Special fans - ATEX Centrifugal Fans

VentilationATEX Centrifugal Fans

Description
3GD FAN

It has to have:

  • the inspection door to check that there is no dust deposit inside the nut and that the necessary gaps between moving and fixed parts are maintained;
  • a brass coating on the suction inlet and a shim between the nut and the impeller on the transmission side;
  • a seal if the motor is B3 (if B5 the flange is sufficient to guarantee the seal);
  • suitable gaskets to avoid excessive fluid leakage from the flanges;
  • suction and discharge protection nets*;
  • above 11 kW the fan housing must be continuously welded;
  • motor suitable for the area of use.
ATEX Directive

The ATEX directive and the CE marking impose the respect of the machine directive, therefore the Atex fan, at normative level, must be considered as a quasi-machine and therefore completely protected. The fan is usually not a system on its own, but it is integrated inside more complex systems. Once a careful analysis of the risks has been carried out, if the safety is guaranteed by the systems themselves, the user is allowed to remove only the protections that are excessive. These protections must however be left together with the fan in view of a possible change of use of the same.
In addition to the points above, Transmission Fans must have: antistatic and non-propagating belts, casing with brass washers, monoblocks suitable version.

FAN 2GD

Exactly what has been said for the 3GD is valid, but the case must always be welded and the motor must be suitable for the different area of use. The return fans can be certified individually (execution 1) or as "component assembly" (execution 8, 9, 12).

https://www.meridianaaspiratori.com/wp-content/uploads/2021/02/ventilatori_centrifughi_atex-1.jpg
https://www.meridianaaspiratori.com/wp-content/uploads/2021/02/centrifughi-atex.jpg
Technical features

 

Direct driven fans, version 4 and 5 

THERMAL CLASS ROOM TEMPERATURE WORKING TEMPERATURE
T135°C (T4) -20 ÷ +40°C -20 ÷ +40°C
T200°C (T3) -20 ÷ +40°C -20 ÷ +105°C *
T300°C (T2) -20 ÷ +40°C -20 ÷ +150°C *

 

 

Transmission fans, version 1, 8, 9, 12 

THERMAL CLASS ROOM TEMPERATURE WORKING TEMPERATURE
T200°C (T3) -20 ÷ +40°C -20 ÷ +55°C
T300°C (T2) -20 ÷ +40°C -20 ÷ +135°C

 

 

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