Aluminum shut-off damper

ASUR-ASUP - Large-size shut-off dampers for circular connection are used to install a ventilation system in buildings with spiral or smooth ducts. The opening angle of the blade can be adjusted from 0 ° to 90 °. The blades on the inside has a sealing gasket, this type of damper tightness class is 2 according to test standard LST EN 1751. 

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