DeZURIK
D10322
Page 6
November 2020
Operation
Clockwise rotation of the valve shaft closes the disc into the seat. A line on the top of the valve shaft
indicates the position of the disc when the disc is not visible.
The valve is fully closed when the flat side of the disc is parallel with the flange sealing surface on the
body. The valve is fully open when the disc is 90° counterclockwise from the closed position.
Note:
On sizes 5" (125mm) and larger, the closed disc must not touch the stop lug in the body.
The actuator is connected to the valve shaft and positions the disc at the open, closed or intermediate
positions. The position stops in the actuator are set to match the open and closed positions of the valve.
Note:
Refer to the actuator instructions for stop adjustment information.
Required Tools
The valve is assembled using only SAE fasteners. To service this unit, you should have a full set of
combination wrenches, Allen wrenches, a flat tipped screwdriver, a pin punch and a dead blow hammer.
Lubrication
The valve is lubricated at the factory and does not require routine lubrication. Refer to the actuator
instructions for actuator lubrication requirements.
Adjusting Packing
The shaft seal consists of packing that is contained and compressed by the packing gland (A12).
1. If the packing leaks, tighten the two adjustment nuts (A15) on top of the packing gland (A12).
Note:
Tighten the nuts evenly and gently
—just enough to stop the leak. Over tightening will
cause excessive torque and decrease packing life.
2. If the leak cannot be stopped by tightening the packing, replace the packing. See "Replacing
Packing" section.