Watts M1110-14 - Manual (Page 6)

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12541 Gulf Freeway • Houston, Texas 77034 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
Specifications
M110-14 (Globe)
M1110-14 (Angle)
The On-Off Float Control Valve shall be a pilot operated diaphragm valve designed to open fully or close drip-tight
as commanded by the Float Control Pilot. The Float Pilot may be either valve or remote mounted. The valve shall
close drip tight when water level reaches the adjustable high-level setpoint, and open fully when water level is be-
low the adjustable low-level setpoint, allowing a calculated “draw-down” of water level to increase tank circulation.
The main valve shall be a hydraulically operated, single diaphragm actuated, globe or angle pattern valve. Y-
pattern valves shall not be permitted. The valve shall contain a disc and diaphragm assembly that forms a sealed
chamber below the valve cover, separating operating pressure from line pressure. The diaphragm shall be con-
structed of nylon reinforced Buna-N, and shall not seal directly against the valve seat and shall be fully supported
by the valve body and cover. Rolling diaphragm construction will not be allowed and there shall be no pistons
operating the main valve or any pilot controls.
The main valve body and cover shall be Ductile Iron ASTM A536, and all internal cast components shall be Duc-
tile Iron or CF8M (316) Stainless Steel. All Ductile Iron components, including the body and cover, shall be lined
and coated with an NSF 61 Certified Epoxy Coating applied by the electrostatic heat fusion process. All main
valve trim and throttling components (cover bearing, valve seat and disc guide) shall be Stainless Steel. The
valve body and cover must be machined with a 360-degree locating lip to assure proper alignment.
The disc and diaphragm assembly shall contain a Buna-N synthetic rubber disc with a rectangular cross-section
that is securely retained on 3-1/2 sides by a disc retainer and disc guide. Diaphragm assemblies utilizing bolts or
cap screws for component retention will not be permitted.
The exposed portion of the seat disc shall contact the valve seat and seal drip-tight. The disc and diaphragm as-
sembly must be guided by two separate bearings, one installed in the valve cover and one concentrically located
within the valve seat, to avoid deflection and assure positive disc‑to‑seat contact. Center guided valves will not
be permitted. All necessary repairs shall be made from the top of the valve while the body remains in line.
Pilot control systems for valves 3” and smaller shall contain a Flow Clean Strainer, On-Off Float Pilot, (2) 12” Float
Rods and a Float Ball. Pilot control systems for 4” valves shall contain an On-Off Float Pilot, (2) 12” Float Rods,
Float Ball, an external Y-Strainer and Isolation Ball Valves on all body connections. All pilot control systems shall
utilize copper tubing and brass fittings regardless of valve size.
The valve shall be Watts ACV Model M110-14 (Globe) or M1110-14 (Angle) On-Off Float Control Valve.
Other Watts ACV Float Control Valves
M110-14 / M1110-14 On-Off Float Control Valve (6” and Larger)
910 Ops & Inst