Breathing Valve Working Principle

The breathing valve uses a spring limit valve plate, which is determined by positive and negative pressure to exhale or inhale. Its working principle: When the pressure in the storage tank is balanced with the atmospheric pressure, the exhalation valve disc of the breathing valve closely matches the exhalation outlet valve seat, and the suction valve disc closely matches the suction port valve seat. When the pressure in the tank exceeds the atmospheric pressure value (that is, excessive positive pressure is generated), the high pressure in the tank will directly act on the bottom of the breathing valve and overcome the gravity of the valve and the external air pressure acting on the valve, thereby opening the breathing valve. The valve disc discharges the excessive air pressure in the tank through channel A to keep the pressure in the tank balanced with the atmospheric pressure. When the pressure in the tank is lower than the atmospheric pressure (that is, too low negative pressure is generated), the atmospheric pressure enters through the suction channel B and directly acts on the bottom of the suction inlet valve disc, overcoming the gravity of the valve disc and acting on the tank above the valve disc. pressure, thereby opening the suction valve to add pressure to the tank, so that the pressure in the tank is balanced with the atmospheric pressure. Usually when a fire occurs, the fire source may spread into the storage tank through the inlet. When the flame passes through the narrow pores of the fire-resistant core layer in the breathing valve, due to the wall effect, the corrugated plate absorbs a large amount of heat source, causing the heat loss to suddenly increase. large, thereby extinguishing the flame.