Model BFA (31H) is a lug type butterfly valve. Its high strength through-stem design allows easy disassembly and reduced disc to stem failure. The superior quality and high pressure manual butterfly valves meet today's Heating, Ventilating & Air Conditioning (HVAC) requirements. It's rated for 250 psi bidirectional dead end service. Lug valves are drilled and tapped to meet ANSI Class 125/150 and PN16 flanges.