Actuator Removal
4. Loosen lockscrew #1 about 6 to 8 turns. Loosen lockscrews #2 about 3 turns. See Figure 3.
5. Using a soft hammer, tap the heads of the #1 lockscrews to loosen the keys.
6. Remove the four screws holding the wrenching nut to the gear sector, then remove the stud,
locknut, spring washers and the wrenching nut with the keys attached.
7. Remove the 6 screws fastening the adaptor to the valve. On the 4", 5", 6" and 10" valves, these
screws also hold the bonnet to the valve body.
Lift the actuator and adaptor off the valve.
8.
Actuator Installation
The actuator installation procedure is dependent upon whether or not the actuator is built for
submerged service. Follow the correct section to properly install the actuator.
Submerged Service Actuators
1. Place the valve in the position it was in when the actuator was removed. Normally this will be so the
plug is in the lowest position in the valve body.
2. Place a new gasket on the valve bonnet, lining up the holes in the bonnet and gasket.
3. Line up the scribe marks on the valve and actuator made during actuator removal, then set the
actuator on the valve so the valve shaft slides into the actuator gear sector.
4. Fasten the actuator adaptor to the valve with six screws.
5. Slide the flat washer down the plug stud so it rests on top of the gear sector. If the valve is a size
24" thru 36", hold the keys in position when you slide the washer over the plug stud and guide the
keys into the gear sector and stem slots. Then install the four screws fastening the washer to the
gear sector.
6. Place the spring washers on the plug stud as shown in Figure 4.
7. Screw the lock nut down the plug stud until it is tight and the spring washers are completely
compressed, then back the nut off one full turn.
8. If the valve is a size 24" thru 36", tighten the #2 lockscrews and then the #1 lockscrews to hold the
keys in place. Skip this step if the valve is a size 4" thru 20".
9. Line up the scribe marks on the cover and housing, then set the cover on the actuator. Fasten the
cover in place.
Check the closed position stop setting and readjust if necessary.
10.
11. Pipeline flow may now be restored.
August 2012
Manual G-Series Actuators on PEC Eccentric Valves
(Continued)
Figure 4—Spring Washer Stackup
Page 9
DeZURIK
D10063
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