Actuator, Valve Application Damper and Valve, Signal Type Proportional, Rated Torque 545 lb-in, Input Voltage 22 to 30V DC, 24V AC, Output Signal 2 to 10V DC, Electrical Connection Type Hardwired, NEMA Rating 4, IP Rating IP56, Spring Return Spring Return, Shaft Type 3/8 to 1/2 In. Round, Shaft Rotation CW/CCW, Mounting Type Direct Mount, Maximum Operating Temperature 140 Degrees F, Minimum Operating Temperature -25 Degrees F, Overall Width 4 in, For Shaft Diameter 1/2 in