRAGM MATERIALS 7E67 - Nitrile (NBR) (distribution low pressure industrial) 7E68 - Nitrile (NBR) (low temperature) 7E88 - Fluoelasmer (FKM) (high aromatic hydrocarbon content resistance) 7E97 - Nitrile (NBR) (high-pressure and/ erosion resistance) DOME IDENTIFICATION STYLE (INK MARK) (MAY BE IN EITHER LOCATION) Figure 6. Diaphragm Markings Table 5. Diaphragm Temperature Capabilities, Erosion Resistance, and Chemical Compatibility Gas Temperature (f lower temperatures contact your local Sales Office Representative) General Applications Heavy Particle Erosion Natural Gas With: 7E67 NITRILE (NBR) 7E68 NITRILE (NBR) 7E97 NITRILE (NBR) 7E88 FLUOROELASTOMER (FKM) 0 50 F (-7 66 C) - 50 F ( C) 0 50 F (-7 66 C) F (-7 2 C) () Best f low medium pressure conditions, such as distribution service low medium pressure industrial service. Up 3% aromatic h ydrocarbon content( 2) Excellent 3-5% aromatic h ydrocarbon content( 2) 5-50% aromatic h ydrocarbon content( 2) Not recommende d Up 3% H2S (hydroge n sulfide sour gas) Up 3% kene Up 0% alcohol Up 3% synthetic lube Best f cold temperatures. Po Not recommende d. F differential pressures above 0 psig (27,6 bar) diaphragm temperature is limited 50 F (66 C). 2. The aromatic hydrocarbon content is based on percent volume. Best f high pressure conditions, i.e. transmission service high pressure industrial service. It is also the best f abrasive erosive service applications. Excellent Excellent Po Best f natural gas having aromatic hydrocarbons. It is also the best f high temperature applications. Excellent Excellent Excellent 9

10 Table 6. Main Valve Maximum Pressures, Diaphragm Selection Infmation, and Main Spring Selection () BODY SIZE, INCHES (DN) (25) 2 (50) 3 (80) 4 () DIAPHRAGM MATERIAL 7E68 Nitrile (NBR) Low temperature 7E97 Nitrile (NBR) High-pressure and/ erosion resistance 7E88 Fluoelasmer (FKM) High aromatic hydrocarbon content resistance 7E67 Nitrile (NBR) Distribution and low pressure industrial 7E68 Nitrile (NBR) Low temperature 7E97 Nitrile (NBR) High-pressure and/ erosion resistance 7E88 Fluoelasmer (FKM) High aromatic hydrocarbon content resistance 7E67 Nitrile (NBR) Distribution and low pressure industrial 7E68 Nitrile (NBR) Low temperature 7E97 Nitrile (NBR) High-pressure and/ erosion resistance 7E88 Fluoelasmer (FKM) High aromatic hydrocarbon content resistance 7E67 Nitrile (NBR) Distribution and low pressure industrial 7E68 Nitrile (NBR) Low temperature 7E97 Nitrile (NBR) High-pressure and/ erosion resistance 7E88 Fluoelasmer (FKM) High aromatic hydrocarbon content resistance 7E68 Nitrile (NBR) Low temperature MAXIMUM OPERATING INLET PRESSURE MAXIMUM OPERATING DIFFERENTIAL PRESSURE MAXIMUM EMERGENCY INLET AND DIFFER-ENTIAL PRESSURE MAIN SPRING COLOR psig (6,9 bar) White 460 psig (3,7 bar) 0 psid (27,5 bar d) 460 psid (3,7 bar d) Light psig (34,5 bar) Light psig (72,4 bar) 800 psig (55,2 bar d) B lack(2) psig (34,5 bar) ( 3) psid (5,7 bar d ) Light psig (5,7 bar) ( 3) psid (5,7 bar d ) B lack(2) psig (6,9 bar) psig (34,5 bar) psid (5,7 bar d) psig (6,9 bar) 460 psig (3,7 bar) 0 psid (27,5 bar d) 460 psid (3,7 bar d) psig (34,5 bar) psig (72,4 bar) 800 psid (55,2 bar d) R ed(2) psig (34,5 bar) ( 3) psid (5,7 bar d ) psig (5,7 bar) ( 3) psid (5,7 bar d ) R ed(2) psig (6,9 bar) 360 psig (24,8 bar) 300 psid (,7 bar d) psid (5,7 bar d) Light psig (6,9 bar) 360 psig (24,8 bar) 300 psid (,7 bar d) Light psig (34,5 bar) Light psig (72,4 bar) 800 psid (55,2 bar d) B lack(2) psig (34,5 bar) ( 3) psid (5,7 bar d ) Light psig (5,7 bar) ( 3) psid (5,7 bar d ) B lack(2) psig (6,9 bar) 360 psig (24,8 bar) 300 psid (,7 bar d) psid (5,7 bar d) psig (6,9 bar) 360 psig (24,8 bar) 300 psid (,7 bar d) psig (34,5 bar) psig (72,4 bar) 800 psid (55,2 bar d) R ed(2) psig (34,5 bar) ( 3) psid (5,7 bar d ) psig (5,7 bar) ( 3) psid (5,7 bar d ) R ed(2) psig (6,9 bar) 360 psig (24,8 bar) 300 psid (,7 bar d) 7E97 Nitrile (NBR) psig (34,5 bar) 6 (50) High-pressure and/ erosion resistance psig (72,4 bar) 800 psid (55,2 bar d) R ed(2) 7E88 Fluoelasmer (FKM) psig (34,5 bar) 3) psid (5,7 bar d ) High aromatic hydrocarbon content resistance psig (5,7 bar) 3) psid (5,7 bar d ) R ed(2). See table f main valve structural design ratings and table 3 f pilot ratings. 2. The red and black springs are recommended f applications where the maximum inlet pressures can exceed psig (34,5 bar). 3. F differential pressures above 0 psid (27,6 bar d) diaphragm temperatures are limited 50 F (66 C). DIAPHRAGM STYLE

11 PILOT TYPE SET PRESSURE SPRING RANGE, PART NUMBER, AND COLOR, SIG ( P r a b ) MAIN VALVE SPRING COLOR ET PRESSURE S ) (, SIG ( P r a b ) BUILDUP OVER SET PRESSURE NEEDED TO BEGIN OPENING AIN VALVE M ) 2 (, SIG ( P r a b ) BUILDUP OVER SET PRESSURE NEEDED TO FULLY OPEN AIN VALVE M ) 3 (, SIG ( P r a b ) PRESSURE DROP BELOW SET PRESSURE NEEDED TO RESEAT PILOT, SIG ( P r a b ) ,8) (,4 E (,7) (2,) (2,8) ,6) (2,4 K (2,8) (4,) (5,5) (6,9) (8,6) (0,0) (0,0) (0,0) (0,) (0,) (0,7) (0,7) (0,9) 6358B 2,8) (,4 E (,7) (2,) (2,8) ,6) (2,4 K (2,8) (4,) (5,5) (6,9) (8,6) (0,0) (0,0) (0,0) (0,) (0,) (0,7) (0,7) (0,9) 6358EB 75 9,7) (5,2 7B26X (5,2) (6,9) (8,6) (9,7) (0,2) (0,2) (0,7) (0,24) (0,28) ,8) (9,0 7B263X (9,7) (0,3) (2,) (3,8) (0,24) (0,3) (0,38) (0,45) (0,52) ,2) (2,4 7B264X (3,8) (5,5) (7,2) (9,0) (,7) (22,4) (24,) (0,38) (0,38) (0,38) (0,38) (0,55) (0,55) (0,59) (0,59) (0,59) (0,62) (0,62) 6358EBH ) (4 3,0) 7,2 ( ) (4 7B263X (24,) (25,9) (27,6) (29,3) (3,0) (0,45) (0,48) (0,52) (0,66) (0,66) (0,69) (0,72) (0,76) ) (4 4,4) 27,6 ( ) (4 7B264X02 Black Black Black (3,0) (34,5) (37,9) (4,4) (0,52) (0,55) (0,59) (0,62) (0,79) (0,83) (0,90) (0,97) discharge. starts pilot the which at pressure the as defined is pressure Set. flow. audible starts valve main the which at pressure set the over buildup pressure inlet the valve main the of pressure point Crack 2. flow capacity. wide-open achieve valve main the f pressure set the over buildup pressure Inlet 3. bar). (3,0 psig 450 limited is diaphragms pilot fluoelasmer f pressure maximum operating The 4. Table 7. Pilot Infmation

12 Table 8. Main Valve Flow Coefficients () MAIN VALVE BODY SIZE, INCH (DN) -inch (25) 2-inch (50) 3-inch (80) 4-inch () 6-inch (50) CAGE STYLE, PERCENT OF CAPACITY % 60% 30% % 60% 30% % 60% 30% % 60% 30% % 60% 30% LINE SIZE EQUALS BODY SIZE PIPING With Inlet Strainer ,600 7, 3, Without Inlet Strainer ,000 7,0 3, : LINE SIZE TO BODY SIZE PIPING With Inlet Strainer ,0 7,50 3,570 Without Inlet Strainer C g C v C C g C v C C g C v C C g C v C ,700 7,230 3,590. Km f the -inch (DN 25) body size at % capacity is 0.88, the 2-inch (DN 50) is 0.92, the 3-inch (DN 80) is 0.94, the 4-inch (DN ) is 0.84, and the 6-inch (DN 50) is Table 9. Capacities SET PRESSURE RANGE, SPRING PART NUMBER, AND COLOR, PSIG ( b ar) (,4 2,8) E , (2,4 8,6) K , 75 (5,2 9,7) 7B26X02, 30 0 (9,0 3,8) 7B263X02, (2,4 24,2) 7B264X02, ( 7,2 3,0) (2) 7B263X02, ( 27,6 4,4) (2) 7B264X02, SET P RESSURE ( ), PSIG ( b ar) (,7) (2,) (2,8) (2,8) (4,) (5,5) (6,9) (8,6) (5,2) (6,9) (8,6) (9,7) (9,7) (0,3) (2,) (3,8) (3,8) (5,5) (7,2) (9,0) (,7) (22,4) (24,) (24,) (25,9) (27,6) (29,3) (3,0) (3,0) (34,5) (37,9) (4,4) CAPACITIES IN THOUSANDS OF SCFH ( m 3 / h( n)) OF 0.6 SPECIFIC GRAVITY NATURAL GAS WITH 2: LINE SIZE TO BODY SIZE PIPING AND WITHOUT INLET STRAINER -inch (DN 25) 2 -inch (DN 50) 3 -inch (DN 80) 4 -inch (DN ) 6-inch (DN 50) 24 (0,6) 27 (0,7) 3 (0,8) 38 (,0) 38 (,0) (,8) 8 (2,2) 99 (2,7) 63 (,7) 8 (2,2) 99 (2,7) 0 (2,9) (2,9) (3,) (3,6) (4,) (4,) (4,6) (5,2) (5,7) (6,2) (6,8) (7,3) (7,3) (7,8) (8,4) (8,9) (9,5) (9,5) (0,7) (,8) (3,0) 87 (2,33) 99 (2,65) (2,98) 35 (3,62) (3,75) 83 (4,92) 23 (6,2) 279 (7,50) 339 (9,09) (5,9) (7,50) (9,2) (0,) (0,2) (0,8) (2,5) (4,2) (4,2) (5,8) (7,4) (9,0) (,6) (22,2) (23,8) (23,8) (25,4) (27,) (28,7) (30,3) 30 (30,3) 250 (33,6) 37 (36,8) 492 (,). Set pressure is defined as the pressure at which the pilot starts discharge. 2. The maximum operating pressure f fluoelasmer pilot diaphragms is limited 450 psig (3,0 bar). 66 (4,45) 89 (5,07) 2 (5,66) 257 (6,89) 267 (7,6) 350 (9,38) 44 (,8) 533 (4,3) 646 (7,3) (0,3) (4,3) (7,4) (9,3) 723 (9,4) 77 (,7) 888 (23,8) 6 (27,0) (27,0) (30,0) (33,2) (36,2) (39,2) (42,3) (45,3) (45,5) (48,5) (5,5) (54,6) (57,7) (57,8) (63,7) (70,) (76,3) (7,6) (8,2) (9,) (,) (,5) (5,) (9,0) (22,9) (27,8) (8,0) (22,9) (27,9) (3,0) (3,) (33,2) (38,2) (43,3) 6 (43,4) 802 (48,3) 988 (53,3) 270 (58,2) 235 (63,0) 2537 (68,0) 279 (72,9) 2732 (73,0) 2904 (77,8) 3090 (82,8) 3275 (87,8) 346 (92,8) (92,9) (03) (3) (23) (3,3) (5,4) (5,0) (2,6) (2,6) (29,5) (37,3) (44,9) (54,4) (34,4) (44,9) (54,4) (60,0) (60,0) (63,6) (72,8) (8,8) (8 8) (90 6) (99 4) (08) (6) (25) (33) (33) (4) (49) (57) (65) (65) (79) (94) (8) 2

13 E G R (TRIM REMOVAL CLEARANCE) C (INDICATOR COVER REMOVAL CLEARANCE) /4-INCH NPT PILOT EXHAUST CONNECTION WITH REMOVABLE VENT /4-INCH NPT UPSTREAM CONTROL LINE CONNECTION D A/2 /4-INCH NPT PILOT EXHAUST CONNECTION WITH REMOVABLE VENT B8_ A BODY SIZE, INCHES (DN) SWE NPT 25B FF 50 RF A 250B 300 RF 600 RF BWE C D ( M AX) E G R (25) 8.25 (20) 7.25 (84) 7.75 (97) 8.25 (20) 2.00 (5) 2.38 (60) 7.44 (76) 8.65 (2) 9.87 (25) 2 (50).25 (286) 0.00 (254) 0.50 (267).25 (286) 2.00 (5) 3.06 (78) 7.44 (76) 9 (229) (279) 3 (80) (298) 2.5 (37) 3.25 (337) 3.75 (95) 3.8 (97) 8.9 (8) 3.3 (338) 5.9 (50) 4 () (353) 4.5 (368) 5.5 (394) 3.75 (95) 5.06 (29) 8.45 (25) 4.7 (373).7 (526) 6 (50) (45) 8.6 (473).0 (508) 3.8 (95) 5.5 () 0.88 (276) 5.2 (386) 32.8 (579) Figure 7. Dimensions Table 0. Approximate Weights BODY SIZE, INCHES (DN) CAST IRON MAIN VALVE BODY, POUNDS NPT (KG) 25B FF 250B RF NPT, SWE, BWE WCB STEEL MAIN VALVE BODY, POUNDS (KG) 50 RF 300 RF 600 RF (25) 23 (0) 22 (0) 29 (3) 23 (0) 22 (0) 28 (3) 32 (5) 2 (50) 52 (24) 50 (23) 59 (27) 5 (23) 54 (25) 58 (26) 65 (30) 3 (80) () 06 (48) 03 (47) 07 (49) 0 (50) 23 (56) 4 () (63) 55 (70) 39 (63) 45 (66) 59 (72) 92 (87) 6 (50) (94) 225 (03) 0 (9) 20 (96) 235 (07) 350 (60). Add an additional 5 pounds (6,8 kg) get the weight with a 6AY Series pilot. 3

14 Installation Not all codes regulations permit a Type EZR relief valve be used as a final overpressure protection device. Make sure the installation will comply with all applicable codes and regulations. A Type EZR relief valve backpressure regulat may be installed in any ientation as long as flow through the body matches the flow arrow on the main valve. An upstream control line must be installed in the /4-inch NPT pt on the pilot body. If system operation is necessary during maintenance, install block and vent valves as needed. Ordering Infmation Refer the Specifications on page 4. Carefully review each specification then complete the Ordering Guide on pages 4 and 5 and send it your Fisher Sales Representative Sales Office. If not otherwise specified, the pilot is facty set in the middle of the set pressure range. NONRESTRICTIVE VENTS AND PIPING TYPE EZR MAIN VALVE ALTERNATE PILOT EXHAUST PIPING PILOT CONTROL LINE BLOCK VALVE ALTERNATE CONTROL LINE HAND VALVE MAIN PRESSURE LINE RELIEF PRESSURE CONTROL BLOCK VALVE TYPE EZR MAIN VALVE BLOCK VALVE CONTROL LINE PILOT B265 ALTERNATE PILOT EXHAUST PIPING BACKPRESSURE CONTROL Figure 8. Optional Installation Schematics 4

15 Ordering Guide Main Valve Body Size (Select) -Inch (DN 25) (Available in steel only*** 2-Inch (DN 50)*** 3-Inch (DN 80)*** 4-Inch (DN )*** 6-Inch (DN 50)*** Main Valve Body Material and End Connection Style (Select One) Cast Iron Body NPT (2-inch body size only)*** 25B FF*** 250B RF*** WCB Steel Body NPT ( 2-inch body size only)*** 50 RF*** 300 RF*** 600 RF*** SWE ( 2-inch body size only)* BWE ** BWE 80* PN 6/25/* specify Main Valve Main Spring (Select One) -inch (DN 25) Main Valve White, f inlet pressures under psig (6,9 bar)*** Light, f inlet pressures up psig (34,5 bar)*** Black, f inlet pressures over psig (34,5 bar)*** 2-inch (DN 50) Main Valve, f inlet pressures under psig (6,9 bar)***, f inlet pressures up psig (34,5 bar)***, f inlet pressures over psig (34,5 bar)*** 3-inch (DN 80) Main Valve, f inlet pressures under psig (6,9 bar)*** Light, f inlet pressures up psig (34,5 bar)*** Black, f inlet pressures over psig (34,5 bar)*** 4-inch (DN ) Main Valve, f inlet pressures under psig (6,9 bar)***, f inlet pressures up psig (34,5 bar)***, f inlet pressures over psig (34,5 bar)*** 6-inch (DN 50) Main Valve, f inlet pressures under psig (6,9 bar)***, f inlet pressures up psig (34,5 bar)***, f inlet pressures over psig (34,5 bar)*** Fisher Regulats Quick Order Guide * * * Standard - Readily Available f Shipment * * Non-Standard - Allow Additional Time f Shipment * Special Order, Constructed from Non-Scked Parts. Consult Your Fisher Sales Representative f Availability. Availability of the product being dered is determined by the component with the longest shipping time f the requested construction. Main Valve Diaphragm Material (Select One) 7E67 Nitrile (NBR)(standard)*** 7E68 Nitrile (NBR)(low temperature)*** 7E89 Nitrile (NBR)(high-pressure/erosion resistance)*** 7E88 Fluoelasmer (FKM)(high aromatic hydrocarbons)*** Main Valve O-Ring Material (Select One) Nitrile (NBR) (standard)*** Fluoelasmer (FKM)*** Inlet Strainer (Select One) No (standard)*** Yes*** Inlet Body Tap (Select One) No body tap* (standard)*** Inlet body tap only*** Inlet body tap with prepiped pilot supply*** Inlet and outlet body taps only*** Inlet and outlet body taps with prepiped pilot supply and pilot bleed*** Travel Indicat (Select One) No (standard)*** Yes*** Pilot Diaphragm and Valve Plug Material (Select One) Nitrile (NBR)(standard)*** Fluoelasmer (FKM)** Pilot O-Ring Material (Select One) Nitrile (NBR) (standard)*** Fluoelasmer (FKM)*** Pilot Mounting (Select One) Standard*** Quick Disconnect Union** Specification Wksheet Application: Specific Use Line Size Gas Type and Specific Gravity Gas Temperature Upstream Regulat Specifications: Brand of upstream regulat? Orifice size of the upstream regulat? Wide-open coefficient of the upstream regulat? Maximum Inlet Pressure (P max ) Downstream Pressure Setting(s) (P 2 ) Maximum Flow (Q max ) Relief Valve Specifications: Relief Valve Setpoint Accuracy Requirements? Need f Extremely Fast Response? Other Requirements: 5

16 Pilot Type and Outlet Pressure Range (Select One) 6358 psig (,4 2,8 bar)*** psig (2,4 8,6 bar)*** 6358B psig (,4 2,8 bar)*** psig (2,4 8,6 bar)*** 6358EB 75 psig (5,2 9,7 bar)*** 30 0 psig (9,0 3,8 bar)*** psig (2,4 24, bar)*** 6358EBH psig (7,2 3,0 bar)*** psig (27,6 4,4 bar)*** Type 252 Pilot Supply Filter (Optional) Material Stainless steel*** Aluminum** Length Standard*** Extended** Drain Valve Yes*** No** Trim Package (Optional) Yes, send one Type EZR trim package. (If dering replacement trim package f change-out of existing Fisher E-body a Type EZR, be sure mark selection of the following items on this page: body size, diaphragm material, inlet srainer option, and travel indicat option. If other components are required, they may be selected on this page.) Main Valve Replacement Parts Kit (Optional) Yes, send one diaphragm cartridge and O-rings parts kit match this der. Yes, send one diaphragm and O-rings parts kit match this der. Pilot Replacement Parts Kit (Optional) Yes, send one replacement parts kit match this der. Fisher Controls International, Inc., 999, 0; All Rights Reserved Fisher and Fisher Regulats are marks owned by Fisher Controls International, Inc. The Emerson logo is a trade mark and service mark of Emerson Electric Co. All other marks are the property of their respective owners. The contents of this publication are presented f infmational purposes only, and while every efft has been made ensure their accuracy, they are not be construed as warranties guarantees, express implied, regarding the products services described herein their use applicability. We reserve the right modify improve the designs specifications of such products at any time without notice. F infmation, contact Fisher Controls: Marshallwn, Iowa 5058 USA 283 Gallardon, France Sao Paulo Brazil Singape 2846 Printed in U.S.A. Regulats