Working principle of pneumatic shut-off gate valve

    From the structural point of view, it is a classification of simple gate valves, and its function is indeed not much different from ordinary gate valves, and they are all used as cutting-off media. Pneumatic execution methods are also relatively common in gate valve products, so why should a category of pneumatic shut-off gate valves be listed separately?

    To understand why pneumatic shut-off gate valves are listed separately, the first thing you need to understand is its working principle. The working principle of the pneumatic shut-off gate valve is similar to that of the ordinary gate valve. The gate is lifted and lowered by the torque transmitted by the pneumatic actuator, so as to cut off the medium. At first glance, this principle is not different from ordinary gate valves, but those who have knowledge of pneumatic gate valves will find that ordinary gate valves ignore the effect of compressed air brought by the pneumatic actuator on the internal medium when they are closed. Affected. But the pneumatic shut-off gate valve is different. In order to be able to completely shut off, rather than just blocking, the gate of the pneumatic shut-off gate valve will correspondingly block a part of the compressed air brought by the pneumatic actuator from entering the cavity to affect the fluctuation of the medium. Therefore, when the pneumatic shut-off gate valve is cut off (ie, closed), the internal medium runs relatively smoothly, which also makes the pressure on the gate of the pneumatic shut-off gate valve to a certain extent smaller.