Siemens 599-03609 RACK & PINION VALVE ACTUATOR, SPRING RETURN, 24VAC, 0-10 V PROPORTIONAL CONTROLSiemens 599 03609 Rack Pinion Valve Actuator, Spring Return, 24Vac, 0 10 V Proportional Control This Flowrite Rack and Pinion Valve Actuator is used with 1 2 to 2 inch Flowrite 2 way and 3 way valves with a 3 4 inch stroke. This electronic rack and pinion actuator has an operating voltage of 24 Vac, 0 to 10 Vdc proportional control, and bi directional fail safe spring return. Other features of this rack and pinion include all metal housing, and