Wester_m 14.03.2024


VAV flow controllers for exhaust systems with variable air flow with increased noise requirements

With built-in high-performance silencer
Rectangular body reduces air speed
Electronic controllers (Easy, Compact, Universal and LABCONTROL) for various applications
Allowable ​air speed​ up to​ 13 m/s
Damper tightness according to EN 1751, class 4
Housing tightness according to EN 1751, class A

Optional equipment

Soundproofing coating to reduce noise generated by the chassis
Additional silencer TS Series to reduce noise generated by air flow


VAV air flow controllers are equipped with an effective pressure sensor to measure air flow.

The control component (optional accessories) includes an effective pressure transducer, which converts the effective pressure into an electrical signal, a controller and an actuator; The control functions can be implemented using the Easy controller, Compact controller or individual components (Universal or LABCONTROL).

For most applications, the setpoint comes from the room temperature controller. The controller compares the actual value with the setpoint and modifies the drive control signal if there is a difference between the two values.

A built-in silencer reduces noise caused by restricted airflow. Due to the larger rectangular cross-section on the room side, the airflow speed is approximately half that of a circular duct.

Standard sizes 125 – 400 mm
Air flow range 14 – 2007 l/s or 50 – 7228 m³/h

Adjustable air flow range (dynamic differential pressure device) Approx. 10 – 100% of nominal flow

Minimum pressure drop Up to 258 Pa (without round silencer)

Maximum pressure drop 1000 Pa
Operating temperature 10 to 50 °C


① Built-in silencer
② Double seal
③ Shutter
④ Effective pressure sensor
⑤ Control component, e.g. Easy controller

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