... often take Large-scale Fair. Pneumatic soft seal midline butterfly valveModel : ZTD67(4)1X (F, F4, J ... 300LbConnecting: wafer ,flangeDimension standard: GB, ANSIBody material: Cast iron, Carbon steel(WCB), Stainless steel(CF8, CF8M)Seat ... )Control: Switch , Adjust .Selection of Accessories: solenoid valve, locator, limit switch, F.R..L. Combination unit ... -F25). pneumatic fluorine lined butterfly valve