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Spring fully open and closed safety valve

Products > Safety valve > Spring fully open and closed safety valve

Spring fully open and closed safety valve

Model: A42F-25
Nominal diameter: DN20 ~ 400mm
Nominal: PN1.6 ~ 10.0MPa
Operating temperature: ≤300 ℃
body material: steel, forged steel, stainless steel
air, LPG and liquid: Medium
Applications : Suitable for chemical, petrochemical, petroleum, papermaking, mining, electricity, Liquefied petroleum gas, food, pharmaceutical, water supply and drainage, municipal, mechanical equipment, electronics, urban construction and other fields
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Product Overview:
       A42F spring fully enclosed closed safety valve for a variety of light and heavy industry and building pipelines. Safety valves are widely used in: chemical, petrochemical, petroleum, paper, mining, electricity, liquefied petroleum gas, food, pharmaceuticals, water supply and drainage, municipal services, machinery and equipment support, electronics industry, urban construction and other fields. A42F spring fully enclosed closed safety valve for operating temperature ≤ 300 ℃ air, petroleum gas, liquid and other media equipment and piping. For working temperature ≤ 200 ℃ corrosive media equipment and piping, as overpressure protection device.


product nameA42F spring fully enclosed closed safety valve
Product numberA42F
Nominal diameterDN20-400
Pressure range1.6MPa-10.0MPa
Body materialCast steel, forged steel, stainless steel


The main parts and materials:

NO.Part NameA42Y-C / KA42Y-C materialA42Y-P / KA42Y-P materialA42Y-R materialDA42Y-P material
1Seat2Cr13 / 1Cr18Ni9TiZG1Cr18Ni9TiZG1Cr18Ni12Mo2TiZG1Cr18Ni9Ti
2BodyWCBZG1Cr18Ni9TiZG1Cr18Ni12Mo2TiLCB / ZG1Cr18Ni9Ti
3Adjustment ring2Cr13 / 1Cr18Ni9Ti1Cr18Ni9Ti1Cr18Ni12Mo2Ti1Cr18Ni9Ti
4Backlash plate2Cr13 / 1Cr18Ni9Ti1Cr18Ni9Ti1Cr18Ni12Mo2Ti1Cr18Ni9Ti
5Disc2Cr13 / 1Cr18Ni9Ti1Cr18Ni9Ti1Cr18Ni12Mo2Ti1Cr18Ni9Ti
6Guide sleeve2Cr13 / 1Cr18Ni9Ti1Cr18Ni9Ti1Cr18Ni12Mo2Ti1Cr18Ni9Ti
7capZG230-450ZG230-450ZG230-450ZG1Cr18Ni9Ti
8spring50CrVA50CrVA coated fluoroplastic50CrVA coated fluoroplastic50CrVA
9Valve stem2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti1Cr18Ni9Ti
10Adjust the screw452Cr132Cr132Cr13
11BonnetZG200-400ZG200-400ZG200-400ZG230-450
12Sealing surface materialSurfacing Co-based cemented carbide