FHN non-return flap

It is used in FHN-type fans designed to operate on the ‘clean side’.

The main function is to prevent air backflow in the system, thus maintaining flow stability and minimising energy losses.

The use of a non-return flap guarantees very high performance of the fan and many years of reliable, trouble-free operation.

The flap's sturdy design and precision workmanship make it ideal for demanding operating conditions.