A27H is suitable for equipment or pipeline water, air, steam and other media operating temperature of ≤200 ℃. A27Y applicable to operating temperature ≤200 ℃ have equipment or pipeline corrosive media, as the overpressure protection device. The main component material NO. Part Name A27H material A27W-P material A27W-R material 1 Body HT350 ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti 2 seat 35 ZG1Cr18Ni9Ti ZG1Cr18Ni9Ti 3 adjusting ring 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti 4 valve 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti 5 fluorine plastic coated spring 50CrVA 50CrVA 50CrVA fluorine plastic-coated stem 2Cr13 2Cr13 1Cr18Ni9Ti 7 6 adjustment screw 45 2Cr13 1Cr18Ni9Ti 8 guard ZG200-400 ZG200-400 1Cr18Ni9Ti sealing surface material surfacing D507 surfacing Co based alloy dimensions and connecting dimensions nominal diameter size do Rc L L1 GH 15 10 1/2 "40 65 1/2" 135 20 15 3/4 "45 70 3/4" 140 25 20 1 "45 76 1" 155 32 25 11/4 "55 85 11/4 "1704032 11/2" 5585 11/2 "31050402" 671002 "3226550 21/2" 76112 21/2 "34480653" 1101353 "395 Quality of Service Commitment Our company according to ISO9001 international quality system certification requirements, management, production valve business, for every aspect of the production process valve are to develop a series of detailed technical rules and strict control. In the factory have carried out strict inspection and pressure test, so that the "clear positive" product quality has been a reliable guarantee. When you buy "Mingzheng valve" when goods and services have been associated with you, we solemnly pledge to you. Products sold within a year if quality problems, the company promises "Three Guarantees" service; namely repair, replacement or return; allowing you to enjoy a complete service, rest assured purchase! We are ready to provide technical support nationwide coverage to any user of a city, any product issues raised by users, we will be analyzed and answered within 12 hours. If you need service, our service personnel will arrive at the customer site within 24 hours, the problem is not resolved not to leave! I also life-long technical support for the product, will regularly send sell consulting services by service personnel. Our confidence comes from your approval, your satisfaction is our greatest wish!