According to the national standard "petrochemical enterprise design fire code" (GB50160-92) provisions: "a, B liquid fixed roof tank, should be equipped with flame arrester and breathing valve". Visible breathing valve, flame arrester is an indispensable safety facilities tank. The utility model not only can maintain the pressure balance of the storage tank, ensure the storage tank is protected from overpressure or vacuum, but also can reduce the volatilization and the loss of the medium in the tank. I produced the valve, with a compact structure, large ventilation, small leakage, good sealing performance and other characteristics.
Stainless steel breathing valve is a model of mechanical breathing valve, but the material is stainless steel, stainless steel materials are 304, 316, etc..
Stainless steel breathing valve is an important annex to protect the safety of oil tanks, installed in the roof of the tank, the pressure valve and vacuum valve consists of two parts. Its role in general, to maintain the tightness of the tank, to some extent, reduce oil evaporation loss. When necessary, it can automatically regulate the pressure inside and outside the balance tank and play a safe role on the oil tank.
When the gas pressure inside the tank is greater than the allowable pressure tank, oil pressure steam through the valve leakage, the vacuum valve is closed; when the gas pressure inside the tank is less than the allowed tank vacuum, fresh air into the tank through the vacuum valve, the pressure valve in the closed state, allowing the pressure (or vacuum) by the adjusting disk weight control.
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