DeZurik LIFT Manuel - Page 6

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DeZURIK

LIFT, TURN AND RESEAT G-SERIES ACTUATORS USED ON

PTW & PFW TAPERED PLUG VALVES

Actuator Removal

10. Take out the screws fastening the actuator adaptor to the adaptor plate (3" and 4" valves) or to

the valve bonnet (5" thru 16" valves). Lift the complete actuator assembly from the valve.

Actuator Installation

1. Place the valve plug in the position noted in ACTUATOR REMOVAL.

2. Line up the scribe marks made during actuator removal, then slide the actuator onto the valve

so the hex in the plug stem engages in the actuator gear sector.

3. Fasten the actuator to the valve.

4. Slide the bearing washer onto the plug stud until it rests on the gear sector.

5. Screw the sleeve onto the plug stud until it contacts the bearing washer. This is a left hand

thread.

6. Slide the pointer over the sleeve and turn it to the position noted in ACTUATOR REMOVAL.

Fasten the pointer in place with the screws removed earlier.

7. Place a key in the sleeve keyseat, then slide the operator onto the sleeve.

8. Install and tighten the nut against the operator; secure in place by tightening the set screw in the

nut.

9. Check the stop settings and readjust if necessary. The correct adjustment procedure is

described in the STOP ADJUSTMENT Section of this Instruction.

10. Pipeline flow and pressure may now be restored.

May 2020

(continued)

Figure 1— Plug Stem Stampings

Page 6

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