Watts M1116-31 User Manual

R

PRESSURE SUSTAINING VALVE
with SOLENOID (On-Off) FEATURE

01/05

M116-31 or M6116-31 (Globe)

Mustang Series

Operation

The Watts ACV Pressure Sustaining and Solenoid (On-Off) Control Valve is designed to permit flow when
upstream pressure is above the adjustable setpoint of the control pilot, and throttle toward closed when
upstream pressure falls below the adjustable setpoint. It is controlled by a normally closed control pilot
designed to: 1) Open (allowing fluid out of the main valve cover chamber) when upstream pressure is above
the adjustable setpoint, and, 2) Close (allowing fluid to fill the main valve cover chamber) when upstream
pressure is below the adjustable setpoint. An increase in upstream pressure causes the valve to modulate
toward an open position. A decrease in upstream pressure causes the valve to modulate toward a closed
position.

The Solenoid Pilot will either open to allow regulating action, or close the valve drip-tight when energized.

Specify energize to open or close the Main Valve and voltage PRIOR to ordering.

When the valve is located “in line” connecting two distribution zones, the valve acts as a Pressure
Sustaining Control Valve. When pressure in the upstream zone falls below the pilot setting, the valve

modulates toward a closed position, sustaining pressure in the upstream zone. The valve will close, if
necessary, until upstream pressure is above the pilot setting. The valve should be specified to include the
optional opening speed control and position indicator when used for Pressure Sustaining applications.

M1116-31 or M61116-31 (Angle)

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 higher 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.

• Connect Solenoid to proper electrical source in compliance with local electrical codes.

Other Watts ACV Pressure Relief / Backpressure or Sustaining Control Valves

M116 / M6116 Pressure Relief / Backpressure or Sustaining Valve
M116-5 / M6116-5 Backpressure / Sustaining Valve with Hydraulic Check Feature
M116-32 / M6116-32 Pressure Sustaining Valve with Solenoid (On-Off) and Check Features
M116-52 / M6116-52 Surge Anticipator and Pressure Relief Valve

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com