
Instruction Manual
D103407X012
1052PSV Actuator
May 2011
8
Figure 6. Precise Valve/Actuator Closed Position Adjustment
WARNING
Be aware of pinching parts during installation, maintenance, and adjustments of valve/actuator components. To avoid
injury, keep hands and tools clear of actuator access windows when operating or adjusting the actuator.
Precise Valve/Actuator Closed Position and Turnbuckle Adjustment
Correct turnbuckle adjustment ensures that the valve is correctly closed when the actuator is against its travel stops.
Key numbers are shown in figure 13.
A regulated air supply with appropriate gauge will be required to stroke the actuator. The following wrench sizes will
be used to adjust the turnbuckle: 1-5/16 inch wrench for the turnbuckle (key 57), 15/16 inch wrench for the lower
locknut (key 16), and 1-5/16 inch wrench for the left-hand upper locknut (key 58).
Note
For the most accurate adjustment of the actuator, do not remove the cover (key 33) during this procedure.
1. Loosen the lower locknut (key 16).
2. Make sure the actuator box assembly (key 14) is clear of any tools or other instruments that could obstruct the
actuator stroke path. Pressure the diaphragm casing enough to stroke the actuator down so that the left‐hand
threaded upper locknut (key 58) is accessible through the access opening. Loosen the locknut.