All-weather explosion-proof breathing valve is a ventilation device installed on the fixed roof tank, which is mainly used to reduce the evaporation loss of oil, control the pressure of the storage tank, and has the function of fire resistance and explosion protection.
The all-weather explosion-proof breathing valve is widely used in urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection and other fields, especially suitable for storing Class A oil with flash point below 28 ° C and Class B oil with flash point below 60 ° C, such as gasoline, kerosene, diesel, crude oil and so on.
Large ventilation and small leakage: the all-weather explosion-proof breathing valve is reasonably designed to ensure the gas flow inside the storage tank, while reducing leakage and maintaining the safety of the storage tank.
Good corrosion resistance and antifreeze performance: the valve body material is usually made of stainless steel, cast steel or aluminum alloy and other corrosion resistant materials,Breather Valves and the valve disc is made of low temperature resistant materials such as tetrafluoroidal materials to ensure that it can work normally in cold areas.
Fire-proof and explosion-proof: The all-weather explosion-proof breathing valve is equipped with a fire-proof layer, which can effectively prevent the external flame from passing into the storage tank and improve the safety of the storage tank.
Electrostatic grounding: electrostatic grounding wire is provided to keep the valve and tank equal potential to prevent the accumulation of static electricity causing fire or explosion.
Working principle
Negative pressure work: When the medium in the tank is reduced and the upper gas space pressure drops to reach the operating negative pressure of the breathing valve, the atmosphere outside the tank will open the negative pressure valve disc of the breathing valve,Breathing manhole Emergency pressure relief valves so that the outside gas enters the tank to maintain the pressure balance in the tank.
Positive pressure work: When the medium in the tank increases and the upper gas space pressure rises to the operating positive pressure of the breathing valve, the pressure valve is pushed open and the gas escapes from the breathing valve outlet to prevent the pressure in the tank from being too high.
All-weather explosion-proof breathing valve structure chart：
