FANS AND FIRE PROTECTION

The aerodynamic and acoustic performance data of fans are determined on standardised test rigs in accordance with DIN EN ISO 5801 and DIN EN ISO 5136. The test rigs are used for tests on prototypes in the development phase, for measurements to create scalable model characteristics as well as for internal and customer acceptance tests.

Two pipe test benches with diameters of 500 mm and 710 mm and a chamber test rig are available for this purpose. The test rigs meet the requirements of DIN EN ISO 5801 and also fulfil the requirements of AMCA 210.

Two mobile pipe test benches with diameters of 400 mm and 1000 mm are also available for development and approval measurements.

The fans to be analysed are installed in the pipe section or on the chamber test rig in accordance with the installation regulations A, B, C, D as per DIN EN ISO 5801.

The chamber test rig was designed for a maximum volume flow of approx. 200,000 m³/h and a maximum pressure increase of 20,000 Pa. The dimensions are: Length 10 m; width 5 m; height 4 m, and thus a total volume of 200 m³. The maximum possible electrical input power of the system is 315 kW.

The pipe test rigs offer the possibility of testing the suction and pressure-side sound power of fans using the duct method in accordance with DIN EN ISO 5136. It is also possible to determine the sound power of the fans using the enveloping surface method in accordance with DIN 45635 Part 38. In addition, the directional characteristics and radiated noise of casings can be analysed and determined.

The aerodynamic and acoustic measurements are carried out fully automatically using a pre-configured measurement sequence and evaluation programme.

Thrust test rig for jet fans according to DIN EN ISO 13350 

The data on thrust, sound power, discharge velocity and electrical performance of jet fans are determined on standardised test rigs in accordance with DIN EN ISO 13350.

In particular, the starting currents of the fans are also determined in order to evaluate the maximum loads on the electrical power supply when several fans or fan groups are switched on at the same time. Fans with an impeller diameter of up to 1400 mm can be analysed.

Vibration test rig for determining resonance frequencies on fans or components to ensure low-vibration operation and evaluate the dynamic loads on components in all permissible operating states.

Natural frequencies are determined by applying a defined sinusoidal oscillation amplitude using a shaker.

The component is mechanically stimulated with a shaker over a defined frequency range and the response is documented using vibration meters.

The oscillations can be visualised using a stroboscope lamp. Can be used for radial and axial impellers and all fan components as well as accessories and attachments..

Overspeed test

Carrying out load tests/overspeed tests on rotating systems to determine the maximum limit speeds by analysing the plastic deformations, and crack testing using the magnetic particle method MT.

Fire gas test rig 

Fire gas test rig for testing fans, motors, parts and components at temperatures of up to 600°C. In the event of a fire, smoke exhaust fans must remain functional for a defined period of time and temperature range in order to safely convey smoke gases out of the building. Proof is provided in accordance with DIN EN 12101-3. Hot gas fans, e.g. for dryers, must remain functional at the required temperatures at all times. To ensure the function of all mechanical and electrical components used, individual components such as motors, damper actuators, cables and impellers can be analysed under load conditions and temperature stress. The interaction of individual components or complete fans can also be analysed under temperature stress.