The valve is used in pressure vessel piping systems.Stainless steel hand type high pressure vessel explosion-proof one-way exhaust valve protection function, when is higher than the set pressure (standard 2 bar) can exhaust, whereas closed, at the same time can also meet the demand in all kinds of production process, to adjust the pressure, the valve in stainless steel material, health design, content with a variety of food processing, beer, beverage and pharmaceutical and other industries.