The vacuum valve is the requirement that the valve plate pressing device should meet the requirements.

The vacuum valve is the requirement that the valve plate pressing device should meet.

a. The valve plate does not produce lateral movement when the gasket is pressed. Because the lateral movement will hurt the gasket;

b. The pressing position should be coincident, that is, pressed at the same position every time it is closed. Only in this way can the valve closing performance be stabilized. Metal pad valves are strict with this, and the pads are less;

c. Balance the gasket tightly. Because the pressure is not evenly pressed, the sealing may not be tight; d. It must be self-locking after pressing, otherwise there must be power to maintain the pressing state;

e. The degree of compression must be adjustable because the gaskets have certain manufacturing tolerances and must be adjusted to compress.