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Equipment for Use in Potentially Explosive Atmospheres
On 1st July 2003, the Directive 94/9/EC (ATEX - ATmosphères EXplosives) became effective and enforces on equipment and systems for use in potentially explosive atmospheres in the territory of the European Community.
The Directive relates not only to electrical equipment, but also to all kinds of machines, materials, apparatus, fixed or mobiles devices, control components and instrumentation thereof and detection or prevention systems which, separately or jointly, are intended for the production, transport, storage, measurement, control and conversion of energy, or the processing of materials and which are capable of causing an explosion through their own potential source of ignition.
The environments (petrochemical, pharmaceutical, cosmetic, painting manufacturing, texture dyeing, paper production, woodworking, etc) where basically power transmission equipment are installed, are involved by the Directive ATEX and therefore, speed reducers are included both as geared motors and gearboxes alone.
ATEX are according with the Directive Atex and therefore, qualified to installation in areas of Group II, Category 2 and 3 with explosion danger in presence of gas (Zone 1 or Zone 2) and of combusti?ble dust (Zone 21 or Zone 22).
The gearboxes VARVEL-ATEX are available for the following series:
| RD – helical speed reducers |
Available for sizes 0, 1, 2, 3 and 4 |
| RP – helical speed reducers |
Available |
| XA – helical speed reducers |
Available for sizes 63, 71 and 80 |
| RC – helical speed reducers |
Available for all sizes |
| RN – parallel shaft speed reducers, shaft mount |
Not yet available |
| RO – bevel/helical speed reducers, horizontal mount |
Not yet available |
| RV – bevel/helical speed reducers, vertical mount |
Not yet available |
| RS – worm speed reducers |
Available for all sizes |
| RT – worm speed reducers |
Available for all sizes |
| RG – planetary speed reducers with reduced backlash |
Not available |
| VR – mechanical speed dry friction variators |
Not available |
| VS – mechanical planetary oil lubricated variators |
Not available |
According with the Directive Atex, the gearboxes of Series VARVEL-ATEX are marked II 2 GD ck IP66 Tmax=120°C or Tmax= 135°C – Tamb -20/+55 °C
where:
- II Group II (surface industries)
- 2 Category 2
- G Explosive atmosphere with presence of gas, clouds, vaours in Zone1 (2G) and Zone2 (2G and 3G)
- D Explosive atmosphere with dust presence in Zone 21 (2D) and Zone 22 (2D and 3D)
- IP66 Protection
- Tmax Max. Surface Temperature
- Tamb Ambient Temperature
The relevant Technical Files are deposited at Notified Body of European Community. | | |
 
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