The mechanical devices used to open, close and modulate dampers are critical to precise control. The “motors” used to move the louvers and dampers can be electrically operated or pneumatic operated. Electrically operated damper drives have historically been favored, but the shift to retro-fit electric drives with pneumatic damper drives has been significant in the last two decades. When pneumatic vane actuators were first introduced for damper drive service, their virtues were quickly discovered. Their inherent design and operating advantages apply perfectly for precise damper control. These design and operating advantages are precise, smooth signal to movement response, 100 % duty cycle, continuous modulating service, no overheating, high speed/high-torque, fast full stroke open/close, and zero air consumption in resting state
Along with these performance features, pneumatic vane drives can replace electric damper drives in-place, with the same footprint and mounting dimensions, making retrofit fast and easy. Considering all above mentioned advantages, one can argue it makes sense to replace all electric drives with pneumatic vane actuator drives. In the movement toward better environmental control, and greater operating efficiencies, upgrading to pneumatic vane actuator damper drives for boiler damper control is an excellent choice.