88-Type Breather Valve is used to install the main safety equipment on fixed roof storage tanks such as crude oil, gas oil, kerosene, light diesel oil, aromatic hydrocarbon, etc. to prevent evaporation loss and to protect the storage tank against over-pressure or vacuum. When the material is injected into the storage tank, and the pressure is increased to a certain value, the valve positive pressure plate will be opened automatically to exhale gas. Otherwise, the negative plate will be opened automatically to inhale gas. Generally, this breather valve is used with flame arrester together

Specification:

Nominal Size:DN20~DN250

Connection End: Flange / Threaded

End Standard:GB, GOST, EN, DIN, ANSI, API etc.

Operation Pressure:

? Positive Pressure:355Pa~1765Pa

? Negative pressure:295Pa

Application:Urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection etc.