The 9/WDS-ABL is a non-return damper specially designed for our RA 15-60 and AB 30/60 exhaust fans. Depending on the fan type, one side is fixed so that the wind pressure protection for the corresponding fan functions properly.
Installation
The installation of the non-return damper 9/WDS ABL is carried out in the round duct 9/R 160.
Art.-no. 39970