Butterfly Valves, Lug Style, Body Material Ductile Iron, Max. Water Pressure 250 psi, Pipe Size 2 1/2 in, Liner Material Buna-N, Disc Material Ductile Iron, Handle Type Bare Stem, Number of Bolt Holes 4, Bolt Circle Dia. 5 1/2 in, Lug Dia. 5/8 In.-11, Standards API 598, API 609 Category A, ASME 16.1, ASME 16.34, ASME 16.5, MSS SP-67, ANSI, API, ASME