Product Name: A28h Full Lift Safety Pressure Relief Valve Model NO.: A28H Material: Stainless Steel Structure: Spring Closed: Open Pressure: Adjustable Connection: Thread Temperature: Ordinary Temperature Certification: ISO, CE Standard: API 526 Media: Water Usage: Safety & Relief Pressure Name: A28h Full Lift Safety Pressure Relief Valve Face to Face: API 526, En558 or DIN 3202 Inspect & Test: API 527, DIN 3230 or ISO 5208 Trademark: Fly Transport Package: Plywooden Case Specification: 1"~6" Origin: China HS Code: 84814000 Product Description A28H Full lift safety pressure relief valvePerformance:Theallowabletoleranceofthesetpressure:<+/-3%ofthesetpressureOverpressure:<10%ofthesetpressureBlowdown:<15%ofthesetpressureTightness:thevalveshavegoodseattightness,conformstoAPI527Features:1)Thesolidnozzlescrewsintothebody.itsmaintenanceiseasy2)Theshapeofthedischolderhasbeendesignedtoenhancetheeffectofthefluidthrustforaninstantliftofthedisc3)Blowdowncontrolisprovidedwithadjustablenozzleringonly4)Theadequatematerialsandclearancebetweendischolderandguide,spindleandadjustingscrewassuresdisctoliftsuccessfully.5)ThesurfaceofboththediscandthenozleseatisdepsitedwithSTL.Excellentflatnesandsurfacefinishoftheseatingsurfacesbyprecisionmachiningandlappingassuresafetyvalvetohavehighdegreeofsealtightnessandlongusage6)Thebllowsofbalancedbellowssafetyvalvenotonlycanavoidandeffectofvariablebackpressureinthesystem,butalsocanprotectspringandothertrimcomponentsfromcorrosivemedia7)Thechoiceofmaterialiscareful.Themanufactureofthespringandthebellowshasstricttechnologicalprocess.Eachofthemistesedandcheckedstrictly.A28H-10 A28Y-10P A28Y-10R8 A28Y-25R8 A28Y-40R8 A28H-16 A28Y-16P A28Y-16R8 A28Y-25R8 A28Y-40R8A28H type are used for the equipment and pipeline of the air, N2, H2 mixed gas vapour etc.medium what the working temp-erature are less than 200 . A28Y-P/10R8 type are used for the equipment and pipeline of the quality with corrode medium what the working temperature are less than 200 . Take for extra pressure protedion devices.Explanation of materials for main partsNO.Name of partA28H MaterialsA28Y-P MaterialsA28Y-R8 Materials1 BodyHT200ZG1Cr18Ni9TiCF8M2 Nozzle35ZG1Cr18Ni9TiCF8M3 Adjusting ring2Cr131Cr18Ni9Ti3164 Disc2Cr131Cr18Ni9Ti3165 Spring50CrVA50CrVACoated Teflon50CrVACoated Teflon6 Stem2Cr132Cr133167Adjusting bolt452Cr133168 CapZG200-400ZG200-400CF8MSealing surface of materialD507Depositing D507CoDepositing stellite10Adjusting nutQ235-A2Cr131Cr18Ni12Mo2TiSealing surface of material"Y" CoDepositing stellite, "H" D507 Depositing D507, "W"bodyDimensions (mm)Nominal diameterDN (mm)Dimensions (mm)doRcGLL1H15101/2"3/4"376218920123/4"1"406519625151"11/ "4 4572277322011/ "15585312402511/ "2"6710032250322"21/ "2 76112348654021/ "3"11013537080503"4"110145410Factory CornerTest & InspectionFAQQ. Are you a trading company or a manufacturer?A: We are a manufacturer as you can see our workshop as above.Q. What is your payment term?A:Normally T/T 30% in advance, balance to be paid before delivery.Q: What is your main market?A:North America,Greenland,South America,Africa,Southeast Assia, Former Soviet Republics ,East Assia,and Europe.Q: Can I place sample order to your factory?A: Yes, Samples can be provided.Q:What kind of trade terms can you do?A:EX-WORKS,FOB,CFR,CIF,etc.Q: How long is your delivery time?A: Generally it is 5-7 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is accordijng to quantity.