It has to have:
The impellers are made of aluminium or polyamide reinforced with glass fibres:
*) 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.
Direct driven fans, version 4 and 5
MOTOR THERMAL CLASS | FAN THERMAL CLASS | ROOM TEMPERATURE | FLOW TEMPERATURE |
---|---|---|---|
T4 | T135°C (T4) | -20 ÷ +40°C | -20 ÷ +40°C |
T3 | T200°C (T3) | -20 ÷ +40°C | -20 ÷ +40°C |
TX | TX (Tmax allowed by the engine) | -20 ÷ +40°C | -20 ÷ TX (Tmax allowed by the motor) |