Watts F1110-18 - Manual

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com
01/05
R
Classic Series
F110-18 (Globe)
F1110-18 (Angle)
Specifications
The On-Off Float Control Valve with Pressure Sustaining Feature 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 when water level is below the adjustable low-level setpoint, allowing a calculated
“draw-down” of water level to increase tank circulation. The valve shall also throttle to sustain a minimum
upstream pressure during tank filling operations.
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 constructed 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
Ductile 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 throttling components (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 “Quad Seal” 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 Quad Seal shall contact the valve seat and seal drip-tight. The disc and diaphragm
assembly 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.
The pilot control system shall contain an On-Off Float Pilot, 3-Way Accelerator Pilot with integral orifice,
Pressure Sustaining Pilot, separate Adjustable Opening and Closing Speed Controls, (2) 12” Float Rods,
Float Ball, an external Y-Strainer and Isolation Ball Valves on all body connections. The pilot control system
shall utilize copper tubing and brass fittings. The adjustment range of the pressure sustaining pilot shall be
20-200 psi.
The valve shall be Watts ACV Model F110-18 (Globe) or F1110-18 (Angle) On-Off Float Control Valve with
Pressure Sustaining Feature.
ON-OFF FLOAT VALVE with
PRESSURE SUSTAINING FEATURE