The NIBCO® lug type butterfly valve provides bi-directional dead-end service without a downstream flange and Bubble tight shut-off at 250 psi. The valve performs well in isolation and throttling applications, commercial, some light industrial process and chemical applications that the liner compatibility will permit. The NIBCO® ductile iron butterfly valve provides ease of operation with quarter-turn (90 deg) open to close. With the internal stem/disc geometric 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 in. The unique molded-in EPDM seat liner with stainless steel disc is recommended for chemical applications the liner compatibility will permit. Please refer to NIBCO® technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Choose NIBCO® 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.