9. Special conditions of employment
9.1 Gases other than air. Vacuum
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Ambient gases other than air: the problem is so vast that it can only be addressed by recommending :
seek specialist advice on corrosion ;
consider the risks of condensation and re-vaporization, the effects of viscosity on lift, the risks of gas ignition on contact with the bearing, which may be heated by seizure, and, with abrasive dust-laden gases, protect bearings with seals.
Vacuum ( , § 6.1): the vacuum prohibits the use of greases or oils that vaporize. Solid lubricant-based materials must therefore be used. For bearings, special cages and/or treatments are...
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Special conditions of employment