The working principle of fire-resistant breathing valve in pipeline is to use spring limit valve plate, which can determine whether to breathe or inhale by positive and negative pressure. The breathing valve should have the functions of releasing positive pressure and negative pressure. Specifically, when the container is under positive pressure, the breathing valve will open the exhaled gas to release the positive pressure; when the container is under negative pressure, the pipeline fire-retardant breathing valve will open the suction gas to release the negative pressure. This allows the pressure to be within the range and allows the vessel to operate normally. One is to breathe or inhale when pressure is reached. The other is designed to breathe but not inhale. It can be understood that it is replaced by two check valves with proper pressure. The fire resistant breathing valve can not only maintain the pressure balance of the tank, but also reduce the medium and loss in the tank. This kind of valve should be installed horizontally in the pipeline.
Pipeline fire-retardant breathing valve is used to install the main breathing valve equipment on fixed roof storage tanks such as crude oil, gasoline, kerosene, light diesel oil, aromatics, etc. Pipeline fire-resistant breathing valve plays the role of evaporation loss and protection of storage tank from damage under overpressure or vacuum. Pipeline fire-retardant breathing valve also has the characteristics of large ventilation, good sealing performance and small leakage.
