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2. Rotary actuator - Wikipedia

   en.wikipedia.org/wiki/Rotary_actuator

   A rotary actuator is an actuator that produces a rotary motion or torque. The simplest actuator is purely mechanical, where linear motion in one direction gives rise to rotation. The most common actuators are electrically powered; others may be powered pneumatically or hydraulically , or use energy stored in springs .

3. Actuator - Wikipedia

   en.wikipedia.org/wiki/Actuator

   An actuator may be driven by heat through the expansion that most solid material exhibit when the temperature increases. This principle is commonly used, for example, to operate electric switches in thermostats. Typically, a (non-electronic) thermostat contains a strip with two layers of different metals, that will bend when heated.

4. Damper (flow) - Wikipedia

   en.wikipedia.org/wiki/Damper_(flow)

   This damper can switch the electrical power to control additional "slave" dampers, minimizing the electrical load on the damper's control circuitry and power transformer. A zone damper (also known as a Volume Control Damper or VCD) is a specific type of damper used to control the flow of air in an HVAC heating or cooling system. In order to ...

5. Air Movement and Control Association - Wikipedia

   en.wikipedia.org/wiki/Air_Movement_and_Control...

   ANSI/AMCA Standard 520 - Laboratory Methods for Testing Actuators establishes an industry standard for minimum rating and testing of actuators used on fire/smoke dampers. Requirements cover torque or force rating, long term holding, operational life, elevated temperature performance, periodic maintenance, production, and sound testing for both ...

6. Smoke damper - Wikipedia

   en.wikipedia.org/wiki/Smoke_damper

   Smoke dampers close by an electric or pneumatic actuator, or a spring actuator, and can be either manually reset or driven open on a reset signal to the electric or pneumatic actuator. Combination fire/smoke dampers are also available if a smoke barrier is desired at the same location as a fire barrier. Fire dampers and smoke dampers are an ...

7. Electric actuator - Wikipedia

   en.wikipedia.org/?title=Electric_actuator&...

   This page was last edited on 4 August 2010, at 22:28 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...