The role of fire-stop explosion-proof breathing valve

1. The fire-resistance and explosion-proof breathing valve is installed at the highest point of the double-layer oil tank to facilitate the reduction of material evaporation loss and maintain the air pressure balance inside and outside the oil tank. For general vertical oil tanks, the fire-resistant and explosion-proof breathing valve is installed in the center of the top of the tank; for pressure vessels that require a thermal insulation layer on the tank top, the fire-resistant and explosion-proof breathing valve can be installed near the ladder platform.

2. When the fire-resistance and explosion-proof breathing valve leaves the factory, the flange sealing surface adopts a plastic protective cover to avoid damage to the flange sealing surface during transportation. The flange protective cover must be removed when the goods are installed on site, and then installed vertically in double oil The top of the canister. Fire retardant and explosion-proof breathing valve cannot be placed horizontally or upside down,

3. The breathing valve installed on the oil tank is generally used for 1-3 months. It is necessary to regularly check whether the positive and negative pressure valve disc of the breathing valve is flexible. The breathing valve will emit a "hiss-hiss-hiss" pressure relief discharge during normal operation. Otherwise, you need to open the valve cover on the top of the breathing valve and check whether the valve disc of the breathing valve is "chuck". Whether there is dirt on the guide rod, and clean the dirt in time to ensure that the guide rod runs freely. Whether the seat sealing surface is worn or not, it needs to be replaced immediately to ensure the normal and safe operation of the breathing valve. 4. The positive and negative pressure valve disc of the fire-resistance and explosion-proof breathing valve changes up and down according to the rise and fall of the pressure in the oil tank. When the fire-resistant explosion-proof breathing valve has been used for three years, it is generally necessary to replace the inner valve disc, guide rod and valve seat sealing surface of the fire-resistant explosion-proof breathing valve to ensure the normal operation of the fire-resistant explosion-proof breathing valve and maintain the double-layer oil tank. safe operation.

The fire-stop explosion-proof breathing valve integrates the fire-stopper and the breathing valve. It is a new type of safety equipment necessary for petrochemical storage tanks. Its biggest advantage is the choice of cast steel and aluminum alloy with good corrosion resistance; the corrugated fire-stop layer (core) is made of stainless steel. The fire-resistance performance is good. The fire-resistance explosion-proof breathing valve can not only maintain the pressure balance of the storage tank to ensure that the oil tank is damaged under overpressure or vacuum, but also reduce the medium and loss in the tank. Suitable for storage of Class A oil products with a flash point below 28°C and Class B oil products with a flash point below 60°C, such as gasoline, benzine, toluene, kerosene, light diesel, engine oil, crude oil and other oil products with the same properties Used for pressure vessels of chemical products, it works normally in the temperature environment of -35℃-60℃.