Transcription
Ball Valves Installation,Operation & Maintenance Manual#2906-15 Fort York BoulevardToronto, Ontario, M5V 3Y4, CanadaTel/Fax: 1 416 342 0001www.vahn-tech.com
www.vahn-tech.comCONTENTS1. SCOPE12. INTRODUCTION3. TECHNI CAL ASSISTANCE14. DELIVERY25. VALVE HANDLI NG & STORAGE5.1. Handling5.2. Storage2246. VALVE I NSTALLATION6.1. General6.2. Flanged ends6.3. Welded endsϲ͘ϰ͘ ůĞĂŶŝŶŐ ĂŶĚ dĞƐƟŶŐ446677. VALVE OPERATION7.1. General7.2. ActƵĂƟŽŶ 7.3. Sealing7.4. Cavity relief7.5. Sealant Charging7.5.1. Stem7.5.2. Seat7.6. Fire Safety7788999998. PERIODI C MAINTENANCEϴ͘ϭ͘ /ŶƚƌŽĚƵĐƟŽŶ 8.2. Double block and bleed and ĂǀŝƚLJ ŇƵƐŚŝŶŐ ƉƌŽĐĞĚƵƌĞ8.3. OƉĞrability & torque8.4. Stem leakage8.5. Sealant charging99101010109. TROUBL ESHOOTING10. VALVE DETAILS111211. MAINTENANCE PROCEDURES11.1. Gear stŽƉƉer adjustŵĞŶƚ Ɖƌocedureϭϭ͘Ϯ͘ ƚĞŵ ƐĞĂů ƌĞƉlacemĞŶ Ɖƌocedure11.3. Secondary sealant injĞĐƟŽŶ Ɖrocedure - Stem11.4. Secondary sealant injĞĐƟŽŶ Ɖrocedure - Seat ring11.5. DismantůŝŶŐ Ɖƌocedure11.6. Assembly Ɖrocedure1313131414151612. SPARES & SEALANTSϭϮ͘ϭ͘ ƉĂƌĞs12.2. Sealants191920APPENDICESAPPENDIX A TECHNICALINFORMATIONA1.ReferencesA2. Tightening Sequence & Torque.1212121APPENDIX B - SPECIAL CONSIDERATIONS IN VALVES WITH EXTENDED STEM 24
www.vahn-tech.com1. SCOPE1.1.The aim of this manual is to familiarize the users with standard VAHN-TECH Trunnion Mounted BallValves and to aid in correct handling, installaƟŽn , operaƟŽŶ, maintenance and troubleshoŽƟŶŐ of the valves.VAHN-TECH INTERNATIONAL RECOMMENDS TORead the manual carefully before opening the shipment and installation of the valve.Refer respecƟǀĞ Őeneral assembly drawings for ascertaining the design, as valvesmay vary in features and design as required by the customer.Study check lists, caƵƟŽns and illuƐƚƌĂƟons carefully.2. INTRODUCTION2.1.s ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů Trunnion Mounted Ball valves come with side entry type, two-piece, boltedΘ ǁĞůĚĞĚ ƚLJƉĞ ďŽĚLJ ĐŽŶƐƚƌƵĐƟŽŶƐ ĂŶĚ ǁitŚ ŇĂŶŐĞĚ ;ZĂŝƐĞĚ ĨĂĐĞͬRing type joint) and buƩ weld ends.In addiƟŽŶ, VAHN-TECH /ŶƚĞƌŶĂƟŽŶĂů supplies Trunnion Mounted Ball Valves with three piece boltedbody ͬ welded body type construcƟŽŶs also.2.2.Salient features of VAHN-TECH Trunnion Mounted Ball Valve:Double Block and BleedThis is a standard feature in s ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů Trunnion Mounted Ball Valves ;dMBV), whichenables cŚĞĐŬŝŶŐ ƚŚĞ ůĞĂŬ ƟŐŚƚŶĞƐƐ of the valve seats in the open and closed poƐŝƟŽnƐ͕ ĂŌĞƌ ŝŶƐƚĂůůĂƟŽŶ͘ Cavity Pressure ReliefVAHN-TECH /ŶƚĞƌŶĂƟŽŶĂů TMBV has seats designed to relieve any excessive pressure that builds upin the valve body cavity automĂƟĐĂůůLJ ŝŶƚŽ ƚŚĞ ŇŽǁ ƉĂƚŚ͘AnƟͲďůŽǁŽƵt StemVAHN-TECH /ŶƚĞƌŶĂƟŽŶĂů TMBV are designed ǁŝƚŚ ĂŶƟͲďůow out stem arrangement in which thestem is inserted from inside the body.Sealant InjĞĐƟŽn ĞĂůĂŶƚ ŝŶũĞĐƟŽŶ ƐLJƐƚĞŵ is provided for seat and stem regions for emergency sŚƵƚ Žī ͬ leakarrest on valves of sizes 8” and above for full bore valves and 10” and above in case of reducedbore valves.KƉƟŽŶĂů &eaturess ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů also provides TMBV with double piston design, which allows the downstream seat to seal with presƐƵƌĞ ĂĐƟŶŐ ĨƌŽŵ the upstream side of the valve. It aids in bĞƩĞƌsealing even during leakage through upstream seat.VAHN-TECH /ŶƚĞƌŶĂƟŽŶĂů TMBV can also be provided with extenĚĞĚ ƐƚĞŵͬ drives for buried servicevalves.3. TECHNICAL ASSISTANCE3.1.Should you have any queries, feel free to contact s ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů sales represĞŶƚĂƟves.
www.vahn-tech.com3.2.While contacƟŶŐ ŽƵƌ ƌepƌesentaƟves͕ ƉůĞĂƐĞ ĨƵƌŶish the followiŶŐ dĞƚĂŝůƐ ĨŽƌ ďĞƩĞƌ ĂƐƐistance:Valve size and Class ƌĂƟŶŐ ͬ EĂŵĞ ƉůĂƚĞ ĚĞƚĂŝůssĂůǀĞ ƐĞƌial nƵŵďeƌ 4. DELIVERY4.1.s ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů dD s aƌe shipped with tŚĞ ďĂůls ŝŶ ĨƵůůy open posiƟŽŶ ĨŽƌ ƚŚĞ ƉƌŽƚĞĐƟŽŶŽĨ ƚŚĞ ďĂůů ĂŶĚ ƐĞat ƌŝŶŐ ƐƵƌfaces ( excepƚ ĨŽƌ ǀĂlves ĮƩĞĚ ǁŝƚŚ ƐƵŝƚĂďle actƵĂƟŽŶ ĨŽƌ ĨĂŝů ĐůŽƐĞ applicĂƟŽŶƐ ͕ ŝŶ ǁŚich case, valves ĂƌĞ shipped ŝŶ ĨƵůůLJ closed cŽŶĚŝƟŽŶͿ.4.2.Please cheĐŬ ƚŚĞ ƉĂĐŬŝŶŐ ƐůŝƉ ĂƩĂĐŚĞĚ to the packinŐ ĐŽŶƚĂiŶĞƌ͘4.3.dŚĞ ǀĂlve ideŶƟĮĐĂƟŽŶ ĚĞtĂŝůƐ ĐĂŶ ďĞ ĨŽƵŶĚ on the nĂŵĞ ƉůĂƚe anĚ ŽŶ ƚŚĞ ďŽdy of the valve ascasƚ ůĞƩĞƌŝŶŐ Žƌ ŽŶ ƚŚĞ ŇĂŶŐĞ͘ 4.4.dŚĞ ǀĂlves aƌĞ ƐƵpplied ǁŝƚŚ ĞŶĚ ƉƌŽƚĞĐtŽƌƐ coveƌŝŶŐ tŚĞ ƉŽƌts to avoŝĚ ĚĂŵĂŐĞ ƚŽ ŝŶƚĞƌŶĂůs ĚƵe toƉƌĞƐĞnce oĨ ĂŶLJ ĨŽƌĞŝŐŶ ƉĂƌƟĐles ďefoƌe installĂƟŽn.4.5.Hand wheels ĨŽƌ ŐĞaƌ ŽƉeƌĂƚĞĚ ǀĂlves aƌĞ ƵƐƵĂůly ĚŝƐŵĂŶƚůĞĚ Ănd packed sepĂƌĂƚĞly͘ dŚĞ ŬĞLJ ŝƐ ŬĞƉƚ in its slŽƚ ĂŶĚ ŚĞůĚ ŝŶ ƉŽƐŝƟŽŶ ƵsinŐ ĂŶ ĂĚhesive tape.CHECKdĂŐ ŶƵŵďĞƌƐ ĂŶĚ ĚĞƚĂŝls of valves at delŝǀĞƌLJValves ƚŚŽƌŽƵŐŚůLJ ĨŽƌ any dĂŵĂŐes dƵƌŝnŐ ƚƌĂŶƐŝƚ.ConĚŝƟŽŶ ŽĨ ĞŶĚ ƉƌŽƚĞĐƚoƌƐ͘Extension lines and colƵŵn, if any.In case of aŶLJ ĚŝƐĐƌĞƉancies ŝŶ ƚŚĞ ĂďoǀĞ ŵĞŶƟoned details oƌ ŝŶ case of any kind ofĚĂŵĂŐe to the valve on deůŝǀĞƌLJ͕ ƉůĞase contacƚ s ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů ĨŽƌ assistance.ϱ͘ s s , E /E' Θ dKZ ' 5.1.HandlinŐ5.1.1.Valve shall ďĞ ƉƌŽpĞƌly sƵƉƉŽƌƚed and seĐƵƌĞĚ ďĞĨoƌe ŵŽviŶŐ͕ ƚŽ ƉƌĞvent possiďůĞ ĚĂŵĂŐĞ ƚovalvĞ͕ ƉƌopeƌƚLJ Žƌ Śaƌŵ ƚŽ ƉĞƌƐŽnnel.5.1.2.DŽ ŶŽƚ ĚƌĂŐ ƚŚĞ ǀĂlve oŶ ƚŚĞ ŐƌoƵŶĚ ǁŚŝůĞ ƚƌĂnspoƌƟŶŐ͘ ŵiniŵƵŵ of one foot ŚĞŝŐŚƚ Ĩƌoŵ ƚheŐƌŽƵnd is to ďĞ ŵĂŝŶƚĂŝŶeĚ ǁŚŝůĞ ŵovinŐ ƚŚĞ ǀĂlve.
www.vahn-tech.com5.1.3.Valves shall not be slung around the valvĞ ƉŽƌƚ ĨŽƌ ƚƌĂŶƐƉŽƌƚĂƟŽŶ͘ ŝŌŝŶŐ ůƵŐƐ ĂƌĞ ƉƌŽǀŝded forthe purpose on valves of sŝze 8” and above. If need ĂƌŝƐĞƐ, the valve may be slung around the valvebody at ƚŚĞ ŶĞĐŬ ŽĨ ƚŚĞ ĞŶĚ ŇĂnge.5.1.4.The cranĞ ǁŝƌĞ ƐŚould not be slung around the actuator / gear unŝt to ĂǀŽŝĚ any load acƟŶŐ on ŝt. ůƐŽ͕ ĞŶƐƵƌĞ ƚŚĂƚ ǁŚŝůĞ hanĚůŝŶg the valve, no external load acts on the actuator/gear uŶŝƚ͘5.1.5.Valves sŚĂůů ŶŽƚ ďĞ ŚĂŶĚůĞĚ ǁŝth the hand wheel keyed / Įxed to the geĂƌ ƵŶŝƚ. The hand wheelshall bĞ ĚŝƐmantled before handlŝng and transpoƌƟŶŐ ƚŚĞ ǀĂlve.
www.vahn-tech.com5.1.6.Extreme care shall be taken to check that the sealant ĮƫŶŐƐ͕ ďŽĚLJ ǀĞŶƚ ĮƫŶŐƐ͕ Ɛƚeŵ͕ ŐĞĂr units etc.ĂƌĞ ŶŽƚ ďĞŶƚ͕ ƉŝŶchĞĚ Žƌ ĚĂŵĂŐĞĚ ĚƵƌŝŶŐ ŚĂŶĚůŝŶŐ.5.2.SƚŽƌĂŐe5.2.1.Clean the ǀalǀes ĂŶĚ enƐƵƌĞ ƚŚĂƚ ĞŶĚ ƉƌŽƚĞĐƚŽƌƐ ĂƌĞ ŝŶ ƉůĂĐĞ ďĞfŽƌĞ ƚŚĞ ǀĂůǀes are storeĚ͕ ĂƐ ĚƌLJcontaminants like ĚƵst͕ sĂŶĚ͕ Őƌŝt etc. can scratch the ŵĞƚĂů ƐĞĂƟŶŐ surfaces ĂŶĚ ƚŚĞ ƐŽŌ ŝŶƐeƌƚƐ͕ ůĞĂĚiŶŐ ƚŽ ůĞĂŬĂŐeƐ ŽŶ ĨƵůů ƉƌesƐƵƌĞ ŽƉeƌĂƟon.5.2.2.sĂůǀes shĂůů ďĞ ƐƚŽƌĞĚ ŝŶ a ĐŽǀĞƌĞĚ ĂƌĞĂ ǁŚŝĐŚ ŝs ĚƵst ĨƌĞĞ͕ ůŽǁ huŵŝĚ ĂŶĚ ǁĞůů ǀĞŶƟůĂƚeĚ͘5.2.3.dŚĞ ǀĂlǀe shĂůů ĂůǁaLJƐ be ŵĂŝŶƚĂŝŶĞĚ in an ambienĐĞ ǁŝƚŚ temƉerature hiŐŚĞƌ ƚŚĂŶ ƚŚĞ ĚĞǁ ƉŽŝŶƚ ƚĞŵƉĞƌĂƚƵƌĞ Ăƚ ƚŚĞ ƐƚŽƌĂŐĞ ůŽĐĂƟŽŶ͕ ƐŽ ĂƐ ƚŽ ĂǀŽiĚ ĐŽůůĞĐƟŽŶ Žf ǁĂƚĞƌ ĚroƉlĞƚƐ ŽŶ ƚŚĞ ǀĂlǀesurface.5.2.4. Ž ŶŽƚ ŬĞĞƉ tŚĞ ǀĂlǀĞ ĚiƌĞĐƚůLJ on the ŇŽŽr. Valǀe shall be ƉůĂĐĞĚ oŶ Ă ǁŽŽĚen ƉĂůůĞƚ Ɛuch that it isat least at a ŚĞŝŐŚt of 6 inches from the ŇŽŽr.5.2.5.Care sŚŽƵůĚ be exercŝƐĞĚ not to ĚĂmĂŐĞ the extĞŶĚĞĚ ƉŽrƟŽŶs of the stem ŚŽƵƐŝŶŐ͕ ŐĞĂƌ unit /actuator ǁŚŝle storaŐĞ.5.2.6. Ž ŶŽƚ ĂƉƉlLJ ƚĂƌ͕ ŐƌĞĂƐĞ Žƌ ĂŶLJ ŽƚŚĞƌ ŵĂƚĞƌŝĂů ŝŶƐŝĚe the ǀalǀe͕ Ăs it cŽƵůĚ ŝŵƉĂŝƌ ƚŚĞ ƉĞƌĨormanceŽĨ ƚŚĞ ǀĂůǀĞ͘ CAUTION/ŵƉƌŽƉĞƌ ƐƚŽƌĂŐĞ ĂŶĚͬŽƌ ŚĂŶĚůŝŶŐ ŵĂLJ ĐĂƵƐĞ ďĂůůͬƐĞĂƚ ĚĂŵĂŐĞ Žƌ ĚĞĨŽƌŵĂƟŽŶ ŽĨ stem oƌ ƐĞĂƚ͕ ǁŚich ǁŝůů ĂīĞĐƚ ƐĞĂůiŶŐ ĂŶĚ ŽƉĞƌĂƟŽŶĂů torque of the ǀĂůǀĞ͘ DO NOT ƚŽƌĞ ƚŚĞ ǀĂůǀĞ ŽƵƚĚŽors. ƚŽƌĞ ǀĂlǀe ǁŝƚŚŽƵƚ ĞŶĚ Ɖƌotectors.Place or ĚƌĂŐ ƚŚĞ ǀĂůǀĞ ŽŶ ƚŚĞ ŐƌŽuŶĚͬĐoŶĐƌĞƚĞ ŇŽŽƌ.WůĂĐĞ ǀĂůǀĞ ŝŶ ƉŽƐŝƟons thĂƚ ŵĂLJ ĚĂmaŐĞ ƚŚĞ ǀĂlǀe or its accessories. ůŝŶŐ ƚŚĞ ǀĂlǀĞ ǁŝƚŚ Ěŝƌect contĂĐƚ ǁŝƚŚ acƚƵĂƚŽƌͬŐĞar uŶŝƚ ĚƵƌŝŶŐ haŶĚůŝŶŐ.KƉĞƌĂƚĞ ƚŚĞ ǀĂůǀĞ ǁŝƚŚŽƵƚ ĐůĞĂŶŝnŐ ŝƚ ƉƌoƉĞƌlLJ.6. VALVE INSTALLATION6.1.General6.1.1. ĂƌĞĨƵůůLJ unƉĂĐŬ ƚŚĞ ǀĂlǀe ĂŶĚ ĐheĐŬ ĨŽƌ ƚĂŐƐ Žƌ ŝĚeŶƟĮĐĂƟŽŶ ƉůĂƚĞƐ͕ Ğƚc.6.1.2./Ĩ ƚŚĞ ŶĂŵĞ ƉůĂƚĞ ĂŶĚͬ Žƌ ƚĂŐ ŝƐ ůŽƐƚ Žƌ ĚĞƐƚƌŽLJĞĚ ĚƵƌiŶŐ ƐŚiƉŵĞnt or ǁŚŝůĞ in storĂŐĞ or if it is notůĞŐŝďůĞ͕ ĐŽŶƚacƚ LJŽuƌ Ěistributor or the factorLJ for assistancĞ ďĞĨŽƌĞ ŝŶƐƚĂůůŝŶŐ ƚŚĞ ǀĂlǀe.6.1.3.Look for anLJ sƉĞcial ǁĂƌŶŝŶŐ tĂŐs or ƉůĂtes aƩacŚĞĚ to or accomƉĂnLJiŶŐ ƚŚĞ ǀĂůǀĞ ĂŶĚ ŝĨ ĂŶLJ͕ ƚĂkeĂƉƉƌŽƉƌŝĂƚĞ ĂcƟŽŶ.6.1.4.VAHN-TECH /ŶƚĞƌŶĂƟŽŶĂů dD s ĂƌĞ ďi-ĚŝƌeĐƟŽŶĂů ǀalǀes anĚ can be installeĚ ĨŽƌ ŇŽǁ ŝŶ ĞŝƚŚĞƌ ĚŝƌĞĐƟŽŶs.
www.vahn-tech.com6.1.5.Valves can be mounted in a horizontal ( with stem upwards only ) or verƟĐĂů posiƟŽŶ ĚĞƉending onWŝƉĞůŝŶĞ ƌŽƵƟŶŐ͕ s ,EͲd , ĚŽĞƐ ŶŽƚ ƌĞĐŽŵŵend installing the valve with the actuator on theunderneath side because dirt in the pipline may enter the body cavity and damage the gland packing.&ŝŐ͘ ϯ͘ s ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů Ăůů sĂůǀĞ ŝŶƐƚĂůůŝŶŐ ŽŶ ƉŝƉĞůŝŶĞ6.1.6.It is recommended to remove all foreign parƟcles from the pipe line by ŇƵshing it with a suitableŇƵŝĚ͘ ŽƌƌŽsion inhibitors sŚĂůů ďĞ ĂĚĚĞĚ ƚŽ ƚŚĞ ŇƵshing medium to prevent any corrosion due totrappeĚ ŇƵŝĚƐ͘ hd/KE If valve is not cleaned or if cleaning is done onlLJ ĂŌĞƌ ǀalve installaƟŽŶ, valve caviƟĞs mayform a natural trap in the piping system and any impurity not dissolved or washed out by theŇƵƐŚŝnŐ ŇƵŝĚ ͬ ůŝŶĞ ŇƵŝĚ ŵĂLJ seƩle in such caviƟĞs and adversely ĂīĞct valve performance.6.1.7.Remove the end protectors and protecƟve sheath within the ŇŽǁ boree of the valve, whereverprovided.6.1.8. Ōer removal of end protectors, thoroughly clean valve ports ͬ cĂǀŝƟĞƐ ĂŶĚ ensure the ŇĂŶŐe gasketfaces are free from dust or debris. For cavity ŇƵshing procedure, refer secƟŽŶ 8.26.1.9.Gasket contact faces of the valve and pipe ŇĂŶŐĞs shall be inspected thoroughly for scratcheƐͬ defects. Scratches, if any, shall be corrected by grinding the surface or by rubbing with emery sheet.6.1.10. ŌĞƌ ĐůĞĂŶing, operate the valve for at least two complete cycles before installing.6.1.11. dŚĞ ǀĂlve shall be in the open pŽƐŝƟon during instalůĂƟŽŶ Ɖrocess, except in case of fail close valves,in which case addiƟŽŶĂů care shall be taken not to damage the ball surface by any debris.6.1.12. dŚĞ ƉŝƉes must be properly aligned and provisions made to minimize stresses from thermal expansŝŽŶ͘ ůǁays review pipe manufacturer's recomŵĞŶĚĂƟons.6.1.13. In cases of pipes with long overhangs, adequate supporƚͬjacks shall be proviĚĞĚ Ăƚ ƚŚĞ ŇĂŶŐĞ ĞŶdsof the pipe so as to avoid bending of pipes due to weight of the valve.6.1.14. ZĞĨĞƌ ƉƉĞŶĚŝx – B for special consiĚĞƌĂƟŽŶs to be taken during installaƟon of valves with extendedstem.6.2.Flanged ends6.2.1.Refer secƟŽn ϭ ĨŽƌ ĂƉƉůŝĐĂďůĞ Ɛƚandards.
www.vahn-tech.com6.2.2.Align the bolt holes of the valve eŶĚ ŇĂnge and piƉĞ ŇĂŶŐĞ͘6.2.3.Insert gasket (not supplied with the valvĞͿ ĂŶĚ ƟŐŚƚen the bolts. Flange bolts sŚĂůů ďĞ ƟŐŚƚenedevenly, using a torque wrench, in croƐƐ ƌŽƚĂƟŽŶ ƚŽ Ɖƌevent damage ƚŽ ŇĂŶŐes.6.2.4.Bolts should be lubricateĚ ĨŽƌ ĞĂƐĞ ŽĨ ŝŶƐƚĂůůĂƟŽŶ͘6.2.5.For sequence of ƟŐŚtening of bolts, refer secƟŽŶ A2.CAUTIONThe improper alignment of the pipe and the valve during installĂƟŽŶ Đan lead tounbalanĐĞĚ ƟŐŚƚĞŶŝŶŐ ŽĨ ƚŚĞ ŇĂŶŐes which may cause excessive stress on the bolts andlead to leakage.6.2.6.For largeƌ ŇĂŶŐĞĚ valves, which are provided with foot support, supporƟŶŐ base / pedestal shallbe placed beneath the valvĞ ĂŌĞƌ ƚŚĞ ĂůŝŐŶŵĞŶƚ ĂŶĚ ďŽůƟŶŐ ŽĨ ƚŚĞ ƉŝƉĞ ĂŶĚ ƚŚĞ ǀĂlvĞ ŇĂŶŐĞƐ. Thefoot support need nŽƚ ďĞ ďŽůƚĞĚ ƚŽ ƚŚĞ ŇŽŽƌ͘6.3.Welded ends6.3.1.Refer seĐƟŽn A1 for applicable standards.6.3.2.Pipe ends must be machined to make them smooth, clean and free from burrs.6.3.3.Keep the valve in open posŝƟŽŶ before installaƟŽŶ. If the valve must remain in the closeĚ ƉŽƐŝƟonextra care should be exercised to avoid weld ƐƉĂƩĞƌ ĨĂůůŝng on the ball surface.6.3.4.Alignment of the valve with the pipe must be as accurate as possible so as to get most favorableconĚŝƟŽŶ ĨŽƌ ǁĞld depoƐŝƟŽŶ͘6.3.5.All welding should be in accordance with any code or jurisdiĐƟŽŶĂl regulĂƟŽns applicable to theconstrucƟŽŶ of the piping system.CAUTIONTemperature in excess of 100 C in the seat ring area will result in seat damage. TemperaturĞ ŝŶĚŝĐĂƟŶŐ Đƌayons or laser temperature indicators shall be used to monitor andcontrol the temperature in this area during welding.DO NOTDo not stress-relieve welds as the temperature in the S O-ring seal region can exceed100 C, leading to failure of seals. If stress relieving is required as per the piping code, thevalve shall be purchased with tranƐŝƟŽŶ ͬ ƉƵƉ ƉŝĞĐes.6.4.Cleaning and dĞƐƟŶg6.4.1.Clean the pipeline by Ňushing the system with a cŽŵƉĂƟďůĞ liquid, to remove any dry contaminants,sand, dirt etc. that may be present so as to avoid any minor leakages due to scratches formed onthe sealing surfaces by these contaminants6.4.2.While tesƟŶŐ the pipeline ensure that the media is clean and free from sand, dirt, pebbles etc. Addcorrosion inhibitors to ƚŚĞ ƚĞƐƟŶŐ media to avoid any internal corrosion of the valve.6.4.3. Operate the valve once to check for smooth opeƌĂƟon.6.4.4.If no obvious problems are observed, the test pressure may be applied and leĂŬ ƟŐŚƚŶess andoperability may be checked.
www.vahn-tech.comCAUTIONFaulty installaƟŽŶ ŵĂLJ ůĞad ƚŽ ǀĂůǀĞ and/Žƌ ƉŝƉĞůiŶĞ ĚaŵĂŐĞ͘ ǀŽŝĚ ĐŽŶƚaĐƚ ǁŝƚŚ ƚŚĞ ǀĂlǀĞ ĐůŽsƵƌĞ ĞůĞŵĞŶƚ ĚƵƌiŶŐ ĐLJĐůiŶŐ͘ ƵƌŝŶŐ ƐŚĞůů ƚĞsƚ͕ ƚŚĞ ǀalǀĞ shall ďĞ in ƉĂƌƟĂůůy ŽƉĞŶ ƉŽsiƟŽŶ sŽ as tŽ ƉƌĞǀĞŶt tŚĞ sĞĂtfƌŽŵ ďĞŝŶŐ sƵďũĞĐƚĞĚ tŽ tŚĞ sŚĞůů tĞst ƉƌĞssƵƌĞ͘CHECK/ŶƐƚĂůůĂƟŽŶ ŽĨ ƚŚĞ ǀĂůǀĞ ĂƐ ƉĞƌ ƚŚĞ ƉŝƉŝŶŐ ĚƌawinŐ͘EnĚ ƉƌŽƚĞĐƚŽƌƐ aƌĞ ŶŽƚ ƌĞŵŽǀĞĚ ďĞĨŽƌĞ ŝŶƐƚĂůlĂƟŽn͘ 'ĞnĞƌĂů ƉiƉĞ ĂŶĚ ǀĂlǀĞ ĐůĞanlinĞss͘FaĐĞ ƚŽ ĨĂĐĞ ͬ ĞŶĚ ƚŽ ĞŶĚ ĚŝŵĞŶsiŽŶƐ͘CŽŶĨŽƌŵaŶĐĞ ŽĨ ƉŝƉiŶŐ ĐŽnnĞĐƚŽƌƐ ǁitŚ ƌĞůĞǀĂŶƚ ƐtandaƌdƐ Žƌ nŽƌŵsPaƌĂůlĞůŝƐŵ ŽĨ ƉŝƉŝŶŐ ŇĂnŐĞƐ Žƌ ƉŝƉŝnŐ ĐŽnnĞĐƚŽƌƐ AliŐŶŵĞŶƚ ŽĨ ƚŚĞ ďŽůƚ ŚŽůĞƐ ŽĨ ƚŚĞ ƉŝƉĞ ĂŶĚ ǀĂlǀĞ ŇaŶŐĞƐ͘ &Žƌ ƚŚĞ ĂǀĂŝlaďŝůŝƚLJ ŽĨ ƐƵĸĐiĞŶƚ ƐƉĂĐĞ and its ĂĐĐĞsƐŽƌŝĞƐ ĂŶd ĨŽƌ ĞĂƐLJ ŽƉĞƌĂƟŽŶ͘dŚĞ suitabiůŝƚLJ ĂŶĚ ĞĸĐŝĞŶĐLJ ŽĨ ǀĂlǀĞ aŶĚ ĂĐĐĞƐƐŽƌiĞƐ ƐƵƉƉŽƌƚƐϳ͘ s s KW Z d/ONϳ͘ϭ͘ 'ĞŶĞƌĂlϳ͘ϭ͘ϭ͘KƉĞƌĂƟŽŶĂů ůifĞ ŽĨ ƚŚĞ ǀĂůǀĞ ĐĂŶ ďĞ ŵĂdžŝŵinjĞĚ ŝĨ ƚŚĞ ǀĂůǀĞ is ƵƐĞĚ within tŚĞ ƌĂtĞĚ ƌĂŶŐĞ, inĂĐĐŽƌĚĂŶĐĞ wŝƚŚ ƉƌĞƐƐƵƌĞ͕ ƚĞŵƉĞƌĂƚƵƌĞ͕ ĂŶĚ ĐŽƌƌŽƐŝŽŶ ĚĂƚĂ͘ϳ͘ϭ͘Ϯ͘&Žƌ ƵnĚĞƌƐƚaŶĚŝŶŐ ƚŚĞ ŝŶƚĞƌnal ĐŽŶstƌuĐƟŽŶ ƌĞfĞƌ ƚŽ thĞ ŐĞŶĞƌĂů ĂƐƐĞŵďůLJ ĚƌĂǁŝŶŐ Žf tŚĞ ǀĂůǀĞ͘CAUTIONdƌƵŶŶŝŽŶ DŽƵŶƚĞĚ Ăůů sĂlǀĞs ĂƌĞ ƋuĂƌtĞƌͲƚuƌn ǀĂůǀĞƐ͕ ŝ͘Ğ͕͘ ϵϬ ƌŽtĂƟŝŽŶ ŽĨ ƚŚĞ ďĂůů ŵĂŬĞsƚŚĞ ǀĂlǀĞ ĞŝƚŚĞƌ ĨƵůůLJ ŽƉĞŶ Žƌ fƵůůLJ ĐlŽƐĞĚ͘s ,EͲd , /ŶƚĞƌŶĂƟŽŶĂů dE s ĂƌĞ ŶŽƚ ŝŶƚĞŶĚĞĚ ĨŽƌ tŚƌŽƩůŝŶŐ sĞƌǀiĐĞ͘ dŚĞƐĞ ǀĂlǀĞƐ ƐŚĂůů ďĞ ƵƐĞĚ ĨŽƌ ĨƵůů ŇŽǁ ŽĨ ŇƵŝĚ ĂŶĚ ͬ Žƌ ĨŽƌ ĐŽŵƉůĞtĞ shuƚͲŽī Žf tŚĞ ůŝŶĞ ŽŶůy͘ UsĞ Žf ƚ
5. VALVE HANDLI NG & STORAGE 5.1. Handling 5.2. Storage 2 2 4 6. VALVE I NSTALLATION 6.1. General 6.2. Flanged ends 6.3. Welded ends ò X ð X o v ] v P v d v P 4 4 6 6 7 7. VALVE OPERATION 7.1. General 7.2. Act µ } v 7.3. Sealing 7.4. Cavity relief 7.5. Sealant Charging 7 8 8 9 9 9 9 9 7 .5 1. 7 .5 2. Stem Seat 7.6. Fire Safety 8. PERIODI C MAINTENANCE
