The new type of breather valve is a major safety device installed on fixed-top storage tanks for crude oil, gasoline, kerosene, light diesel oil, aromatics, etc. It serves to prevent evaporation loss and protect the storage tank from damage when it is under overpressure or vacuum. This valve is usually used in conjunction with a flame arrester
Main features：
This valve features a large ventilation volume, excellent sealing performance, low leakage, and corrosion resistance.
Main technical parameters-Operating pressure：
Class A positive pressure :355Pa(36 mm water column) Negative pressure :295Pa(30 mm water column)
Class B positive pressure :980Pa(100 mm water column) Negative pressure :295Pa(30 mm water column)
Class C positive pressure :1765Pa(180 mm water column) Negative pressure :295Pa(30 mm water column)
