RS-2 Rising Stem Valve Operator Electric 220V RS-2 Rising Stem 220V 60Hz electric powered valve operator. Complete with LCD revolution counter, torque arm extension bar, manual and steel storage case. Operates standard 1in (25.4mm) non rising valves with optional drive adapter hub 09-402-00. Operates valves from 6 to 60in (15.2 to 152.4 cm), open 4in hub design accomodates most rising stems, maximum torque of 700 ft/lbs (949 Nm). Forward and reverse operation with finger tip control.