Watts S1110-10 User Manual

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MODULATING FLOAT VALVE

01/05

Stainless Series

S1110-10 or S61110-10 (Angle)

Operation

S110-10 or S6110-10 (Globe)

The Watts ACV Modulating Float Control Valve is designed to automatically maintain a constant liquid level
in a tank or reservoir. It is controlled by a remote mounted Modulating Float Pilot designed to: 1) Modulate
Open (allowing fluid out of the main valve cover chamber) when reservoir level decreases, and, 2) Modulate
Closed (allowing fluid to fill the main valve cover chamber) when reservoir level increases. A decrease in
reservoir level causes the valve to modulate towards an open position, allowing reservoir level to increase.
An increase in reservoir level causes the valve to modulate towards a closed position, allowing reservoir
level to decrease.

If desired, the modulating action of the valve can be “reversed” by inverting or “reversing” the action of
the Modulating Float Pilot. The Modulating Float Control is remotely mounted from the valve, and field
connected with 3/8” minimum copper tubing in accordance with factory piping schematic.

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” and larger 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 gauge to monitor valve inlet pressure.

• Connect Modulating Float Control to main valve using 3/8” diameter minimum copper tubing (field

installed) in accordance with factory piping schematic.

• Modulating Float Control should be mounted in a field installed “stilling well” for protection against surface
turbulence and interference.

Other Watts ACV Float Control Valves

S110-13 / S6110-13 Modulating Float Control Valve with Pressure Sustaining Feature
S110-AS / S6110-AS Modulating Float Control Valve with Solenoid (On-Off) Feature
S110-14 / S6110-14 On-Off Float Valve
S110-18 / S6110-18 On-Off Float Valve with Pressure Sustaining Feature

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