The Series 12 Handwheel Gear Operator Kit is designed for manual on/off and throttling service for quarter turn butterfly valves in sizes 2" and larger. The Series 12 is constructed with a heavy-duty epoxy powder coated cast iron housing, steel input shaft, ductile iron segment gear and grease fitting. It is completely self-lubricated and weatherproof. With the gear operator, the series 12 includes a valve positioner, heavy duty cast iron hand wheel and mechanical travel stops for field adjustment. Other available options are a chain wheel kit, padlock kit and a 2" square nut.