STEP 6
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 the pressure is slow
upon increased downstream demand, turn the adjustment screw
OUT, counterclockwise, increasing the rate of opening. If recov-
ery 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 7
(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.
Counterclockwise to INCREASE
the rate of opening
Clockwise to DECREASE
rate of opening
Figure 3
Flow Control
4 IOM-A-ACV-910-17_610-17 2115
EDP# 1917040
© 2021 Watts
IOM-A-ACV-910-17_610-17 2115
EDP# 1917040
© 2021 Watts 5
