The performance of the piston of pneumatic valve

piston pneumatic valve by the pneumatic valve, pneumatic valve cover, stem, plunger, the hole planes, sealing ring, hand wheel, etc. When the hand wheel rotation, through the pneumatic valve pneumatic valve rod drives the plunger plunger in the middle of the hole rack up and down reciprocating movement to complete the pneumatic valves open and close function. Plunger pneumatic valve main performance are the following:
. Pneumatic device rated output force or moment should comply with the provisions of GB/T and GB/T.
　　. Pneumatic valve plunger under no-load condition, to enter in the cylinder pressure as stipulated in the table, the movements should be smooth, no jam and crawl phenomenon.
　　. Pneumatic valve in the plunger. MPa air pressure, pneumatic device in two directions at opening and closing the output torque and thrust, its value should not be less than the value of pneumatic device sign marked, and action should be flexible, does not allow each part appears permanent deformation and other anomalies.
　　. Plunger pneumatic valve sealing experiment using maximum working pressure, leak out of the amount of air from one side of their back pressure does not allow more than ( +。 D） cm/min（ Standard state) ； Out of the end cover, the output shaft leakage air volume does not allow more than ( +。 d） 厘米/分钟。
　　. Plunger pneumatic valve strength test. Times the maximum working pressure test, and maintain test pressure after min, the cylinder end cover and static sealing parts are not allowed to have leakage and structural deformation.
　　. Plunger pneumatic valve life times, pneumatic device simulation of pneumatic valve action, while keeping the output torque or thrust in the direction of two cases, the opening and closing operation of the opening and closing times shall be not less than ( Rev. - Once closed loop for) 。
　　. Plunger pneumatic valve with buffer mechanism of pneumatic device, when the piston movement to the visit terminal location, impact phenomenon is not allowed