The NIBCO® ductile iron butterfly valve is designed specifically to meet the rigorous requirements of automatic sprinkler systems. The EPDM encapsulated ductile iron disc provides bubble-tight shutoff at rated pressure. These valves are installed and monitored in fire protection applications where they remain in the normally closed position. A typical application would be fire pump test bypass lines. With the internal splined stem/disc drive design there is no need for pins or bolts that may create leak paths or turbulence in the waterway.
The NIBCO® grooved type butterfly valve is classified as a fire protection control valve that is Underwriters Laboratories listed and Factory Mutual approved for bubble-tight shutoff at 300 psi water working pressure. Grooved ends are compatible with IPS pipe.
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