88-Type Breather Valve

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

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