Anderson Greenwood Series 5100 Pilot Operated Pressure Relief Valves

Transcription

1 ANDERSON GREENWOOD Series 5100 Modulating Safety Relief Valve Anderson Greenwood has developed the revolutionary Series 5100 specifically to serve Economizer applications requiring pressure relief under the stringent requirements of ASME Section I and Code Case This unique and challenging application requires premium performance on a valve that must have ASME Section I certified capacities for both steam and water. A modulating pilot operated pressure relief valve would be the ideal solution to this difficult application. Since the ASME Section I valve on an Economizer historically was certified only on steam, the valve would chatter when exposed to either water or flashing water service which is the typical real world scenario. Code Case 2446 was developed and approved to correct this situation. Instead of opening quickly (as occurs with a spring-loaded valve or a snapacting pilot operated valve), a modulating pilot operated valve would only open proportional to the specific overpressure need, thereby eliminating valve chatter. Anderson Greenwood Series 5100 was the first and is the ONLY non-flowing, modulating pilot operated pressure relief valve that is certified under ASME Section I. The Series 5100 is a unique soft seated pressure relief valve that requires no elastomer seats or seals. All plastic soft goods trim materials provide an economical way to handle high temperatures and aggressive lading fluids. This design provides an alternative to the traditional metal seated direct acting pressure relief valves used in these installations. The result is a modulating, soft-seated, pilot operated valve offering premium tightness with the ability to handle temperatures from -65 F to 515 F [-54 C to 268 C] and a set pressure range of 15 to 6170 psig [1.03 to barg]. The Series 5100 pilot is the latest technology from Anderson Greenwood. It is the first all plastic soft seat and sealed valve that operates as a nonflowing modulating pilot. There are no pilot component changes required to handle service conditions changing to and from steam and water. The soft seat in the Series 5100 main valve is more resistant to particulate damage than a metal seat, has a longer service life, and can be quickly replaced while the valve body remains installed in the line. Its unique design enables the main valve to be tight at pressures up to set point. After relieving and reseating, it stays bubble-tight, cycle after cycle. Flow Control Anderson Greenwood is registered trademark Tyco International Services AG or its affiliates in the United States and/or other countries. All other brand names, product names, or trademarks belong to their respective holders. Total Flow Control Solutions -US-0611

2 Specifications Features and Benefits Reduced Product Loss and Pollution. Soft seats for premium tightness before and after relief cycles. All Plastic Soft Goods. There are no elastomer seats or seals providing for chemical compatibility with corrosion inhibitors which may be found in feedwater service. Increased System Output. Because of total valve tightness to at least 96 percent of set pressure, the system can be operated closer to set pressure without valve leakage. The result is greater system production capability. Reduced Maintenance Costs. Resilient seats greatly extend service life. Costly and time consuming metal seat lapping is unnecessary. Balanced Design. Proper valve operation and lift are unaffected by back pressure. Costly and fragile metal bellows are not required. The Series 5100 pilot is exhausted to the outlet of the main valve with no effect on its set pressure. Dome Pressure Liner Piston Seal Wedge Ring Piston Piston Seal Seat ASME Section I Stamp. Certified National Board capacities for steam and water per Code Case 2446 assures the user of independent third party flow rate verification. Unique Field Set Capability. Allows accurate set pressure verification with valve in service. No system isolation valve or rupture disc is required. The unique Field Set also allows testing without risking damage to the valve. Reduced Noise. Modulating action minimizes flow and resultant noise during normal system upset reducing noise abatement costs. Non-flowing pilot. Minimizes entrance of dirt and formation of hydrates in the pilot. Due to low velocities within the pilot and supply tubing, most particles will drop out upstream of the pilot inlet screen. Ease of Adjustment. Single adjustment for set pressure allows for accurate and dependable testing. Rugged pilot mounting. Rigid, low profile bracket mounting protects against vibration and careless handling. Pilot Pilot Discharge Piped to Main Valve Outlet Dome Operation In normal operation, the system pressure acts on the area contained by the main valve seat at the bottom of the free-floating differential area piston and on the top of the piston. Since the top of the piston is larger than the bottom (seat area), there is a large downward net force holding the piston closed. Under static conditions, the seating force increases as the system pressure increases and approaches set point. Just prior to set pressure the pilot opens and partially depressurizes the dome. This reduces the force on the top of the piston. The set pressure is the point where the upward force on the main valve seat area can overcome the reduced downward loading. This causes the piston to lift, resulting in modulated flow through the main valve. As the main valve is relieving the flow through the pilot stops. When the relief demand has been satisfied, the pilot closes, full system pressure is diverted to the dome, and the piston moves downward, closing the main valve. A patented, pressure responsive piston drag system in the larger Series 5100 valves eliminates resonant chatter and the severe valve and/or piping damage it can cause. The wedge ring creates a pressure-actuated sliding friction force between the piston and liner, preventing resonant chatter. Specifications Durable but replaceable Teflon or PEEK seat in main valve, located on the piston to take the wear. A totally captive seat design eliminates seat extrusion at elevated temperatures. Teflon /PEEK seals throughout main valve and pilot for optimum chemical resistance, such as needed for various chemicals in boiler feed water. Single point set pressure adjustment. Field replaceable main valve nozzle. Non-flowing, all plastic seat/seals, pilot Unique Field Set, Lifting Lever and Pilot Supply Filter are standard accessories Note Teflon is a registered trademark of the E.I. dupont de Nemours Company. Sense Pickup 2

3 Specifications (continued) Down Force on Main Valve Piston 95% Set Pressure Minimum Main Valve Piston Lift 100% Lift Closing Opening 0 Set Set Pressure Pressure Sizing Effective API Orifice Area, in2 [cm2] Valve Size Type 5146 Type in [mm] 1 1 /2 x 2 [40 x 50] [8.516] /2 x 3 [40 x 80] ( H ) [5.065] 2 2 x 3 [50 x 80] ( J ) [8.303] [16.47] 3 2 x Dual 3 [50 x Dual 80] [16.47] 3 3 x 4 [80 x 100] ( L ) [18.41] [38.31] 3 3 x Dual 4[80 x Dual 100] [38.31] 3 4 x 6 [100 x 150] [61.21] 4 4 x Dual 6 [100 x Dual 150] [61.21] 4 6 x 8 [150 x 200] [137.7] 5 6 x Dual 8 [150 x Dual 200] [137.7] 5 8 x Dual 8 [150 x Dual 200] [182.9] 5 8 x 10 [200 x 250] [251.3] 5 8 x Dual 10 [200 x Dual 250] [251.3] 5 Notes 1. There are no recognized API full-bore orifice areas. These effective areas are specific to Anderson Greenwood. 2. Set pressure range psi 3. Set pressure range psi 4. Set pressure range psi 5. Set pressure range psi 3

4 Standard Main Valve - Materials of Construction /S1-65 F to +515 F Item Description [-54 C to +268 C] 1 Body SA216-WCB/WCC CS 2 Piston A (17-4 PH), A or A351-CF8M SS 3 Liner A or A351-CF8M 4 Nozzle A or A351-CF8M SS 5 Seat Teflon 6 Seat Retainer A SS 7 Seat Retainer Bolt 316 SS 8 Cap SA Dipper Tube 17-4 PH SS 10 Piston Seal Teflon 11 Nozzle Seal Filled Teflon 12 Liner Seal Teflon 13 Retaining Ring SST Cap Bolt A449/A325 CS 15 Lock Washer SST Dome Spring 316 SS 17 Nozzle Retainer A747-CB7CU-1 SS or 17-4 PH SS 18 Wedge Ring TFE 35% Carbon 19 Retainer Bolt SST A193-B8M 20 Bushing Assembly 316 SS 21 Bushing Seal Teflon 4

5 Pilot Materials of Construction 29 33, 34 31, Item Description Material 1 Square Body 316 SS 2 Piston Connector 316 SS 3 Inlet Seat 316 SS 4 Exhaust Seat Retainer 316 SS 5 Exhaust Seat Stem 316 SS 6 Exhaust Nozzle 316 SS 7 Exhaust Washer 316 SS 8 Stop Washer 316 SS 9 Outer Spool Spring Inconel X Inner Spool Spring Inconel X HP Piston Plate 316 SS 12 HP Piston 316 SS 13 HP Bushing 316 SS 14 HP Inlet Nozzle 316 SS 15 HP Dome Spool 316 SS 16 Dome Seal HP Backup Ring 316 SS 17 Piston Seal Teflon /Elgiloy 18 Dome Seal Teflon /Elgiloy 19 Spring Bonnet 316 SS 20 HP Bonnet Ring 316 SS 21 Bonnet Ring Screw 18-8 SS 22 Spring 316 SS 23 Washer Spring (upper) 316 SS 24 Washer Spring (lower) 316 SS Item Description Material 25 Pressure Set Screw 316 SS 26 Adjusting Screw Locknut SA316 SS 27 Lifting Rod 17-4 SS 28 Spindle LL Bushing 316 SS 29 LL Cap SA351-CF8M SS 30 LL Lever SA351-CF8M SS 31 LL Lever Pin 316 SS 32 Cotter Pin 18-8 SS 33 Spindle Nut 316 SS 34 Cotter Pin 18-8 SS 35 LL Cap Screw 18-8 SS 36 Stem Seal Teflon /Elgiloy 37 Exhaust Seat Teflon /15% Graphite 38 Piston Plate Screw A193-B7 Steel 39 Spool/Body Seal Teflon TFE 40 Body/Piston Plate Seal Teflon TFE 41 Roll Pin 420 SS 42 Pipe 1 /4 NPT Plug 316 SS 43 Pilot Nameplate 18-8 SS 44 Nameplate - Patents 18-8 SS 45 Drive Pin SS Note Inconel is a registered trademark of Special Metals Corporation 5

6 Steam Capacity (Lbs/Hr)/Water Capacity (GPM) at 3% Overpressure Valve Set Steam Water Steam Water Steam Water Steam Water Steam Water Steam Water Pressure 01.5x3 1.5x3 1.5x2 1.5x2 2x3 2x3 2x3 2x3 3x4 3x4 3x4 3x4 (psig) H H FB FB J J FB FB L L FB FB For capacities above 3200 psig set pressure - contact factory. 6

7 Steam Capacity (Lbs/Hr)/Water Capacity (GPM) at 3% Overpressure (continued) Valve Set Steam Water Steam Water Steam Water Steam Water Pressure 4x6 4x6 6x8 6x8 8x8 8x8 8x10 8x10 (psig) FB FB FB FB FB FB FB FB For capacities above 3200 psig set pressure - contact factory. 7

8 Model Numbering J 23 /S1 Pilot Series 51 Series 5100 Main Valve Lift 4 Full Lift, API Orifice 6 Full Lift, Full Bore Orifice Main Valve Piston Type 6 Teflon Soft Seat/Seals Inlet Flange Rating, ANSI # # # # # # Orifice Designation Letter API Equivalent Full Bore (Largest practical orifice area for a given valve inlet size) Inlet x Outlet, Inches Main Valve Materials /S SS Body and Trim /S1 CS Body, SS Trim /S2 CS Body, High-temperature Trim (Series 700 only) /S3 WC6 Alloy Steel Body, High-temperature Trim (Series 700 only) /SPL Special Stafford Facility: Tyco Flow Control (TFC) provides the information herein in good faith but makes no representation as to its comprehensiveness or accuracy. This data sheet is intended only as a guide to TFC products and services. Individuals using this data sheet must exercise their independent judgment in evaluating product selection and determining product appropriateness for their particular purpose and system requirements. TFC MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE INFORMATION SET FORTH HEREIN OR THE PRODUCT(S) TO WHICH THE INFORMATION REFERS. ACCORDINGLY, TFC WILL NOT BE RESPONSI- BLE FOR DAMAGES (OF ANY KIND OR NATURE, INCLUDING INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES) RESULTING FROM THE USE OF OR RELIANCE UPON THIS INFORMATION. Patents and Patents Pending in the U.S. and foreign countries. Tyco reserves the right to change product designs and specifications without notice. 8