NLH100F - WD-2000 Ductile Iron Wafer Style Butterfly Valve - Lever Lock Handle - 3"Nibco NLH100F WD 2000 Ductile Iron Wafer Style Butterfly Valve Lever Lock Handle 3" The NIBCO wafer type butterfly valve provides bubble tight shutoff at 200 PSI. The wafer valve is ideal for commercial and some light industrial process applications including HVAC and vacuum services, in addition to hot and cold potable water. The NIBCO ductile iron butterfly valve provides ease of operation with quarter turn (90 degrees) open to close. The valve's