The NIBCO® ductile iron butterfly valve provides ease of operation with quarter-turn (90 degrees) open to close. The Buna-N cartridge seat liner with ductile iron, electro nickel plated disc provides good abrasion resistance properties and compatibility with solvents, oil, water and hydraulic fluid. An extended neck allows for insulation up to 2 inches. Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Choose NIBCO®more ductile iron butterfly valves for the most specified, versatile and economical valve option in commercial, mechanical and industrial applications. NIBCO® butterfly valves are backed by the NIBCO 5-year 125% limited warranty. less