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 (Shown in Image 8 to the right), increas-
ing 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.
STEP 7
Note: 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.
Image 8
IOM-A-ACV-910_610 2115
EDP# 1917028
© 2021 Watts 5
