Setting the Main Valve Pressure Reducing Control
Note: Pressure Reducing Control is set at a lower PSI than the
Low Flow By-Pass Control.
STEP 1
Gradually open downstream isolation valve to establish flow
through the system.
STEP 2
Adjust the Pressure Reducing Control to the desired pressure set
point by turning the adjustment screw IN, clockwise, to increase
or OUT, counterclockwise to decrease downstream pressure.
Allow the system to stabilize (See Figure 2).
STEP 3
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 4
If equipped with closing speed;
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.
Turn Counterclockwise to
increase the rate of opening
Turn Clockwise to decrease
rate of opening
Figure 3
Flow Control
Counterclockwise to DECREASE
downstream pressure
Clockwise to INCREASE-
downstream pressure
Figure 2
CP15 — Pressure Reducing Control
4 IOM-ACV-115-74_6115-74 2115
EDP# 1917043
© 2021 Watts
IOM-ACV-115-74_6115-74 2115
EDP# 1917043
© 2021 Watts 5
