Page 86 - publication

valves and accessories
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FTV-S (Straight) & FTV-A (Angle Body)
Tri-Service Valve
SERVICE RECOMMENDATIONS:
The Model FTV-S & FTV-A Tri-Service Valve is primarily
designed for installation in pump discharge piping where it
functions as a spring loaded silent check valve, fow control
valve and shut off valve.
OPERATION:
The Model FTV Tri-Service Valve operates automatically and
silently. Line pressure of approximately 1/4 PSI will open the
disc. The spring closes the disc as the line fow approaches
zero in order to prevent fow reversal & water hammer. The
fow through the valve can be adjusted from bubble tight shut
off to full fow by the threaded rising stem.
FEATURES:
The unique convertible body design permits the valve to be
changed on site from the straight to the angle confguration.
Flow measurement (where an approximate indication is
acceptable) is obtained by fow measuring ports on each side
of the valve seat. Pressure differential is easily recorded using
differential pressure measurement devices. If precision
accuracy is required, we recommend that a Gruvlok®Circuit
Balancing Valve be installed downstream from the FTV valve.
FEATURES & BENEFITS
• Three functions, one valve —
1. Spring-closure design,
2. Non-slam check valve,
3. Flow throttling valve
• Reduced feld installation and material cost
• Stainless steel spring
• High-strength resin seat EPDM for 8" and larger
• Anti-rotation lugs on the inlet and outlet. These lugs, combined
with the Gruvlok®fange adapter provides for a ridged rotation
free installation
• Flow measurement and pump throttling capabilities
• Temperature measurement capability
• Spring-closure design check valve prevents gravity or reverse
circulation when pump is not operating
• Bonnet “O” Ring can be replaced under full system pressure by
back seating of valve stem
• Suitable for maximum working pressure to 375 psi (26 bar) and
temperatures to 230°F. (110°C).
• Valve seat can be changed in the feld without use of special tools
• Low pressure drop due to “Y” pattern valve design
• Valve Cv designed to ASHRAE fow recommendations for quiet
system operation
• Drip-tight shut off valve smoke development rating of 50 or less
See pages 169-172 for installation instructions.
GL-2.10