Manual

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com
01/05
R
Classic Series
Operation
The Watts ACV Rate-of-Flow Control Valve with Pressure Reducing Feature is designed to automatically
limit flow rate to a constant, adjustable, maximum, and reduce a fluctuating higher upstream pressure to a
constant lower downstream pressure. In most applications, the Pressure Reducing function will be secondary
to the primary Flow Control Function.
The flow control action of the valve is controlled by a normally open, differential control pilot designed to: 1)
Open (allowing fluid out of the main valve cover chamber) when the differential pressure across the orifice
plate is below it’s adjustable set point, and, 2) Close (allowing fluid to fill the main valve cover chamber) when
the differential pressure across the orifice plate is above it’s adjustable set point. A decrease in differential
pressure causes the valve to modulate towards an open position, increasing flow rate. An increase in
differential pressure causes the valve to modulate towards a closed position, decreasing flow rate.
The pressure reducing action of the valve is controlled by a normally open, pressure reducing pilot designed
to: 1) Open (allowing fluid out of the main valve cover chamber) when downstream pressure is below the
adjustable setpoint, and 2) Close (allowing fluid to fill the main valve cover chamber) when downstream
pressure is above the adjustable setpoint. A decrease in downstream pressure causes the valve to modulate
toward an open position, raising downstream pressure. An increase in downstream pressure causes the
valve to modulate toward a closed position, lowering downstream pressure.
NOTE: Please specify desired flow rate prior to ordering.
Installation Guidelines
• Prior to installation, flush line to remove debris.
• Install valve horizontally “in line” (cover facing UP), so flow arrow matches flow through the line. Avoid
installing valves 6” or large vertically. Consult factory prior to ordering if installation is other than
described.
• Install inlet and outlet isolation valves. NOTE: When using butterfly valves, insure disc does not contact
control valve. Damage or improper valve seating may occur.
• Provide adequate clearance for valve servicing and maintenance.
• Install pressure gauges to monitor valve inlet and outlet pressure.
Other Watts ACV Rate-of-Flow Control Valves
F114 / F1114 Rate-of-Flow Control Valve
F114-1 / F1114-1 Rate-of-Flow Control Valve with Solenoid (On-Off) Feature
F114-3 / F1114-3 Rate-of-Flow Control Valve with Hydraulic Check Feature
F114-8 / F1114-8 Rate-of-Flow Control Valve with Pressure Sustaining Feature
F114-2 (Globe)
F1114-2 (Angle)
f114-2 link
RATE-OF-FLOW VALVE with
PRESSURE REDUCING FEATURE