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The ST Series are resilient seated 125/150, ductile iron wafer style (STW) or lug style (STL) butterfly valves available with either BUNA-N or EPDM seats and a choice of disc materials (316SS, nickle plated ductile iron, or bronze). It can be equipped with a manual handle or with pneumatic or electric actuators. A full range of accessory items are available including limit switches, solenoid valves, positioners and manual override devices.