Single suction valve also known as: tank breathing; tank breathing; small breathing discharge single suction valve working principle is to use spring limit valve plate, determined by positive and negative pressure or suction. 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 fire resistant breathing valve will open the inhaled gas to release the negative pressure. So that the pressure in the range, let the container normal. 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 single suction valve can not only maintain the pressure balance of the storage tank, but also reduce the medium and loss in the tank.
