Guidelines for Explosion Protection and Prevention according to ATEX 94/9/EG, (ATEX 95)

1. Danger of explosion occurs under the convergence of the following conditions

The presence of ignitable agents such as gas, steam and dust
+ oxygen
+ source of ignition such as sparks, heat and chemical reactions

2. Preventive Ex- protection

Primary Ex- protection:
Prevention or limitation of a dangerous concentration of explosive atmosphere.

Secondary Ex- protection
In the presence of ignitable sources or an ignitable atmosphere, the prevention of explosion through technical means.

3. Zoneneinteilung

Classification of hazardous areas
Zone 0 There are potentially explosive mixtures present constantly or over a longer period of time
Zone 1 Potentially explosive mixtures can occasionally be expected in the normal case
Zone 2 Potentially explosive mixtures are not expected in the normal case but possibly at short notice

4. Items to be considered regarding centrifuges

  • hot surfaces
  • mechanically generated sparks
  • electrostatic charging or electric discharging
  • chemical reactions
  • flames
  • hot gases

5. Second First Machine GmbH benefits and services

We provide the user with all instructions for:
  • installation of machines
  • centrifuge operating methods
  • maintenance instructions
  • safe parts and components

6. Our services for the refitting of used centrifuges according to ATEX guidelines include:

  • monitoring of the main bearings temperature via PT 100
  • inspection of bearing lubrication by oil lubrication
  • vibration monitoring with sensors
  • the use of suitable sealing material in agreement with the user
  • conductive drive belts or power belts
  • leak tightness test of the body of the machine

7. We provide a hazard analysis and risk assessment according to the following procedure:

  • hazard appraisal
  • risk appraisal
  • risk assessment
  • risk reduction options
These are elements of the equipment documentation.