DeZurik G Series Instructions

DeZURIK
G-Series Cylinder Actuator Used on BAW Butterfly Valves
D10480 Page 12 August 2012
Reassembling Actuator (Continued)
11. Apply a thin bead of silicone sealant Dow RTV-732 to the stop cap (B29) and attach it to the
housing (B1) with screws (B23), nuts (B24) and lockwashers (B28).
12. Apply a thin bead of silicone sealant Dow RTV-732 to the cover (B2). Line up the scribe marks
on the cover and housing (B1) and attach the cover with screws (B13).
13. Attach the pointer (B17) to the gear (G3) with screws (B18) pointing to the open position mark
on the cover (B2).
14. Adjust the open and closed position stops described in the “Adjusting Position Stops” section.
Changing Mounting Positions
The actuator can be mounted in 90° increments around the valve shaft.
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. Remove the actuator from the valve. See “Removing Actuator” section.
3. Rotate the actuator to the desired position.
4. Install the actuator on the valve. See “Installing Actuator” section.
Troubleshooting
Condition Possible Cause Corrective Action
Actuator closes to wrong
position
Closed position stop is set
incorrectly
Adjust closed position stop. See
Adjusting Position Stops section
Actuator opens to wrong
position
Open position stop is set
incorrectly
Adjust open position stop. See
Adjusting Position Stops section
Actuator will not fully operate
valve
Cylinder pressure is low Increase cylinder pressure. Do
not exceed 100 psi (69 kPa).
Piston seal in cylinder is leaking Replace piston seal(s). See
Cylinder instructions.
Pipeline obstruction in valve is
preventing closure
Remove obstruction
Actuator rotates wrong
direction
Air connections to cylinder are
incorrect
Reverse air connections to
cylinder

DeZurik G Series Specifications

General

Brand	DeZurik
Model	G Series
Category	Controller
Language	English