DeZurik G6-C4 Посібник - Сторінка 9

Переглянути онлайн або завантажити pdf Посібник для Контролер DeZurik G6-C4. DeZurik G6-C4 16 сторінок. Cylinder operated actuator

Removing Cylinder

This procedure can be performed with the actuator installed on the valve or removed.

1. Discontinue flow and relieve pipeline pressure.

2. Apply air pressure to the port in the cylinder cap (the end farthest from the actuator housing)

until the valve has moved to the end of its stroke.

Accidental operation of power actuator can cause personal injury or equipment damage.

Disconnect and lock out power to actuator before servicing.

3. Disconnect and lock out the pneumatic power to prevent accidental operation of the actuator.

4. Disconnect the tubing from both cylinder ports.

5. Remove the screws (B23), nuts (B24), lockwashers (B28) and stop cap (B29) from the housing

(B1).

6. Remove the cap nut (B25), jam nut (B22) and spring washers (B21) from the end of the rack rod

(B6).

7. Remove the screws (B27) fastening the cylinder assembly to the housing (B1), and carefully

remove the cylinder assembly by sliding it away from the actuator until the rack rod clears the

housing.

8. See Cylinder Instructions for details on rebuilding the cylinder.

1. Scrape the old gasket material (B26) from the actuator housing and cylinder head, then place a

new gasket on the cylinder head.

2. Install the cylinder/rack rod assembly by sliding the rack rod through the rack (B4) and fasten

the cylinder to the housing (B1) with screws (B27).

NOTE: If the rack rod is not attached to the cylinder assembly, clean the threads of both the rack rod and

the cylinder shaft, then apply Loctite to the cylinder shaft threads and screw the rack rod onto the cylinder

shaft.

3. Slide the spring washers (B21) onto the rack rod. See Table C for spring washer arrangement.

4. Screw the jam nut (B22) onto the rack rod (B6) until the spring washers are completely

compressed, then loosen the jam nut just until the spring washers return to normal shape.

5. Screw the cap nut (B25) onto the rack rod (B6) and tighten the two nuts against each other.

6. Scrape old gasket material (B26) from the housing (B1) and stop cap (B29).

7. Attach a new gasket (B26) and stop cap (B29) to the housing (B1) with screws (B23), nuts (B24)

and lockwashers (B28).

8. If the actuator is a powered actuator, reconnect power to the actuator.

9. Adjust the open and closed position stops described in the "Adjusting Position Stops" section.

August 2012

Cylinder Operated G-Series Actuator

Page 9

DeZURIK

D10455