1. Depressurize the actuator completely.
2. Based on the actuator size, choose the correct threaded rod kit from Table A-1.
3. Replace one by one each end cap screw for the threaded rod kit and turn down the
adjusting nut until it touches the end cap.
4. Once all for end cap screws have been replaced, gradually turn the adjustment nuts
on threaded rod in CCW direction by turning the nuts half turn at a time. Make sure
the rod itself does not turn. Continue this until the load of springs are relieved.
5. Repeat the same procedure for the end cap screws on the other size of the actua-
tor as shown in gure A-1.
6. In case of an actuator/valve assembly “stuck” in mid position: The actuator now
can be disassembled from Valve, by removing the mounting studs/bolts.
Table A-1. Threaded rod dimensions in mm
Actuator Size Thread
Threaded rod length
(mm) (inch)
12 M4 132 5.2
25 M5 140 5.5
40 M5 140 5.5
65 M5 140 5.5
100 M5 140 5.5
150 M6 145 5.7
200 M6 145 5.7
350 M8 185 7.3
600 M10 185 7.3
950 M12 498 19.6
1600 M12 498 19.6
2500 M12 498 19.6
4000 M14 600 23.6
Figure A-1 Spring load removal rod dimensions
Threaded Rod
Washer
Adjusting nut
Holding nuts
Length
Thread
54
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