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Grinnell Grulok Check Valves

Grinnell
Gruvlok Check Valves

for use in Grooved End Piping Systems

In the full-open position the Series 7800 swing clapper is held tightly against the valve body, out of the flow stream, to provide maximum flow area and prevention of clapper flutter. The clapper design produces quick, non-slam closure before flow rever sal can occur, while meeting FM requirements fo, an anti-water hammer valve rating.

Each valve is hydrostatically tested for leak tight ness to 500 PSI. The clapper-seat design permits leak-free sealing of back pressures in service con ditions ranging from 300 PSI to as low as 1 PSI (28' water head.