NIBCO, NLK662K, GD-4865-8N 6" Grooved Underwriters Laboratories Factory Mutual Butterfly Valve, with Switch The NIBCOR 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. 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. An extended neck allows for insulation up to 2 inches. Choose NIBCOR ductile iron butterfly valves for the most specified, versatile and economical valve option in commercial, mechanical and fire protection systems. Features: Valve pressure rating 300 psi wwp EPDM encapsulated ductile iron disc Stainless steel stem with metal bushings Operating mechanism: Manual gear operator UL/ULC Listed FM Approved UL Listed for Indoor and Outdoor Service MSS SP-25 (markings) Approved by New York City MEA 9-97-E, Vol.2 when assembled with appropriate NYC indicator flag California State Fire Marshal Listing No. 770- 1243:101