DeZurik M3 매뉴얼 - 페이지 6

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DeZURIK

M-Series Manual Actuator

Position Stops

The position stops prevent the actuator from going beyond the open and closed positions of the valve.

The stops are preset and do not require further adjustment. If the actuator is disassembled, however,

the stops may require readjustment as described in ASSEMBLY and INSTALLATION.

This actuator retains the stem packing in the valve.

Removing the actuator while the valve is under pressure can cause personal injury and

equipment damage. Relieve pressure in the valve before removing the actuator.

1. Relieve the pressure and flow in the pipeline and close the valve.

2. Remove the cover screws and cover assembly from actuator.

3. Drive the pins out of the collar(s). The pins are roll pins and can be driven straight through

toward the bottom of the housing.

4. Remove the guide blocks and yoke guide.

5. Unscrew the shaft from the collars, the stop nuts and the yoke nut.

6. Remove the shaft from the actuator housing

7. Remove all of the shaft components from the housing.

8. Remove the yoke from the valve shaft. Keep the drive key with the yoke.

9. Remove the three actuator mounting screws, and remove the housing from the valve.

1. Clean all parts and remove old sealant from the actuator cover.

2. Restore the key and keyway in the valve shaft to original condition.

3. If the valve shaft bearing in the bottom of the housing is worn, replace it.

4. Install a new O-ring outside the valve shaft bearing.

5. Set actuator housing on valve. Make sure relief groove on bottom of actuator is open.

6. Insert the three screws that fasten actuator housing to the valve. Tighten the inside screw first.

7. If yoke nut bearings and retainers are worn, replace them.

8. Inspect the holes near the ends of the actuator shaft, and remove any burs made when the pins

were removed during disassembly.

9. Insert yoke nut assembly into yoke and install both on valve shaft.

10. Slide thrust washer onto actuator shaft.

D10287

Page 6

February 2017