How to adjust the valve stem valve leakage?
Connect the cylinder and the stem, screw down and lengthen the screw, it will not leak.
4, in the valve seat; the actuator stiffness is too small; 5, the valve before and after the pressure is too large; 6, the valve positioner failure; 7, diaphragm or gas path pipeline leakage.
The valve leakage is 1, the spool and the valve seat sealing surface wear, grinding or replacement; 2, 3, the stem is too short; there is a foreign body card in
