Damper Actuators

A Little About Damper Actuators

Damper actuators are powered devices that are used to operate a damper and adjust the flow of air and smoke. There are two basic types: electric and pneumatic. Electric damper actuators differ in terms of output. Choices include 0 to 12 VDC, 2 to 10 VDC, and 4-20 mA. Products with features such as low-power consumption, direct action, reverse action, and thermal protection are commonly available. Pneumatic damper actuators have a start point that is measured in pounds per square inch (psi). General damper actuators and specialized fire and smoke damper actuators are also available.

Selecting damper actuators requires an analysis of product specifications. Parameters include torque, supply voltage, and operating. Torque, the required range of output, is often measured in inch-pounds (in-lbs). For a single force, torque or moment of force is the cross-product of a vector from a reference point to the application point. For multiple forces, torque is the vector sum of the torque values for each of the forces. Supply voltage is the nominal voltage supplied to motor of the damper actuator.