Siemens SKC62UA FLOWRITE ELECTRO-HYDRAULIC ACTUATOR, 24VAC, PROPORTIONAL, SR, 1-1/2" STROKESiemens SKC62UA Flowrite Electro Hydraulic Actuator, 24Vac, Proportional, SR, 1 1 2" Stroke The Flowrite SKC Advanced Feature Valve Actuator is used with Flowrite and other standard valves with a 1 1 2 inch stroke. This electronic valve actuator requires a 24 Vac supply to provide a 0 to 10 Vdc or 4 to 20 mA proportional control signal to the valve. Other features of this valve actuator include automatic stroke calibration, manual override, die cast