Pneumatically Actuated Butterfly Valve Action Spring Return Body Material Ductile Iron Pipe Size 6 in Max Water Pressure 200 psi Seat Material EPDM Number of Bolt Holes 8 Lug Dia 3/4-10 in Standards API 609 Air Inlet Pressure 80 psi Bolt Circle Dia 9 1/2 in Product Type Pneumatically Actuated Butterfly Valve