STEP 4
Slowly open downstream isolation valve to establish flow through
the system.
Note: Reducing Control is set higher than the Sustaining Control
STEP 5
Open downstream isolation valve partially to establish flow
through the valve, observing downstream pressure change. If
downstream pressure is outside the desired pressure range,
turn the Reducing Control adjustment screw IN, clockwise, to
increase or OUT, counterclockwise, to decrease until pressure is
near the desired setting (See Figure 2).
STEP 6
Gradually open downstream isolation valve until fully open
.
STEP 7
Fine-tune the Reducing Control adjustment to the pressure
reducing set point, as detailed in Step 5.
Counterclockwise to INCREASE
the rate of opening
Clockwise to DECREASE the
rate of opening
Step 8
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 recovery of pressure is slow upon
increased downstream demand, turn the adjustment screw OUT,
counterclockwise, increasing the rate of opening. IF recovery
of downstream pressure is too quick, as indicated in a rapid
increase in pressure, possibly higher than the desired set-point,
turn the adjustment screw IN, clockwise, decreasing the rate of
opening (See Figure 3).
Step 9
(If the main valve comes equipped with a Closing Speed Control,
otherwise ignore this step.)
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 the downstream
pressure fluctuates slightly above the desired set point, turn the
adjustment screw OUT, counterclockwise, increasing the rate of
closing.
Figure 3
Flow Control
Counterclockwise to DECREASE
downstream pressure
Clockwise to INCREASE
downstream pressure
Figure 2
CP15 — Pressure Reducing Control
4 IOM-A-ACV-912_612 2115
EDP# 1917034
© 2021 Watts
IOM-A-ACV-912_612 2115
EDP# 11917034
© 2021 Watts 5
