The residual pressure valve can be widely used in purification workshop or clean room to maintain the positive pressure difference between indoor and outdoor, so as to discharge the indoor excess air and prevent the invasion of outdoor air.
Its working principle: when the air pressure in the purification room exceeds the standard air pressure, the pressure reducing valve will open automatically. When it is lower than the standard air pressure, the valve will return to the closed state, so as to balance the air pressure. To prevent the noise and possible burst caused by the compression of air pressure in the purification room. There are many types of residual pressure valve, and there are subtle differences in different applications.

Characteristics of residual pressure valve
1. It has the advantages of close closing, sensitive response, convenient adjustment, beautiful appearance and no energy consumption.
2. The installation form is wall mounted, and the wall thickness can be adjusted within 30 ~ 50mm.
3. The position of heavy hammer can be adjusted according to the requirements of air volume and pressure difference.
4. Surface painting or electrostatic spraying (the color of spraying is generally white, which can also be specified by the user). If there are other requirements, the order should be stated. Different specifications can be made according to the needs of users. Generally, it should be used together with differential pressure gauge. It can be customized according to the size.
5. In order to prevent the clean room from being polluted, the positive pressure must be maintained in the room. If the pressure in the clean room is too high, the door leaf is not easy to open and close, so the pressure relief door is used to maintain the micro positive pressure in the clean room. The air volume through the pressure relief valve is generally between 100-1200m3 / h, and the pressure difference is maintained between 5-40pa.

Function of residual pressure valve
◇Maintain positive pressure in air-conditioned room;
◇Closed tightly and responsive;
◇The positive pressure value is easy to adjust and does not consume energy