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Valveassembly Inordertomeettheneedofmodernpetroleumdrillingtechnology,newmudpimpfittings weredecelopedby Qingdaozhifengpetroleumequipmentco.,ltdthroughcooperation withchinapetroleumuniversity (huadong)whichhavegoodpropertiesofhightemperature, high pressureresistance,high antifrictionandantisulfurcorrosion. Highqualityalloysteelsabovepetroleumstandardsuchas20CrMnTi,20CrMnMo,20CrNiMo and20Cr2Ni4 wereusedtomakethevalveassembly,andnewlydevelopedhighmolecular materialstomakethemudpumpfittingsinordertoresisthigh-temperature,high-pressure,antifrictionandsulfurcorrosion.Thevalveassembly manufacturedbytsingtao zhifengpetroleumequipmentco.ltd rankstheinternationaltopclasslevel! OurcompanyistheoriginalfactoryinQingdaoPetroleumMachineryFactory, in2008we passed AmericanpetroleuminstitutequalitymanagementsystemofpreferenceAPISPECQ1(REGISRATIONNO.Q1-0637),ISO/TS29001(REGISRATIONNO.TS-0469)authentication and ISO9001:2000 (REGISRATIONNO.0885) internationalqualitysystem certification, Firstset Mainpartmaterials:20CrMnTi,valvesealring:JSR-220S. Characteristics:ordinaryanti-impactionandanti-compressionproperty Application:pumppressurearound18MPa,temperatureofcyclingmud≤60°C Secondset Mainpartmaterial:20CrMnTi,valvesealring:polynurethaneorpolyetherester Characteristics:goodantiimpactionproperty,ordinarytemperaturetolerance,poor antihydrolysisproperty Application:pumppressurearound20mpa,temperatureofcyclingmud≤80°C Thirdset Mainpartmaterial:20CrMnMo,ValvesealringTPF-2 Characteristics:excellentantiimpaction,abrasivewearandsulfurcorrosionproperty, goodstrengthat80-150°C Application:pumppressure20-30MPa,temperaturearound120°C Fourthset Mainpartmaterial:20CrNiMoor20Cr2Ni4,valvesealring:TPF-3 Characteristics:excellentantiimpactionandhightemperaturetoleranceproperty, Application:35MpaandhightemperatureandpumpF-1600HL, F-2200HL, excellentantisulfurcorrosion. Serial No. Valve rubber pump pressure /MPa Maximum operation temp-erature /°C Working temp-erature /°C Abrasion cm³/ 1.61km Service life/h (pump pr.≤18Mpa, temp≤ 60°C) Service life/h (pump pr.≥20Mpa, temp≥ 60-80°C) Service life/h (pump pr.≥26Mpa, temp≥ 80°C) Anti-sulfur corrosion remarks 1 NBR ≥18 120 50 0.06 200 150 100 ordinary 2 PUR ≥20 80 60 0.02 400 200 100 Ordinary 3 TPF-2 ≥26 260 180 0.01 600 500 350 excellent Applicable F-1600HL F-2200HL 4 TPF-3 ≥35 260 10 0.01 800 600 450 excellent API