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valves and accessories
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SERIES 7800
Check Valves
For use in Grooved-End Piping Systems
The Gruvlok Series 7800 Check Valve is a compact, cost
effective valve offering low pressure-drop, non-slam
performance. The Series 7800 Check Valve assembly is lighter
and faster to install, and costs less than fanged and wafer
valve assemblies.
In the full-open position the Series 7800 swing clapper is held
tightly against the valve body, out of the fow stream, to
provide maximum fow area and prevention of clapper futter.
The clapper design produces quick, non-slam closure before
fow reversal can occur, while meeting FM requirements for an
anti-water hammer valve rating.
Each valve is hydrostatically tested for leak tightness to 500
PSI. The clapper-seat design permits leak free sealing of back
pressures in service conditions ranging from 300 PSI (20.7 bar)
to as low as 1 PSI (0.07 bar) (28” water head).
PERFORMANCE:
Pressure Rating:
Commercial Applications - Sizes 2" thru 12" inclusive,
300 psi (20.7 bar) maximum working pressure.
MATERIAL SPECIFICATIONS
BODY: Ductile iron conforming to ASTM A 536, Grade 65-45-12
COATING: Rust inhibiting paint on exterior and interior - color, black
enamel Nickel Electroplated, Zn Electroplated (optional)
CLAPPER: 2”- 5” Type 304 or 302 stainless steel to ASTM A 167 6"-12"
Ductile iron conforming to ASTM A 536, Grade 65-45-12
CLAPPER FACING:
Grade E EPDM: -40° to 230°F (-40° to 110°C) Service Temperature Range
Recommended for water service, dilute acids, alkaline, oil-free air
and many chemical services.
NOT FOR USE IN PETROLEUM SERVICES.
Grade T Nitrile: -20° to 180°F (-29° to 80°C) Service Temperature Range
Recommended for petroleum products, air with oil vapors,
vegetable oils and mineral oils.
NOT FOR USE IN HOT WATER SERVICES.
SEAT RING: Type 304 stainless steel to ASTM A 123, ASTM A 213, ASTM
A 312 or ASTM A 269
SPRING: Type 302 stainless steel to ASTM A 313
HINGE PIN: Type 304 or 302 stainless steel to ASTM A 580
HINGE PIN BUSHINGS: Sintered bronze to ASTM B 438
HINGE PIN PLUGS & DRAIN PLUGS: Cast iron to ASTM A 126 Class A
Spring
Bushings (2)
Hinge Pin
Hinge Pin Plug (2) Drain
Connections
Clapper
Assembly
Seat Ring
Body
GL-2.10