Siemens 599-01082 VALVE ACTUATOR, PNEUMATIC, 4-INCH, 5 TO 10 PSI, 3/4-INCH STROKE, 1/8-INCH NPTSiemens 599 01082 Valve Actuator, Pneumatic, 4 inch, 5 to 10 psi, 3 4 inch Stroke, 1 8 inch NPT This Flowrite 599 Series 4 inch Pneumatic Valve Actuator is designed for use with Flowrite 599 Series valves in liquid and steam service applications. This valve actuator has a 3 4 inch stroke, a nominal spring range of 5 to 10 psi, a max diaphragm pressure of 35 psi (241 kPa), and a 1 8 inch NPT air connection. Other features of this valve actuator include