Flowserve WRG Series Standard Actuator - Manual (Page 10)

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User Instructions WRG Series Standard Actuator - WCENIM0123-00 12/12
DA Hydraulic Override Pressure for Rated Body torque
Model WRG3 WRG4 WRG5 WRG6 WRG7 WRG8
MOP, psi 1860 2100 2050 1950 1950 2150
Max. System Pr 2500 psi
Fig.: 3 Install Hydraulic Override (DA)
4.4.2 Remove end cap of the hydraulic cylinder. With a suit-
able socket/tube spanner located on the hex head of the
hydraulic piston end, thread in and tighten the piston rod
into the threading of the Torque Module’s Guide Block.
Torque to values, as for pull rod/ piston rod.
4.4.3 Put back the end cap, taking care not to damage the
cap seal, and tighten fully the tie rod nuts of the hy-
draulic cylinder.
4.4.4 Connect the ports of the hydraulic cylinder to the di-
rection control valve on the hydraulic power pack. Re-
fer schematic.
4.4.5 Check and ensure the Hydraulic pressure setting of
the pump does not exceed the MOP setting, refer table
below. Use the plugged port on the pressure line Tee,
to connect a suitable pressure gage.
4.5 Operation –DA Override
4.5.1 For Manual Override operation, turn the 3 way valves
on the pressure module to vent cylinder ports to at-
mosphere and Close the the hydraulic bypass valve,
HBV (if provided externally). Close the pressure re-
lease valve on the pump. Turn the lever on the 4 way
direction control valve on the power pack, to select
the direction of the actuator rotation and stroke the
hydraulic pump.
4.5.2 To restore Automatic operation, turn HBV to Open
position, turn the vent valves to connect the cylinder
ports to air supply pressure and open the pressure
release valve on the hand pump.
CAUTION! Over thrust by the hydraulic override may
cause actuator damage. Prevent damage and un-
safe working, by adjusting the overload valve on the
pump to limit the hydraulic pressure, as shown in
the table.