Custom processing: Brand: YN Model: A28Y / H valve opening height: Full lift safety valve structural form: Leveraged Connection: thread Material: HT200 ZG1Cr18Ni9Ti CF8M Nominal Diameter: DN15 --- DN65 Medium: water and oil product steam and other standards: A28Y / H flow direction: one-way parts and accessories: Parts form: angular pressure environment: atmospheric type (channel position): rectangular style body structure: Closed Specifications: 1 A28H / Y type applicable the working temperature of air, steam, water, nitrogen and hydrogen mixed gas and other media equipment or pipeline ≤200 ℃ of. A28Y-P / R is suitable for the working temperature ≤200 ℃ have equipment or pipeline corrosive media, as the overpressure protection device. The main component material NO. Part Name A28H material A28Y-P material A28Y-R8 material Body HT200 ZG1Cr18Ni9Ti CF8M 2 1 35 ZG1Cr18Ni9Ti CF8M 3 Seat adjustment ring 2Cr13 1Cr18Ni9Ti 316 4 valve 2Cr13 1Cr18Ni9Ti 316 5 fluorine plastic coated spring 50CrVA 50CrVA 50CrVA fluorine plastic-coated stem 2Cr13 2Cr13 316 7 6 adjustment screw 45 2Cr13 316 8 guard ZG200-400 ZG200-400 CF8M sealing surface material surfacing D507 surfacing Co based alloy dimensions and connecting dimensions nominal diameter DN ( mm) Dimensions do RGL L1 ≈H 15 10 1/2 "3/4" 37 65 196 20 12 3/4 "1" 40 70 215 25 15 1 "1 1/4" 45 78 233 32 20 1 1/4 "1 1/2" 609030440251 1/2 "2" 6710532550322 "2 1/2" 7611534665402 1/2 "3" 110 145 372