Siemens SKD82.50U FLOWRITE ELECTRO-HYDRAULIC ACTUATOR, FLOAT, NSR, 3/4" STROKESiemens SKD82. 50U Flowrite Electro Hydraulic Actuator, float, NSR, 3 4" Stroke The Flowrite SKD Valve Actuator is used with Flowrite and other standard valves with a 3 4 inch stroke. This electronic valve actuator requires a 24 Vac supply to provide floating control of the valve. Normally closed and 3 way upper port nominal force is 225 lb in (1000N); normally open and 3 way bypass port is 258 lb in (1150N). Other features of this valve actuator