Actuator, Valve Application Damper and Valve, Signal Type On/Off, Rated Torque 177 in-lb, Input Voltage 24V AC/DC, Contact Form SPDT, Electrical Connection Type Hardwired, For Use With Building Automation Systems Building Automation System Compatible, NEMA Rating 2, IP Rating IP54, Spring Return Spring Return, Time to Close 57 sec, Shaft Type Self-Centering Clamping, Shaft Rotation CW/CCW, Stroke Degree 90 Degrees , Mounting Type Direct Mount, Maximum Operating Temperature 131 Degrees F