Axial fan: jet fan
max. 2000 000m³/h Witt & Sohn

The jet fans are available as an

* asymmetric type, developed with high efficiency for one direction
* symmetric type, with a partially reversibility (40%; 60%; 90%) in both directions.

With the standard jet fans thrust from 35 N up to 2500 N is available. Higher values are possible on request. With different length for the silencers, nearly every required sound pressure level can be reached. With the special developed impellers (cast in steel-bolts, etc.) very high tip speeds and very high temperatures are possible. X-raying of the impeller blades and the impeller hub is not necessary, but can be done on customer request.

The jet fans are tested according to ISO 13 350, the axial fans according to ISO 5801. Additionally all fans have to pass the factory acceptance test before delivery. The jet and axial fans are tested and certified according to EN 12 101−3.
Jet Fans

* Size: 400 to 1800 mm (bigger sizes on request)
* Casing thickness: 4 − 10 mm
* Impeller types: N, M, NR, MR (adjustable pitch at impeller standstill)

Design

* with inlet cone (for one direction: type GD / for both directions: type GDR)
* with inlet cone and silencer (for one direction: type GT / for both directions: type GR)