Pneumatic valve by the cock

Pneumatic valve has evolved by the plug valve, pneumatic valve and plug valve is belong to one type of valve, only its closure is individual, body around the center line of the valve body rotation to achieve a kind of open and close the valve. Pneumatic valve is evolved by the cock. It has the same rotation movement, different is the cock body is a body, has a circular hole or channel through its axis. Surface and the proportion of the gangway, namely when the rotation, should all present in the inlet and outlet, thereby blocking flow. This kind of valve can be installed in any position in the pipeline. The structure of the pneumatic valve classification, can be divided into the form of the structure, floating pneumatic valve, pneumatic valve body is floating, under the effect of medium pressure, the physical ability produce certain displacement and compression at the outlet seal surface, guarantee the outlet seal. Floating pneumatic valve has simple structure, good sealing, but body work under medium load all passed export seal, so want to consider the medium of the seal material can withstand the working load. In this structure, it is widely used in low pressure valve.