DeZurik M3 Manuale - Pagina 9

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Convert from CCW to CW to Open (Open Right)

This actuator retains the stem packing in the valve.

Removing or servicing the actuator while the valve is under pressure can cause personal

injury and equipment damage. Relieve pressure in the valve before servicing the actuator.

1. Relieve the pressure and flow in the pipeline.

2. Close the valve CW.

3. Remove screws (B16) and washers (B17) and remove the cover assembly (B4) from the housing

(B1).

3. Remove the key from the valve shaft and yoke (B3).

Note: Drill and tap the end of the key for a 1/8" screw. Insert the screw into the tapped hole

and pull the key out from the valve shaft and yoke.

If the key can be grasped easily, it may come out by moving the input shaft (B6) back and forth

slightly.

4. Rotate the nut/handwheel of the actuator CCW until the yoke (B3) moves 90 degrees from the

closed position.

5. Adjust the nut/handwheel slightly until the keyways in the valve shaft and yoke (B3) line up. Drive

the key between the valve shaft and yoke until it is flush with the top of the valve shaft.

Note: Do not "mushroom" the end of the key.

6. Center punch end of valve shaft on each side of key to retain key in keyway.

7. If open or close position is not satisfactory, follow steps 1 through 4 in the "Setting Position Stops"

section on page 7.

8. Clean the mating surfaces on the actuator housing (B1) and cover assembly (B4).

9. Using RTV or another silicone-based sealant, form a gasket on the mating surface of the housing

(B1).

10. Adjust the pointer (B30) to the opposite "CLOSED" marking on the cover assembly (B4).

11. Assemble the cover assembly (B4) to the housing (B1) with screws (B16) and washers (B17) lining

up the pointer driver (B29) with the slot in the yoke (B3).

12. The valve will now open turning the nut or hand-wheel CW.

February 2017

M-Series Manual Actuator

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Page 9

DeZURIK

D10287