Special Production

Sometimes, installing a fan requires special attention in terms of safety and functionality. The solutions we have developed are suitable for different requirements and cases and comply with EC directives.

Home/
  1. Atex Fans
    1. Atex Centrifugal Fans
    2. Atex Axial fans
  2. Hot Gases Fans
  3. Insulated Disc
    1. Insulated Disc
    2. Fully insulated fans
  4. Fan case made of two halves
  5. Plug Fan
  6. Heavy Duty Construction

Atex Centrifugal Fans

The specified temperatures are the minimum and maximum permissible values in accordance with the declaration in the “Statement of conformity” issued by TÜV Italia srl. For temperatures < -10°C you must use suitable materials.

 

Directly coupled fans, executions 4 and 5

 
TEMPERATURE CLASS
AMBIENT 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, executions 1, 8, 9, 12

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

FAN 3GD

The following characteristics are mandatory:

  • inspection opening to check for the presence of dust deposits inside the fan case and the maintenance of the necessary gaps between moving parts and fixed parts;
  • a brass coating on the inlet port and a clearance disc between the fan case and the impeller on the transmission side;
  • a seal if the motor is B3 (if the motor is B5 the flange is sufficient to guarantee a seal);
  • suitable gaskets to avoid excessive escape of fluid from the flanges;
  • protective grilles on the inlet and outlet*;
  • above 11 kW the fan casing must be gas metal arc welded;
  • appropriate motor in relation to the area of use.
 
 

*) 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 machinery and therefore completely protected. Normally the fan is not a stand-alone system but rather a partly completed machine that is designed for incorporation in more complex systems. Once a thorough risk analysis has been carried out, if safety is guaranteed by the systems themselves, the user is allowed only to remove any guards that are surplus to requirements. Said guards must anyway be kept on hand so that they are available for installation if the fan undergoes a change in its intended use.
In addition to the above points, transmission fans must have: antistatic and flame-retardant belts, guards with brasslinings, suitable versions of interior cases.

FAN 2GD

The same prescriptions already provided for the 3GD are applicable, and, in addition, the casing must always be welded and the motor must be suitable in relation to the various operating environments. Transmission fans can be certified individually (execution 1) or as “assemblies of components” (executions 8, 9, and 12).