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Blauberg AVK 40x20

Air damper for rectangular duct.
EAN codeEAN4058448063367
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For automatic regulation of air flow volume or shut-off of air ducts installed in various premises. Compatible with 400x200 up to 600x350 mm rectangular air ducts.


Fixing to rectangular ducts with flange connection. Mounting with galvanized bolts and clamps that fix the end flanges of the air shutter to the mating flanges of the air ducts or any other ventilation system components. While mounting provide enough space for accessing the servo actuator.


Galvanized steel case and rotary blade. Automatic control of the regulating mechanism with a servo actuator installed on the damper shaft. Three-point circuit provides regulation of the rotary blade; adjustable with mechanical stop blocks, maximum angle 95°. The servo actuator has overheating protection. Switching to manual control mode if required.

Parameter AVK 40x20 Measurement unit
Connected air duct size 400х200 mm
Weight 3.6 kg
Casing material galvanized steel -
Air duct for rectangular air ducts -
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AVK (rectangular) - data sheet (pdf 250.61Kb)
AVK (rectangular) - image (png 508.77Kb)
Overall dimensions
Overall dimensions

Model Dimensions [mm]
B B1 B2 H H1 L
AVK 40x20 400 440 503 200 240 202
Designation key
Designation key
Series Flange size [cm]
AVK 40x20; 50x25; 50x30; 60x30; 60x35