Green zone control dampers are powered normally open or normally closed 24 vac with an 88-pound torque motor; there is no wasted energy by springs to overcome or to be held open. According to the ...

The Wireless Zone Control Dampers are available in a retrofit configuration with the full-tube style in the round version or with a frame style in the rectangular version. Dampers will need 24 V to be ...

Pneumatic furnace damper drives may be more common, but electro-hydraulic actuators provide several advantages to the more traditional control scheme. One fossil-fired plant in Taiwan achieved more ...