Manual

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com
01/05
R
Classic Series
F114-3 (Globe)
F1114-3 (Angle)
f114-3 link
Specifications
The Rate-of-Flow Control Valve with Hydraulic Check Feature shall be a pilot operated diaphragm valve
designed to automatically limit flow rate to a constant, adjustable, maximum, and close drip-tight when
downstream pressure becomes greater than upstream pressure. The throttling action of the valve shall be
controlled by an externally mounted modulating control pilot, which senses differential pressure across a
remote mounted orifice plate (field installed).
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 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.
Pilot control systems for valves 3” and smaller shall contain a Flow Clean Strainer, Adjustable Closing
Speed, Adjustable Opening Speed Control, (2) Check Valves and a Rate-of-Flow Pilot. Pilot control systems
for valves 4” and larger shall contain an external Y-Strainer, Adjustable Closing Speed Control, Adjustable
Opening Speed Control, (2) Check Valves, a Rate-of-Flow Pilot and Isolation Ball Valves on all body
connections. The Orifice Plate shall be factory calibrated and installed in a machined counter-bore in the
inlet flange. All pilot control systems shall utilize copper tubing and brass fittings regardless of valve size.
The valve shall be Watts ACV Model F114-3 (Globe) or F1114-3 (Angle) Rate-of-Flow Control Valve with
Hydraulic Check Feature.
RATE-OF-FLOW VALVE with
HYDRAULIC CHECK FEATURE