Performance differs from that of the standard fan. Its feasibility depends on the size of the motor.
Directly coupled fans, arrangements 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 (Max temp. allowed by motor) |
-20 ÷ +40°C |
-20 ÷ TX (Max temp. allowed by motor) |
The following characteristics are mandatory:
The impellers can be made of aluminium or fi breglass reinforced polyamide:
*) The ATEX directive and the CE mark impose compliance with the machinery directive, so, in normative terms, the Atex fan must be considered as a partly completed machine and therefore protected. Users who, on the basis of a thorough risk analysis, consider it appropriate to remove the protections, should preserve them carefully so that they are available for installation if the fan undergoes a change in its intended use.
The same prescriptions already provided for the 3GD are applicable, and, in addition, the motor must be suitable in relation to the various operating environments.