Fan sleeves reduce the noise level by
up to 9 dB and simultaneously allow
screwless installation
Fan sleeves are considerably more than just a soft intermediate mount between the fan and housing. When correctly designed, they not only function as a mechanical decoupler and a mounting interface but also as a tolerance compensation and acoustic optimization element. They allow the quick and safe screwless installation of axial fans on mounting plates and fan housings. They act as a seal between the suction and pressure side and eliminate the transmission of vibration and oscillations emitted by the fan to the fan housing. Using a suitable fan sleeve, the noise level can be reduced by up to 9 dB. This is not only measurable but is subjectively clearly audible as a reduction of 9 dB is perceived as being significantly quieter.
What this means for developers: Waiting until the end of the project before considering the fan sleeves means wasting potential. On the other hand, however, considering them at an early stage of development can produce quieter, enhanced installation-friendly and more robust products.
Choose the best mounting option for your application:
LM fan sleeve with plug-in feet
- Direct screwless mounting on the fan housing
- Excellent decoupling between fan and housing
- Tolerance compensation for housing holes
- Quicker and less complicated installation
SLM fan sleeve with plug-in nipples
- Ideal for subsequent installation or retrofitting of existing devices
- No change to hole size required.
- Quick and screwless fan mounting without requiring tools
- Reduced structure-borne transmission of noise from the fan frame
- Compatible with standard hole dimensions
Typical errors in practice
A frequently made error is the use of fan sleeves as standard accessories without checking the interfaces with the consequence that the hole pattern, wall thickness or press-in distance are inaccurate.
A second error is insufficient mounting space. Elastic polymers require space to change their shape. If the sleeve is forced into a confined space, it can no longer function fully.
A third error is the combination of elastic sleeves and hard joints. If the sleeve is additionally rigidly secured, the decoupling of vibration is partially eliminated.
A fourth error is the missing acoustic validation in the real device. Individual measurements of the fan provided on the data sheet are inadequate. The behaviour of the installed fan is decisive, this also includes the housing, airflow, guard, filter, resonating surfaces and mounting conditions.