Do you know the pneumatic valve is evolved by the globe valve

Pneumatic valve is evolved by the globe valve. 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 opening ratio should be such, that when the rotation at the inlet and outlet shall all be present surface, thereby cutting flow. Pneumatic valve and plug valve is belong to one type of valve, only its closure is the individual, body around the center line of the valve body rotation to achieve a kind of open and close the valve. The working principle of pneumatic valve is love by rotary valve to keep the valve open or occlusion. Pneumatic valve switch lightweight, small size, can make it big caliber, reliable sealing, simple structure, convenient maintenance, and facial sealing surface often in the closed state, not easily be medium erosion, has been widely used in various industries. A, easy to switch quickly to meet on line with quick opening, fast closed conduits required high places. Second, the fluid resistance small, whether it's full size reducing valve are all valve fluid resistance in the smallest one. Three, reliable seating, the common seal is adopted tetrafluoroethylene type other plastic better a polymeric material manufacturing, have higher request for seal, soft seal is easier to ensure sealing, metal sealing, < > hard seal structure can bear with the Npa, the Npa, the Npa high pressure can be high temperature ℃ in our daily life. Fourth, reliable stem seal, valve stem's sealing structure can along with the increases with the increment of medium, the denier valve open/close the valve rod make rotation movement only, and not of deeds lifting movement. The sealing filler of the valve stem is not easy to damage. The sealing of the valve stem significantly longer service life. Five, the service life is long, pneumatic device in destructive tests above. Because the sealing parts of valve is used more is good self-lubrication material of ptfe gas such as materials and the valve, the valve stem friction and wear are the youngest, ensure the service life of the valve.