Watts S1115-4 User Manual

R

PRESSURE REDUCING VALVE with
SOLENOID (On-Off) FEATURE

01/05

Stainless Series

S1115-4 or S61115-4 (Angle)

Operation

S115-4 or S6115-4 (Globe)

The Watts ACV Combination Pressure Reducing and Solenoid On-Off Control Valve is designed to
automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure
regardless of varying flow rates, and open, allowing regulating action, or close drip-tight as commanded by
the Solenoid Pilot. It 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.

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.

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.

• If installation is subjected to very low flow or potentially static conditions, it is recommended a pressure

relief valve (1/2”minimum) be installed downstream of the Pressure Reducing Valve for additional system
protection.

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

Other Watts ACV Pressure Reducing Control Valves

S115 / S6115 Pressure Reducing Valve
S115-2 / S6115-2 Pressure Reducing and Sustaining Valve
S115-3 / S6115-3 Pressure Reducing Valve with Hydraulic Check Feature
S115-7 / S6115-7 Pressure Reducing Valve with Surge Control Feature
S115-11 / S6115-11 Pressure Reducing and Sustaining Valve with Hydraulic Check Feature
S115-43 / S1115-43 Pressure Reducing and Sustaining Valve with Surge Control Feature
S115-58 / S6115-58 Pressure Reducing Valve with Return Flow Feature
S115-74 / S6115-74 Pressure Reducing Valve with Low Flow By-Pass

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