Emergency Back Pressure Relief Valve Operating
Contents
1. lt lt Ww NN S 27 DETAIL A SCALE 1 1 27 16 1 SEAL RING 151 1 Q CYLINDER ROD SEAL 727 1411 PISTON SEAL OUTER WY 123 1 NU FLANGE SEAL UPPER 22 12 1 M FLANGE SEAL LOWER 11 1 n WAVE SPRING 7 10 1 SEAL 5 N 911 PISTON SEAL INNER h V 811 7 7 1 CLEVIS PIN 611 BUSHING 5 1 SPRING RETAINER 4 1 5 16 SEAT 211 NOZZLE 1 1 A VALVE GATE ITEM QTY PART NO DESCRIPTION DO NOT SCALE DRAWING UNLESS OTHER WISE NOTED 7601 WYATT DRIVE DIMENSION ARE IN INCHES 5 6 76108 2587 fractional 1 32 Scale NONE Drawnby AS liner DT 1 22 59 Approved VK XXX 005 Description Angulartol 30 PARTS amp SEALSKITLISTING diameters concentric to 3 amp 4 EMERGENCY RELIEF VALVE VALVE SECTION 010 unless otherwise noted BACK PRESSURE FULL BORE VALVE SHOWN IN THE CLOSED POSITION vay MATERIAL 2123886 SEALS KIT PART NO APPLICABLE ASSY s K M N P Q R 4123550 BACK PRESSURE P23334 P23335 P16637 P23304 P23303 P23333 4P10258 4123634 BACK PRESSURE VITON P23334 P19296 10063 P23304 P23303 P24152 4P13259 2A27694 3 20K BACK PRESS P23334 P23334 P16637 P23304 P233032. 9886240 508242 31220 vitrcdt 1N3IAD3S 6269146 NOLSId 262646 YINIVLIY DNIYdS 448646 5 588249 34145 9cvzdt Nidd3LLOD SZ XSz L 848tcd 45 6 8824 TVIS 16204 31V1d IWYN S6 c8ldr DNI 3NIVL3H 6tvZ Ld Jdid dHLdN 81 1 85014 Was 5 IAG 259914 550814 INS vOrtcdt NIV Id LONIAV X3HND t LL 662624 31vD INVA 0886246 1 35 806624 1 35 273371 WIS EEEEZd 1 35 ptttcd 1 35 102824 Nid 511312 00 XLE 188624 119182 LXSSHS 6 598624 110934 00SZd 55 91 8 5 55 5 INEL Z L 80ZvZd CS S D g EXSSHS INEL 2 1 AWA 331134 330 404 1dN 8 L 796614 102004 51024 5 11 251004 788 1 529 042 92 OLL OL 51108 3oNvu3unss3ud 5 31VQ N d ASSV UWI OL 6628146 3114 76 154 00085170 3DNVH 38055384 72 7314201308 ONISN TIVISNI WV 17 Full Bore Valve Assembly 4 10K Safety Iron Emergency Relief Valve Back Pressure 10 000 NSCWP 8c8 cvc
3. IT IS THE RESPONSIBILITY OF THE EMPLOYER TO PLACE THE INFORMATION IN THIS MANUAL INTO THE HANDS OF THE OPERATOR FAILURE TO READ UNDERSTAND AND FOLLOW THE OPERATING AND MAINTENANCE INSTRUCTIONS MANUAL COULD RESULT IN SEVERE PERSONAL INJURY OR DEATH Weir SPM 7601 Wyatt Drive Tel 817 246 2461 Fort Worth Fax 817 246 6324 OIL amp GAS TX 76108 USA www weiroilandgas com 2009 Weir SPM 01 09
4. dNOSN 00001 24155384 Bi 21 1485 80194 5 31 HLYOM 14 JANG 1092 XKIgIA3SSV dIAVT2 NOU AL33VS UNA K A NN AN 227 NN NIN lo 3 1235 58744011 015108 V7 72 18400001 0 156384 7311201 ONISN TIVLSNI V 38055384 P ONaVMaS q N a assy e OL 628 Lab N7 18 Full Bore Back Pressure 4 15K Safety Big Iron Emergency Relief Valve 15 000 NSCWP LEL8ZVE dMOSN 00061 FATWA 4434 DIS 13495 YS L wh 381553 4 2 3808 TINA 21177 als ponouddy 80 01 01 189678019 5 1 14 1092 m xx 27222 31 gt 5 LON ON Lyd ASSY 3ONVH 11252 2 2 AQO8 INVA 02 242 408 9886240 5708242 3IZZON blerede NOLSId 2608046 DNIYdS
5. 2 1 gt 5 5 ON 1uvd ASSV INVA Y I 540052 01 W3ONTTIO 34055384 HOIH 091621 000 01 00011 vel9eve 84082 2 856624 TAN WANAD uz 0001 0001 652924 v908zvZ SEETI 20 154 154 008 0 154 0009 NOIVInD3N SSEEZd 3ONVI 154 008 57 4 00001 HOLVINOW 38755384 XIVA 142 000 01 000 L LEd 90082vz YOX 0 45 X 35 ONITANOD YO X X INS NO193NNO YOXFOXFOW X INS 3H WS 14 0 06 SONI HAS LEYS I M 100021 ASSV 35 59 014 2 DZ 0009 0001 4 ttl9zvz 6L087VZ lt gt gt 000751 00071 682924 6 lt 8 2 50082 2 2 lt 20 lt lt 43 0001 0007 682924 4tigzvz Dicezzzve NOIIVUIDHNO AL34VS DNIMOHS ZL IIIS TVLIA tiL VIS TIV13Q YAGNINAD 4 1 FIG 3 1 1 4 8 UN JAM NUT 22 24 SEAL 25 SEAL 32 8 PISTON CYLINDER FLAT WASHER 22 5 SS 30 5 8 11UNC SHCS 4 CYLINDER ROD 15 SEAL RING
6. MAYS 550814 L 8 TIVOS NOLLDAS JAS LAN IAV 08 11 66ctcd 21 9 3ATVA 1 35 0 4 was was D 1 35 1 35 1 1014 Nid SIA3IO 00 X LE 188624 11916 71 X SDHS LL 8 9 E98EZd 1109444 800624 C 9 D1 8 S X SSHS 1 42 1 80 2 JAYA 33188 340 404 14 18 1 Z0Zvcd vSZvcdt 4 CS S D1 ub X SSHS 2 61 42 1 296614 2 17 11 SZvcd 19971 DNINUVM Sc9 cdc 758144 OLL OL 51108 3010401 9v VZdZ JAVA 31V NH3LETV V 3oNvu 38055344 1 35 4 N d assy OL 56628149 1 14 INYN 76 154 000 02 0 38155384 72 3111201 3018 ONISN TIYLSNI V SILON BL 15 Full Bore Valve Assembly Listing 2009214 jeune 33155384 ADVE FATWA 331134 2001 209 1 168 ATSIA3SSV 3ATVA 3808 11014 uonduosaq WOW N L Aqumeig 50 10 11 aa 86 WV 2485 80194 5 31 HLYOM 13 AAC LIVAM 1094 5 Paou 010
7. FLOW OUT LOW PRESSURE XQ 5 2 22 22 e SEE DETAIL B 272 MSS NX SLEEVE Q FLANGE ASSEMB lt lt SS 222 LY SEAL 19 MSV LZ Lu VS NS SS 5 7 7 Q seat 9 SPIDER 11 VALVE BODY 3 222 WING NUT 2 v 1 2 2 2 IN 27 L Y SS SS LLL BUSHING 10 13 125 x 75 COTTER PIN IN DETAIL B 31 3 00 CLEVIS PIN 29 i ON WAVE SPRING 14 VALVE GATE 23 FIG 4 FLOW IN HIGH PRESSURE REPLACEMENT AND ASSEMBLY See ALWAYS REMEMBER Section before assembly The reassembly of the valve is in approximate reverse order to the disassembly process Ref Fig 4 Lightly lubricate all surfaces prior to assembly 1 Using shop air connector Install seal into valve body Replace nozzle 6 and fit over seal 8 CAUTION If seal is difficult to seat push into place with seat and tap lightly Remove seat to ensure seal is properly seated Install the spider 1 Dinto the valve body 3 Jand fit to the nozzle 6 Secure the cylinder rod Din a vertical position using the flats at its mid le ngth Install the sleeve 2 and the piston 8 with seals 27 and CD rod 4 Secure the piston 8 with jam nut using blue Loctite Install bumper 32 washer 3 hex jam n
8. 1186246 5 S 8EZdV 33alds 9zvtdt Nid 331102 SZX 6817 BLBEZd 5 3AVM 64864 1 14 3AVN 5628149 3414 dH 1dN 81 91 Was ES OLd 269914 Mdu5s INYA 550814 3 1315 12121213 NIVId LAN WI 8 b L 662824 BLVD INVA 08862468 1 35 506624 WIS 2 1 35 Was 233171 WIS 102824 Nid 511312 006 LE 188624 119164 1X 5 5 INN 11 8 6 598824 1108 800524 SS D1 8 SX SSHS 1 2 1 80ZvZd 5 5701 9765 SSHS ON 7 196614 3ATVA 431734 330 404 14 8 1 1020704 5 1 L 952246 251004 13971 529 242 AI8IAGSSV d AVTO 133 5 XS 1 209 52 2 1 130 0501 00 0 NOILO3S 00 0 1 758144 011 OL 51108 INDYOL W AONVY 38055384 35 N d ASSY 7uV38 OL S6Z8Ldt 1 4 154 000751 0 JONVU 34155384 Z 731112013018 ONISN TIVLSNI V SILON 19 SAFETY INFORMATION A WARNING IMPORTANT SAFETY INFORMATION ENCLOSED READ THIS OPERATING AND MAINTENANCE INSTRUCTIONS MANUAL BEFORE OPERATING PRODUCT
9. Excellent Oil amp Gas Solutions Emergency Back Pressure Relief Valve Operating and Maintenance Instructions SAFETY INFORMATION WARNING IMPORTANT SAFETY INFORMATION ENCLOSED READ THIS OPERATING AND MAINTENANCE INSTRUCTIONS MANUAL BEFORE OPERATING PRODUCT IT IS THE RESPONSIBILITY OF THE EMPLOYER TO PLACE THE INFORMATION IN THIS MANUAL INTO THE HANDS OF THE OPERATOR FAILURE TO READ UNDERSTAND AND FOLLOW THE OPERATING AND MAINTENANCE INSTRUCTIONS MANUAL COULD RESULT IN SEVERE PERSONAL INJURY OR DEATH Contents Product IDescriptiOT 3 Pressure Temperature 3 ecce ra o tna 3 Description of 3 3 Maintenance 4 Ia 5 DiSass Mmbl estet eet 5 Replacement and Assembly sess 8 Setting and Adjusting 8 Vessel Test Procedures iiis Lies Fate Pte 9 Trouble Shooting 12 Parts and Seals Kit 5 13 Drawing of 3 Valve 15 000 5 14 Drawing of 3 20K Valve 20 000 NSCWP 15 Drawing of 4
10. Valve 602 1002 16 Drawing of 4 Valve 1502 MxF 15 000 NSCWP 17 Drawing of 4 10K Safety Iron Valve 10 000 NSCWP 18 Drawing of 4 15K Big Iron Valve 15 000 NSCWP 19 Product Description Weir SPM s Emergency Back Pressure Relief Valve provides over pressure protection for reciprocating pumps treating lines pressure vessels and other equipment operating under high pressure high flow conditions Compact and simple to operate the valve is direct acting relying on the system s hydraulic pressure to overcome a preset nitrogen gas force to relieve It is externally adjustable from zero pressure to maximum setting Unlike Shear Relief Valves which use common nails to trigger the release the Weir SPM valve will reseat once the system pressure reduces And unlike many High Lift Valves which require a substantial drop in pressure before they will reseat the Weir SPM valve exhibits little blow down and will reseat at or near the cracking pressure Manufactured to Weir SPM s stringent Quality Assurance System all pressure bearing components are made from high quality material The forged body features an integral wing union male inlet or Safety Iron type connections suitable for the pressure rating of the component The low pressure outlet is available with an integral wing union female or Safety Iron connection Conforming to conditions of design and performance in API
11. 24314 3P24263 3 23877 4 23875 23881 23878 P23334 P28201 23879 P16637 P23304 P23303 P23333 4P22397 2428340 4 10K 15K BACK PRESS 3P23880 3P24314 3P24263 3 23877 4 23875 P23881 P23878 P23334 P28201 P23879 P10063 P23304 P23303 P24152 4P22398 METAL SEALS KIT PART APPLICABLE ASSY s A B 4L28048 BACK PRESSURE 3 23880 3P23874 4128049 BACK PRESSURE 23880 23874 4128050 BACK PRESSURE 3P23880 3P24314 4L28051 BACK PRESSURE VITON 3P23880 3P24314 2 28052 3 20K BACK PRESS 3P24349 2A26892 2A28053 3 20K BACK PRESS VIT 3P24349 2A26892 13 Full Bore Valve Assembly 3 Emergency Relief Valve Back Pressure 15 000 NSCWP cOvtcvc oNDuiweig so ejins ssauyBnou 4 05 00061 385538432 4 3ATVA 43134 AON3O3IA3 paou ssajun 010 21 sjajauuelp A18IN3SSV 3ATVA 11014 WOW 00 21 01 Fm 103 uondu saq 500 xxx 10 xx zE jeuonpejj 107 gE es V 4852 80197 SVX31 14 AAC LIVAM 1092 DNIANVHCI dIVOS LON SAHNI NI SNOISN3IAIG 3SIMMH3HLO SS31Nn NOILdlu2S3Q ON 18 4 ASSY liceezevec 154 11 ONIM 2051 Old 11 2520142 AQO8
12. XL 188624 62 1101 L X SDHS DNN 11 8 6 98t zd 8 06 11098343 500524 NI adn 1 26 5 0 11 essed 51 18 6 X SSHS 1742 1 802 24 z ve 55 D1 W E X SSHS 1742 1 196614 z se FATWA 43188 340 404 14 18 1 101774 96 138 1 ONINSVM 6297242 LE e 38155384 P 59713011 OL 51108 31080 X7 11435 154 000751 0 34055384 72 Nid assy 3111201 3018 ONISN TIVLSNI V OL S6Z81dv 31VId v SALON 4 1130 335 yc 8 5 33 c 21 0c 91 LL 92 61 L 81 16 44 7 16 Full Bore Back Pressure 4 1502 M x F Emergency Relief Valve 15 000 NSCWP 89550 0 dMOSNOOOS JAYA 3311344 AON3O13IAG AXN ZOS L 38155384 42 8 3 408 1104 jeuanbuy XXX WOW aat pavaiddy SO 8 lL wa 159 aps V 4852 8019 SVX31 13 JAYA 1092 Xx 05010 NOILO3S S3HONINGUYSNOISNINIG DNIANVHC 5 LON NOLLdIH2S3d ON Lvd ASSY 3ONVH ZOS Lut LAN 112621772 6221142 IMYA 62 042
13. 50 psi below the set point and re approach the set point 5 Testthe working pressure by slowly raising the line liquid pressure until the valve begins to relieve The treating line pressure should stabilize and stop rising once this happens 6 Reduce the line pressure until the valve gate Q3 is fully seated on the nozzle 6 See Fig 4 7 Therelationship between gas pressure and line liquid pressure is defined by Figure 5 These values are from actual tests and should be accurate However if the predicted gas pressure does not produce the desired set pressure you may have to adjust the regulator 8 up or down Some of the factors affecting performance include temperature and gas used air vs nitrogen 8 Resetthe nitrogen pressure to the new set point Test the line again until the valve relieves 9 With pressure on the back pressure relief valve back the adjustment screw of the backpressure regulator 9 Fig 3 out Counter Clockwise until the backpressure regulator exhausts gas 10 Then slowly turn the adjustment screw in Clockwise until the backpressure regulator just stops exhausting gas NOTE Once the relief valve is adjusted to the correct set point it is normal for the gas pressure to rise as fluid in the discharge line to well Fig 1 approaches the set pressure The backpressure regulator will vent gas to compensate this increase in gas pressure Vill Setting and Adjusting IX Vessel Test
14. P23333 4P22394 2A27695 3 20KBACKPRESS VIT P23334 26577 P10063 P23304 P23303 P24152 4P22395 PARTS KIT PART NO APPLICABLE ASSY s A B C D E F G H K L M N P Q R 4123548 BACK PRESSURE 23880 3P24314 3P23876 23298 3P23877 4 23875 P23881 23878 P23334 P23335 23879 P16637 P23304 P23303 P23333 4P10258 4123632 BACK PRESSURE VITON 3P23880 3 24314 3P23876 3P23298LT 3P23877 4P23875 P23881 23878 23334 19296 P23879 P10063 P23304 P23303 P24152 4P13259 4124315 BACK PRESSURE 23880 3P24314 23876 3P24263 3 23877 4 23875 23881 23878 23334 23335 23879 P16637 23304 23303 23333 4P10258 4124316 BACK PRESSURE VITON 3P23880 3P24314 3P23876 24263 3 23877 4P23875 P23881 P23878 P23334 P19296 23879 P10063 23304 P23303 P24152 4P13259 2A27692 3 20K BACK PRESS 24349 2426892 3P24263 23877 4P23875 23881 23878 23334 28229 23879 P16637 23304 23303 23333 4 22394 2A27693 3 20K BACK PRESS VIT 24349 2426892 3 24263 23877 4 23875 23881 23878 23334 28229 23879 10063 23304 23303 24152 4 22395 2 28338 4 BACK PRESS 23880 3 24314 3P24263 3 23877 4 23875 23881 P23878 P23334 P28201 P23879 16637 P23304 P23303 23333 4P10275 2428339 4 15K BACK PRESS 23880 3
15. Shuddering Rapid opening and closing PROBLEM a Used as continuous bypass b Used beyond rated capacity a System pressure hovering at set pressure b Back pressure relief valve located too close to pump s discharge c Valve installed before pressure dampener SOLUTION a Use only as an emergency back pressure relief device b Install sufficient quantity of valves to meet capacity requirements a Raise set pressure slightly b Relocate relief valve Refer to service literature for information on proper location c Relocate relief valve behind pressure dampener 3 Loss of pressure Valve does not seal or loses fluid through discharge a Valve not set properly b Damaged nozzle or valve gate c Damaged high pressure cylinder connection d Contaminants trapped between valve gate and nozzle a Set valve correctly b Replace damaged parts c Replace damaged parts d Clean affected parts 4 Valve leaks through weephole or between valve body and cap a Damaged inner or outer or both flange seals a Replace damaged seals 5 Valve releases higher or lower than intended relief pressure a Valve set incorrectly a Reset valve to desired pressure per instructions in Section VIII 12 Parts and Seal Kit Listing 3 Emergency Relief Valve Back Pressure Full Bore
16. functional The valve is intended to be used as an emergency pressure relief device only and should not be subjected to continuous fluid flow except in emergency situations If the valve is subjected to extended flow or abrasive fluids the valve may not reseal completely once the pressure is relieved If complete fluid shut off is desired a shut off valve such as Weir SPM s plug valve should be installed in series with the relief valve which can be closed once the over pressure is relieved Weir SPM recommends that the valve be serviced on a weekly basis O rings and the mating seal surfaces can be inspected at that time and replaced as required There are sealing surfaces on this device that require maintenance For the valve to operate properly and safely these items must be kept in good condition Inspection and servicing should be conducted in accordance with a recognized maintenance program The more severe the usage the more often the maintenance Any time the valve is sequenced in operation as a result of overpressure other than routine calibration with water prior to pumping operations it must undergo a teardown and comprehensive inspection This should be done immediately following the completion of the current job Not properly servicing the valve once it has discharged frac media including frac sand is dangerous practice and increases the risk of leakage during the next operation Disassembly Repairs and Reassembly sh
17. 2u1ua2uoo 06 Jo 500 Xxx m 10 107 uone 53 gt SNOISNIWIG Q31ON JSIMYSHLO 5531 0 ONIMVAd ATVDS LON di N d ASSY 3715 9720142 lt 192 2 09 6960144 66247244 vELOTWZ 001 VV NOILO3S 9 5 A e 5 Watt 9 ASSV3ONVH 11267 7 2 IAN DNIM EN I 2 AGO8 JAVA 1 Gow v8gezdc 08242 I s a AI8W3SSV 3TZZON vitvzde 1 9 AN3IAD3S 2420146 NOLSId 2626246 8 1 YANIVIFY ONRidS 14886246 6 y ONIHSn8 S 8tZdy 01 gt 148 92 246 ut 1935 9 86246 S 931102 5 621 828624 et gt 3AVM 648624 et TVIS 542014 st 31 1 562814 91 om YINIVL3Y 822014 ET dH LAN 8L L SbOld 81 9 9 WAS 189914 6t Gs 3805 550814 02 3 3315 0 246 12 9 NIVId LAN WI 8 0 11 662624 2 FATWA 0986246 ec was EOEEZd En was vOEETd SZ 1 35 92 WIS 23312 1 22 was 102824 82 51 312 00
18. 3ATVA 8eeczedc GO v88tcdc U3ONITAD 5708042 AT8IA3SSV 31770 1 2 154 LN3IAD3S W3NIV L34 0920146 NOLSId c6ctcdt 45 5 14862468 S 8tcdV 8301145 9cvcdt 1 35 92486248 Nid SZ X 561 DNIYdS JAVM 828624 648624 ONIY 1 35 852014 31Vld 3I AVN S6c8ldV 3dld dH LAN 81 192014 SvOld was 189914 MAYS 550814 2 4315 NIVId LAN WI 8 11 vOvtcdt 66ctcd 31VO 088tcd vis vis 1 35 33334 was vis 108824 Nid 51212006 X LE 188624 1101 SZ LX SDHS DNN LL 8 S 98tcd 1108 800524 wading YJHSYM 1V13 wh LL 5 5 D1 8 S X SSHS 61 42 1 80Zvcd 575 DT X SSHS ON 61 42 1 496614 JAVA 4313Y 44 40414 18 1 202 24 118 1 52092242 38055344 45 31VQ D4JW Assy OL 6628149 1 14 7 54114 011 OL 51108 3010401 V ISd000 SL 0 39 38155384 Z 3112013018 ONISATIVLSNI V 8 82 NOILO3S
19. 7 E ss 5 IN N EN S X3 5 9 7 NNN WV 2 Y gt N AL INN 55 21 77 C Ix isting Full Bore Valve Assembly L 3 20K Relief Valve 20 000 NSCWP 00422 16 dMOSN 00002 3ATVA 33139 OT wf ONLLSIT ASSY SATIVA TINA suondipseq 60 02 06 aea qumeig 646 S3H NINISVSNOISN3IWIG GALONaSIMYSHLOSSTINN V Z8SC 801L9Z SVX31 14 1092 1 gt 5 LON ON Lavd ASSY 14 LIZETL7VTE 2002 INN ONIM 22 6142 id 8 N d N d ONASSV 620824 EEEEZd 129914 v6tccdv 8SvtvcVc VNn8 620824 251924 890014 8 NOLIA LL 31 25 AdO8 3ATVA 8tcZedc GO v88tcdc U3ONITAD Sv08cdc ASSY JIZZON 26892 2 AN3IAD3S 13 6469146 1514 26646 u3NIVLdH 45 LLBETdE ONIHSNG S 8tcdV u3Glds 9cvcdt Nid 831102 SZ X SZU 828624 45 JAVM 648624 1935 21 14 JIAVN 5628147 H3NIVL3H 3414 dH LAN 81 lt 014 was
20. Procedures Pressure continued Prior to shipment product testing procedure 4512497 requires that each emergency valve pass a one time vessel test at 150 it s rated working pressure Then when conducting subsequent vessel tests on used or re certified valves limit the pressure to 100 of rated working pressure as required by 4512497 NOTE This chart does not apply to the 3 2002 20K ERV valve Contact Weir SPM Engineering for 3 2002 20K Full Bore Emergency Unloading Valve Performance Data Values Emergency relief valves should always be vessel tested in accordance with product testing procedure 4512497 A WARNING A FULLY ASSEMBLED RELIEF VALVE Reauired SHOULD NEVER BE PRESSURE TESTED WITH THE i ATE OUTLET DISCHARGE PORT BLANKED OR BLOCKED Line Nitrogen or OFF AS THIS WILL RESULT IN A CATASTROPHIC Set Pressure gas Pressure FAILURE Below is excerpt from 4512497 regarding the PSI PSI proper vessel testing procedure on used or recertified emergency relief valves 350 0 500 14 Vessel Test Procedure for Used or Recertified Emergency 1000 28 Back Pressure Relief Valves 1500 41 1 Assemble valve body with required blanking seat 2000 55 spider and dummy blanking cap for testing purposes 2500 69 only See Fig 7 amp 8 Vessel Test Procedure for seat spider and cap part numbers 3000 83 2 Attach valve to testing pum
21. RP520 the Weir SPM Emergency Back Pressure Relief Valve is intended for liquid service It is not intended for elevated temperatures nor as a safety device in case of fire Available in 3 or 4 this valve offers pressure ranges from 1 000 20 000 psi The valve is best suited for over pressure protection in a slick water medium However due to its large bore it should work well in drilling mud applications also Pressure Temperature Ratings The Weir SPM 3 or 4 Emergency Back Pressure Relief Valve is available in the following configurations at this time Fluid Side Ratings PRESSURE END SEALS LOW PRESS RANGE NSCWP TEMP INLET DISCHARGE PSI PSI SERVICE RANGE 3 1502 3 1502F 1000 15000 15000 Standard 30 110C 3 2002M 3 2002 1000 20000 20000 Standard 30 110C 4 1002M 4 1002 1000 10000 10000 Standard 30 C 110C 4 1502 4 1502M 1000 15000 15000 Standard 30 C 110C Gas Side Specifications Low Pressure Working Range 0 to 800 psi Recommended Nitrogen Bottle 2 000 psi Recommended Rupture Disc 2 250 psi Bottle or source gas pressure should be twice maximum low pressure working range 22 F to 120 F 30 C to 49 C Operating Temperature Ill End Connections Weir SPM s 3 or 4 Emergency Back Pressure Relief Valve is available with Weir SPM Wing Union or Safety Connections The nameplate will i
22. RTAIN TO USE AN APPROPRIATE TORQUE WRENCH THAT FITS THE DIMENSIONS AND FEATURES OF THE ABOVE ILLUSTRATION WEIR SPM CAN FURNISH VALVE BODY ITS P24509 TORQUE WRENCH 3 SET THE TORQUE WRENCH TO 62 FT LBS THIS WILL DEVELOP A 110 FT LB TORQUE AT THE SOCKET SCREW 4 KEEP THE TORQUE WRENCH AND EXTENSION IN LINE AT ALL TIMES FIG 6 10 VESSEL TEST PROCEDURE FOR 3 AND 4 N2 EMERGENCY RELIEF VALVES 3 amp 4 EMERGENCY RELIEF VALVE WARNING u INCORRECT JVZ SS f TESTING PROCEDURE pe PUMP Boer GAUGE PLUG FLOW gt J FIGURE 7 EXAMPLE OF IMPROPER TESTING SET UP OF EMERGENCY RELIEF VALVE NEVER BLANK OFF OUTLET PORT BLANKING CAP BLANKING SEAT PART NO 2P27582 PART NO 2P27370 CORRECT TESTING PROCEDURE INLET PORT 7 PUMP GAUGE PLUG FLOW gt 2 FIGURE 8 EXAMPLE OF PROPER TESTING SET UP OF EMERGENCY RELIEF VALVE VERIFY THAT OUTLET PORT IS OPEN FIG 7 and FIG 8 11 TROUBLESHOOTING GUIDE Always follow existing company procedure concerning identifying equipment for inspection and removing equipment from service The following is intended as a general guide in helping resolve most problems encountered in repairing relief valves If problems are not covered here please contact Weir SPM for assistance at 817 246 2461 SYMPTOM 1 Rapid erosion 2
23. by clamping the valve body 3 a vise Fig 4 Remove the eight lower and ten upper 5 8 socket screws from the Separate the cylinder from the flange If piston extraction is difficult after jackscrews are fully extended replace with 1 2 13 UNC x 1 1 2 LG or longer bolts for easier disassembly Separate the flange 1 from the 3 using jackscrews Remove the entire bonnet assembly from the body 4 Remove the cotter pin 13 from the clevis pin Remove the clevis pin 29 from the cylinder rod A The valve gate Wave spring Spring 9 and bushing 10 can now be removed from the cylinder rod 4D Remove the piston 8 with the cylinder rod from the flange assemblyC1 5 Hold the cylinder the flat at its mid length Exercise care not to damage the rod s other surfaces Remove the hex jam nut 22 and washer 33 from the cylinder rod 4 The bumper 32 can now be removed Remove the jam nut 22 Then the piston 8 and sleeve 27 be removed 6 Remove the spider 1 Dfrom the valve body 3 Remove the nozzleC6 along with the seat 12 from the body Gently remove the seal from the valve body 3 Inspecting Components Fig 4 1 Body 3 Visually inspect the o ring groove area beneath the nozzle 6 This is critical area If the groove shows indications of damage from erosion or corrosion the body should be replac
24. ed It is not repairable Visually inspect the fluid discharge surface for erosion or corrosion Some wear in this area is expected Any damage to this surface that extends deeper than 10 renders the part unusable and it should be replaced Visually inspect nylon guide bushing on flange assy 1 seal surface for erosion or corrosion Damage to this area will allow fluid to leak past the flange during the relieving function If this surface shows signs of damage the body should be replaced 2 Cylinder 5 Visually inspect the inside surface of the cylinder for wear or damage Damage to this surface renders this component unusable and should be replaced 3 Piston Visually inspect the piston seal areas for damage or wear If damage or wear is evident the part should be replaced 4 Flange 15 Inspect the seal 26 pocket in the nylon sleeve at the bottom Inspect seal and 05 pockets for wear sleeve and seal pockets should be in good condition If not the flange should be replaced 5 Spider D Visually inspect the fluid discharge areas for erosion and corrosion Some wear in these areas is expected Any damage in these areas that extends deeper than 06 renders the parts unusable and they should be replaced 6 Valve 23 and Nozzle 6 The gate and nozzle are considered expendable items and spares should be kept on hand at all times The life of these parts is dependent on the type and length of
25. ndicate the cold working pressure allowable for each assembly Wing union connections on the relief valve are interchangeable with other union connections of the same size and figure pressure rating Caution must be taken to avoid mixing different ratings of wing connections There are various sizes and figures that are capable of making marginal connections Safety connections are universal requiring no male or female as the wing union does Failure to observe good judgement may lead to failure of components and danger to life and limb Always verify working pressure ratings of each connection before use This device is intended to discharge to atmospheric pressure when it relieves It should not be subjected to any significant backpressure The choice of discharge connections is offered as a convenience for the user and does not imply high pressure capability Observe all instructions cautions and warnings as noted in this brochure Failure to do so can lead to equipment damage personal injury or loss of life AA WARNING NEVER BLOCK DISCHARGE PORT IV Description of Operation The back pressure relief valve operation is a simple balance between the nitrogen or suitable gas acting on the piston and the inlet liquid pressure acting on the rod and wear sleeve The equation is Pressure times Area equals Force PxA F The ratio of areas is approximately 25 0 1 for the 15 000 psi rated valve This means that nitrogen
26. ould be done in accordance with service manual instructions In order to determine the N2 gas line pressure the valve is equipped with a corrosion resistant bourdon tube gauge with a pressure rating of 0 to 600 psi This range is adequate to allow the valve to reach maximum operational working pressure and yet still allow precise adjustments in line pressure However if the relief valve is only operated at release pressures below 6000 psi then the pressure gauge could be replaced with a 0 300 psi gauge This would increase the accuracy at which the N2 gas line pressure could be adjusted The primary consideration is not to operate the pressure gauge beyond 7596 of its rated capacity for any extended period of time If additional information is needed please contact the Weir SPM Engineering department VII Service TOOLS REQUIRED 1 Vise 1 2 Hex Socket Wrench amp 1 4 Hex Socket Wrench Screwdriver 2 Hammer Special Torque Tool see Fig 6 1 2 BAR x 12 LG Aluminum or Brass 600 Grit Sandpaper Anti seize Lubrication Hand and Eye Protection 0 2 1 2 13 UNC x 1 1 2 LG bolt for cylinder extraction DISASSEMBLY Fig 3 amp 4 WARNING MAKE SURE THAT THERE IS NO PRESSURE ON THE VALVE If the nitrogen cylinder is attached close the high pressure cylinder valve 2 Then bleed down and remove the nitrogen line from the back pressure valveC1 Fig 3 2 Secure the valve in a horizontal position
27. p 3500 97 3 Fill with water and bleed off all air from the system prior to testing 2900 110 4 Hydrostatically test pressuring to 100 of 4500 124 product s designed working pressure 5000 138 5 Hold pressure for the duration to time specified in 5500 152 4512497 and check for leaks Assembly is considered acceptable if there are no visual indications of leaks 6000 166 and the pressure drop is within the allowable range 6500 179 specified in 4512497 section 6 0 relief valve 7000 193 6 Reduce pressure to zero 7500 207 Recommendation Purchase a spare spider designated for 8000 221 the sole purpose in testing relief ERV valves as to prevent 8500 234 damage to the original spider that was assembled in your N2 relief valve 9000 248 9500 262 10000 276 10500 290 11000 303 11500 317 12000 331 12500 345 13000 359 13500 372 14000 386 14500 400 15000 414 FIG 5 WRENCH EXTENSION KEEP TORQUE WRENCH AND WRENCH EXTENSION IN LINE VALVE BONNET VALVE FLANGE 1 2 ALLEN WRENCH 3 8 16 5 WRENCH EXTENSION 2P24505 APPROXIMATE CENTER OF GRIP RRA 1 2 DRIVE TORQUE WRENCH 10 100 ft Ibs P24509 15 16 SOCKET 1 2 DRIVE 6 POINT SOCKET SCREWS 11 75 15 00 26 75 1 USE ABOVE TO TO TORQUE AND REMOVE SOCKET SCREWS HOLDING VALVE FLANGE TO VALVE BODY AND VALVE BONNET 2 BE CE
28. pressure of 100 psi can counter an inlet line pressure of 2500 psi for the 15 000 psi rated Emergency Back Pressure Relief Valve Variations in this ratio in practice are due to friction of seals and will be discussed in section VIII Setting and Adjusting Pressure V Installation The Weir SPM Emergency Back Pressure Relief Valve should be installed in a branch on the high pressure pump line Fig 1 To avoid stability problems the valve should not be mounted directly at the pump discharge but rather somewhat removed from the pump due to the fluctuating discharge signature of the pump Preferably the valve should be mounted in the vertical position as shown to reduce the tendency for contaminants and particulates in the fluid to collect at the throat of the main seal However any position is acceptable within approximately 30 degree declination angle from vertical The gas regulator and gas back pressure relief valve should be installed as close to the relief valve as possible The nitrogen filled high pressure cylinder must be secured to either a skid or trailer or by staking it to the ground Any type of liquid may be unloaded through the valve valve will tolerate clean liquids better than others And lighter liquids will flow greater rates than heavier liquids Particulates abrasives and contaminants will not preclude the valve from opening at the appropriate set pressure However abrasive materials will cause some wea
29. r between the wear sleeve nozzle and main seal While these components feature wear resistant surfaces their life will be reduced as the abrasives increase in the fluid CAUTION It is important for the user to consider the consequences of a valve that does not fully reseat after it has relieved In the event that this might present a danger to personnel or equipment Weir SPM highly recommends that an isolator valve be placed between the pressure line and the Relief Valve With the device installed as shown in Fig 1 any time the pressure exceeds the set pressure at the Emergency Back Pressure Relief Valve the fluid will pass through the valve and out the discharge PRESSURE REGULATOR BACK PRESSURE REGULATOR BACK PRESSURE RELIEF VALVE DISCHARGE TO ATMOSPHERE TO WELL HIGH PRESSURE NITROGEN CYLINDER LH ooo RF FIG 1 At low flow rates the valve will discharge fluid at approximately the set pressure Fig 2 At higher flow rates the valve will discharge fluid at levels above the set pressure API 520 defines the valve flow capacity as the rate that can be relieved at an over pressure of 2596 When the fluid pressure falls to the set pressure level or below the valve will reseat and reseal x ZL 3 FIG 2 D Fluid pressure below set pressure rod and valve gate
30. seated reseated 2 Fluid pressure slightly above set pressure rod and valve gate slightly off nozzle 3 Fluid pressure substantially above set pressure rod and valve gate off nozzle CAUTION Weir SPM s 3 or 4 standard service Emergency Back Pressure Relief Valve is not intended for use in the sour gas environment WARNING DO NOT USE FOR H2S SERVICE Weir SPM does offer separate series of H2S service back pressure valves Contact your Weir SPM representative for advice about sour gas service applications ALWAYS REMEMBER 1 44 WARNING DISASSEMBLY UNDER PRESSURE CAUSE SERIOUS INJURY OR DEATH 2 Always use a new parts kit for reassembly 3 Clean all components thoroughly prior to reassembly using protective clothing and safety glasses 4 Check sealing surface area of valve gate and nozzle for pitting erosion or other flaws Failure in sealing can result if these areas are not smooth 5 Use only Weir SPM relief valve parts on Weir SPM relief valves 6 This device is intended to discharge to atmospheric pressure when it relieves It should not be subjected to any significant back pressure VI Maintenance General Inspection and Repair The Weir SPM 3 or 4 Emergency Back Pressure Relief Valve is a well designed dependable component that should provide long term reliable performance for the user Like any device however it requires routine inspection and servicing to guarantee that it is fully
31. service to which they are exposed Visually inspect the gate and nozzle for indications of wear and of pitting erosion or corrosion damage These are critical components in the function of the valve Any indications of deterioration more than 01 deep should be cause to replace these items Deterioration of the sealing surfaces less than 01 deep should be removed by polishing with 600 grit sandpaper Keep flatness of surface when polishing Total depth of polishing should not be more than 015 for each sealing surface Look for contaminants that while not damaging to the gate and nozzle will keep the parts from sealing Remove any foreign material found 7 Seals 15 1922525 26 27 28 All elastomer seals should be replaced regardless of condition See drawing 2L23886 page 13 for Seal and Part Kits See all assembly drawings for 3 and 4 configuration for parts and seal part numbers pages 14 through 19 21466011 3unssaud 38155384 ADVE 000 01 0007 1 4cte9zd 62 92 3408 TINA JAYA 33138 NOLVTIVISNI 000 51 000 1 zovezvz paroiddy 00 P L Z n 7 SV 5 000702 00071 662924 3434414 t9v9cvc V 4852 8019 5 31 14 NI SNOISN3IAICI AAG 1092 SSTINN 000 0 000 1 6tz9zd
32. ure The Emergency Back Pressure Relief Valve is direct acting The pressure set on the nitrogen regulator is directly related to the relief pressure The higher the nitrogen pressure the higher the relief set point Use the following procedure to obtain the correct set point A few attempts at working pressure may be required to confirm the set point Fig 3 Clean dry air at a minimum of 1350 psi 6000 psi max may also be used CAUTION Bleed off all air from the fluid system Trapped air will become energized and may cause injury to personnel when the valve relieves 1 Screw the pressure regulator 8 adjustment screw all the way out Counter Clockwise to open CAUTION When the handle hits its stop the top of the regulator may start to unscrew Do unscrew the regulator top any further 44 WARNING FAILURE TO COMPLY MAY CAUSE INJURY TO PERSONNEL WHEN PRESSURE IS APPLIED TO THE VALVE 2 Open the valve 15 on the nitrogen bottle or from the air source The inlet the regulator 8 should indicate the pressure in the nitrogen bottle UJ Tighten the backpressure 9 adjustment screw fully Clockwise 4 Turn the adjustment screw on the regulator 8 until the gas line pressure reaches a nominal set point Use the chart in Figure 5 to find gas pressure versus set pressure NOTE Always set the pressure in the Rising Direction If you pass a set point drop the pressure to about
33. ut 22 using blue Loctite Install seals 25 and 19 into the flange assembly 1 Uniformly apply a small amount of anti seize compound on the inside friction surface of the nylon bushing of the flange assembly 15 Carefully insert the cylinder rod 4 with piston 8 the flange assembl Insert wave spring into 503 retainer 9 followed new or polished valve gate Install the bushing into spring retainer 9 Assemble the spring retaine and the cylinder rodC4 together by using the clevis pin Q9 Secure the clevis pin by cotter pin 413 Install the entire cylinder rod flange package into the valve 3 Tighten the eight 5 8 socket screws that hold the flange assembly 15to the body G using proper torque orientation to 110 ft Ib lubricated Install 5 onto and tighten the ten 5 8 socket screws proper torque orientation to 110 ft Ib lubricated Tighten the connector 13 See Fig 3 into the cylinder with thread sealing compound See Fig 3 and vent hole on the valve assemblyC 1 stroke the 87 and out to assure that it moves freely 10 The valve is now ready for pressure testing as discussed in Section VIII Pressure Testing Observe all instructions cautions and warnings as noted in this manual Failure to do so can lead to equipment damage personal injury or loss of life Vill Setting and Adjusting Press
Download Pdf Manuals
Related Search