General

Plug valves are precision made items and should be treated with care in accordance with the instructions.

Plug valve torque / sealing adjustment

The setting of this valve depends on a balance between sealing through the ways and the maximum permissable torque of the actuator.
This plug valve has been adjusted for the correct seal / torque setting before dispatch.  Should the seal / torque setting require adjustment then the following procedure should be applied.

To improve sealing & increase torque setting

1) Release top cap approx 1/4 turn

2) Slacken locknut

3) Turn adjustment screw clockwise approx 5 degrees

4) Re-tighten locknut

5) Re-tighten top cap until the complete assembly locks on the valve body

6) Reset and actuate valve for the correct operation

To reduce torque settings

1) Release top cap approx 1/4 turn

2) Slacken locknut

3) Turn adjustment screw slightly anticlockwise

4) Re-tighten locknut

5) Re-tighten top cap until the complete assembly locks on the valve body

6) Reset and actuate valve for the correct operation

If the seal / torque does not improve with the adjustments check the condition of the 'O' ring seal by following the full dismantling procedure on the next page.