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Safety overflow valve AY42H/HA802Y

Safety overflow valve AY42H/HA802Y

This valve serves as a pressure relief protection in the system. When the system pressure exceeds the specified value, the valve opens and releases a portion of the gas in the system into the atmosphere, ensuring that the system pressure does not exceed the allowable value and preventing accidents due to excessive pressure. The main parameter of this valve is displacement, which is determined by the diameter of the valve seat and the opening height of the valve disc. Depending on the opening height, it can be divided into two types: micro opening and full opening. Micro opening refers to the opening height of the valve disc being 1/40-l/20 of the valve seat throat diameter. Full opening refers to the opening height of the valve disc being 1/4 of the valve seat throat diameter. This valve is suitable for urban construction, chemical industry, metallurgy, petroleum, pharmaceuticals, food, beverage, and environmental protection.

Product drawing

Product drawing.png

Product dimensions

modelNominal Diametersize
DNDD1KMZ-ØdbLL1Rc≈H

AY42H-160/250/400

151359525M48×24×2225651401"329
2016511530M52×26×2628801501 1/2"447
2520014538M80×36×2940901802"485
3222517042M100×36×-33501002002 1/2"570
modelNominal Diametersize
DNRcZGLL1≈H
YA802Y-600151/2"1/2"5290250
251"1"52113275
4011/2"11/2"52157336

Technical Documentation

1.execution standard:GB/T 12243-2021

2.Structural length standard:GB/T12221-2005

3.Flange Standard:GB/T9113.1-2000

4.Test Standard:GB/T13927-2022

Product Parts List

serial numbernamematerial
1valve bodycarbon steel
2valve seatstainless steel
3valve discstainless steel
4valve coverwelded assembly
5spring50CrVA


Related Information

Wenbao Valve Co., Ltd

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