Single Breather Valve

Nominal Size:DN25~DN300
Nominal Pressure:
● Positive Pressure:355Pa~1765Pa
● Negative pressure:295Pa

Suction Nozzle Flame Arrester 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 put something into the storage tank, inside pressure will be increased a certain value, and the positive pressure disc will be opened automatically to exhale gases. Otherwise, it occurs negative pressure, the  negative pressure disc will inhale air.