Damper actuator
The damper actuator is in ventilation systems used to dampers to control. Nowadays, demand and energy supply are usually electrical, pneumatically controlled damper drives only play a niche role in building ventilation.
Damper actuators differ:
- In the manner of electrical control
- continuous control (control signal 0 ... 10 V or similar)
- Two-point control (open - close)
- Two-point actuators with spring return
- Three-point control (open - hold - close)
- in the manner of the flap actuation
- Rotary drive (mostly 90 ° range)
- Linear drive (less common in ventilation technology today)
For safety purposes, a direction of movement can be carried out via a spring drive, for example in order to safely close flaps in the event of a power failure. Alternatively, there are flap drives with an integrated electrical energy storage device ( supercap ), which has stored enough energy to safely close the flap.
The function is similar to that of valve actuators ; the volume flow is set by suitable positioning of one or more flaps.
Many of today's damper drives provide feedback on the end position of the damper via switching contacts.
Damper actuators are mostly designed with protection class IP54. For extreme environmental conditions (animal stalls), the drives were installed in special protective housings; today these actuators are usually supplied with a housing with a higher degree of protection.