NLG100F - LD-2000 Ductile Iron Lug Type Butterfly Valve - Lever Lock Handle - 3"Nibco NLG100F LD 2000 Ductile Iron Lug Type Butterfly Valve Lever Lock Handle 3" The NIBCO ductile iron lug butterfly valve provides ease of operation with quarter turn (90 degrees) 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 inches. The unique molded in EPDM seat liner with aluminum bronze