Watts F1113-6RFP - Manual (Page 12)

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12541 Gulf Freeway • Houston, Texas 77034 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
The Flood Protection Shutdown Valve shall be a normally open Diaphragm Valve installed upstream of the
Reduced Pressure Zone Backflow Assembly, and automatically close if the RPZ relief valve begins to discharge.
A Time Delay supplied in the JB113 Junction Box shall prevent the valve from closing on intermittent discharges
from the RPZ relief valve. If continuous Relief Valve discharge occurs, the FS99 Flow Sensor installed horizontally
in the RPZ Relief Valve discharge piping shall send a signal to the JB113 Junction Box energizing Solenoid to
close the main valve. Once closed the Flood Protection Shutdown Valve must be manually reset.
The JB113 Junction Box shall be valve mounted with the Solenoid pre-wired. The FS99 Flow Sensor shall
be provided with the valve package and shall be field installed in a horizontal position in the RPZ Relief Valve
discharge piping. Vertical installation of the Flow Sensor shall not be acceptable. The valve shall be equipped
with a Limit Switch to provide local visual and remote electrical indication of valve closure.
The Reduced Pressure Zone Backflow Assembly, Flood Protection Shutdown Valve, JB113 Junction Box and
FS99 Flow Sensor shall be provided by the same manufacturer and be covered by a single warranty policy.
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. Direction of flow through the valve shall be the over-the-disc design, causing the
valve to close upon diaphragm failure.
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. The main valve stem shall be Xylan coated to avoid the effects of mineral or hard water
build-up. The main valve spring shall be the manufacturer’s heavy or extra heavy spring design. All necessary
repairs shall be made from the top of the valve while the body remains in line.
The Pilot Control System shall contain a Flo-Clean Strainer, 3-Way Accelerator, NEMA 4, 120 VAC 60HZ 3-Way
Solenoid with Manual Operator, Manual Reset Ball Valve, Pressure Gauge, separate Adjustable Opening and
Closing Speed Controls, Single Limit Switch, JB113 Junction Box and Isolation Ball Valves on all body connections.
The JB113 Junction Box shall be valve mounted and the FS99 Flow Sensor shall be field installed.
The valve shall be Watts Model 113-6RFP (globe) or 1113-6RFP (angle) Flood Protection Shutdown Valve.
Specifications
F113-6RFP (Globe)
F1113-6RFP (Angle)
910 Ops & Inst