Babbit Steam Specialty is the leading manufacturer of manually operated overhead valve actuators (chainwheels) worldwide. Babbit chainwheels with chain guidelines operate valves in high, normally out of reach locations, easily and econmically. The Babbit chainwheel attaches to the hand wheel of a valve allowing it to be opened and closed from the floor. Babbit chainwheels fit valve hand wheels ranging from 2 to 36 inches in diameter.