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Valve Function Options
•
Electrically positioned by actuating one opening and/or one
closing 2-way solenoids
•
Valve actuation options are:
– Valve remains closed when NO inlet and NC outlet
solenoids are de-energized
– Valve fully opens when NC inlet and NO outlet solenoids
are de-energized
– Valve holds in last position when NC inlet and NC outlet
solenoids are de-energized
•
Valve position can be modulated by pulsing either solenoid
•
Solenoid override by-pass ball valves provided for manual
operation
STEP 6
Energize/De-Energize each solenoid to open main valve.
STEP 7
Opening Speed Flow Control Adjustment: The Opening speed
needle valve restricts flow out of the cover of the main valve.
If the main valve is opening too slowly turn the adjustment screw
OUT, counterclockwise, increasing the rate of opening (See Figure
2B).
If the main valve is opening too quickly, turn the adjustment screw
IN, clockwise, decreasing the rate of opening (See Figure 2A).
STEP 8
Energize/De-Energize each solenoid to hold main valve position.
STEP 9
Energize/De-Energize each solenoid to close main valve.
STEP 10
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 main valve is opening too quickly, turn the adjustment screw
OUT, counterclockwise, increasing the rate of closing.
4
IOM-A-ACV-933_633 2115
Clockwise to DECREASE
rate of opening
2A
EDP# 1917088
Counterclockwise to INCREASE
the rate of opening
2B
Figure 2
Flow Control
© 2021 Watts
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