DeZurik G-SERIES Manuale di istruzioni - Pagina 6

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DeZURIK

G-Series Cylinder Actuator Used on BAW Butterfly Valves

Adjusting Position Stops

Adjusting Closed Position Stop

On 6A and 12A cylinder actuators, the Closed Position Stop is located in the end of the cylinder. See

Figure 2.

The actuator must be mounted before adjusting the position stop.

1. Loosen the Closed Position jam nut.

2. Adjust the Close Position screw to the proper position. Counterclockwise rotation of screw

increases the stroke, clockwise rotation of screw decreases the stroke.

3. Lock the Closed Position screw in place with the jam nut.

NOTE: Make sure the thread seal is positioned properly, and lock the setscrew in place with the jam nut.

Removing Actuator

1. Discontinue flow, relieve pipeline pressure and close valve.

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

Disconnect and lock out power to actuator before servicing.

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

3. Scribe corresponding lines on the valve and actuator to help align them during installation.

4. Remove screws (P4) and lockwashers (P10) and lift actuator assembly off adaptor (P1). See

Figure 4 for connecting parts identification.

Installing Actuator

1. Line up the scribe marks on the valve and actuator made

during actuator removal, then set the actuator on the

valve so that the valve shaft slides into the actuator gear

sector.

2. Fasten the actuator assembly to the adaptor plate (P1)

with lockwashers (P3) and screws (P2). See Figure 4 for

connecting parts identification.

3. Place the key into the key slot in the valve shaft and

gear.

4. Secure key by staking with a center-punch on the end of

the shaft. Stake on both sides of the shaft as shown in

Figure 3.

Note: Do not deform the outside diameter of the shaft.

D10480

(Continued)

Page 6

Figure 3 – Shaft Key Staking

August 2012