STEP 7
Opening Speed Flow Control Adjustment: The Opening speed
flow control allows free flow into the cover and restricted flow out
of the cover of the main valve.
If valve opening is too slow, turn the adjustment screw OUT,
counterclockwise, increasing the rate of opening (See Figure 3B).
If valve opening is too quick, turn the adjustment screw IN, clock-
wise, decreasing the rate of opening (See Figure 3A).
Setting the Rate-of-Flow Pilot
STEP 5
With a demand for flow on the system, the valve can now be
adjusted for the proper flow rate. This requires a meter to read
the flow that the valve is providing.
STEP 6
While reading the meter register, adjust the Rate of Flow Control:
Turn the adjustment screw IN, clockwise, to increase the flow rate
regulated (See Figure 2A).
Turn the adjustment screw OUT, counterclockwise, to reduce or
lower the flow rate regulated (See Figure 2B).
STEP 8
Closing Speed Needle Valve Adjustment: The closing speed
needle valve regulates fluid pressure into the main valve cover
chamber, controlling the valve closing speed.
If valve closing is too slow, turn the adjustment screw OUT, coun-
terclockwise, increasing the rate of closing.
Counterclockwise to REDUCE
Flow Rate Limit
Clockwise to INCREASE
Flow Rate Limit
2A
2B
Figure 2
CP14-1 Rate-of-Flow Control Pilot
Counterclockwise to INCREASE
the rate of opening
Clockwise to DECREASE
rate of opening
3A
3B
Figure 3
Flow Control
4 IOM-A-ACV-950_650 2115
EDP# 1917070
© 2021 Watts
IOM-A-ACV-950_650 2115
EDP# 1917070
© 2021 Watts 5
