Tuning The Pressure Balance Of Control Relay - GE FVP110 Maintenance Manual

Tuning the Pressure Balance of

Tuning the Pressure Balance of Control Relay

For a double-acting cylinder actuator, adjust the pressure balance of the control relay, if
necessary.
The optimal point of pressure balance differs slightly depending on the packing and
load characteristics of the cylinders, but in general, approximately 50 to 90% of the
supply air pressure is appropriate.
The pressure balance of the FVP110 is set to approx. 75% at the time of shipment.
To reduce the hunting phenomenon and air consumption adjust the balance pressure.
However, if the pneumatic piping is connected to the valve actuator, the pressure of a
cylinder on one side becomes higher, and the balance cannot be maintained.
To increase the balance pressure:
❑
Turn the screw for adjusting the balance pressure (Figure 44) counterclockwise.
To decrease the balance pressure, turn the screw clockwise. Do not loosen the
screw beside the adjustment screw.
Figure 44 Tuning the Pressure Balance of Control Relay
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Maintenance