Controlled Products Systems Group HRG 220-A ST - Manual (Page 35)

Installation and Maintenance Manual
21
Adjustment of the Flow Control Regulating Valve
HRG Swing gate operators employ the use of a flow control
valve to control the closing speed of the gate. The flow
control valve is the small rectangular brass device with the
knurled adjusting knob, located just above the red quick-
disconnect fitting for the hydraulic hose.
To adjust the close flow control valve correctly, pre-set the
valve set such that only two of the color bands (red & blue)
below the adjusting knob are exposed. Run the gate in the
close direction and turn the flow control valve clockwise until
you have achieved a good control of the gate in the closed
direction. The most crucial part of the closing of the swing
gate is when the lock pin strikes its receptacle. The flow control valve adjustment is most helpful for
maintaining control at this point of operation. (Other important adjustments are necessary for correct
locking. See separate instructions on "Adjustment of Indexing Arm")
CAUTION: Over-tightening of the flow control valve will cause the operator to draw more motor
horsepower than necessary or desirable, and cause additional stress on the hydraulic power unit.
Be sure to tighten the set screw on the adjusting knob to lock your adjustment.