Butterfly Valves Lug Style Body Material Ductile Iron Max Water Pressure 250 psi Pipe Size 4 in Liner Material Buna-N Disc Material 316 Stainless Steel Number of Bolt Holes 8 Bolt Circle Dia 7 1/2 in Lug Dia 5/8 In.-11 Standards ANSI API ASME ANSI API ASME