Why is oil lubrication in compressed air sometimes avoided in clean-room environments?

Why is oil lubrication in compressed air sometimes avoided in clean-room environments?

• A. Oil lubrication is cheaper, so not avoided.
• B. Oil aerosols can contaminate products, foul sensors, and cause cleanliness issues; non-oil-lubricated options are used.
• C. Oil lubricants improve humidity levels.
• D. Oil lubrication increases compressor efficiency.

Answer: (B)

Clean-room environments demand extremely low levels of particulates and contaminants, so any oil aerosol in the compressed air can cause problems. Lubricated compressors can release tiny oil droplets into the air stream, which may settle on surfaces, contaminate products, foul sensors and filters, or outgas and interfere with sterile processes. To meet strict cleanliness standards, oil-free compression options are used, along with thorough filtration, to keep the air free of oil. The other statements miss the main issue: oil lubrication isn’t chosen because of cost, humidity control, or compressor efficiency in this context; the primary concern in clean rooms is preventing contamination from oil aerosols.

Clean-room environments demand extremely low levels of particulates and contaminants, so any oil aerosol in the compressed air can cause problems. Lubricated compressors can release tiny oil droplets into the air stream, which may settle on surfaces, contaminate products, foul sensors and filters, or outgas and interfere with sterile processes. To meet strict cleanliness standards, oil-free compression options are used, along with thorough filtration, to keep the air free of oil.

The other statements miss the main issue: oil lubrication isn’t chosen because of cost, humidity control, or compressor efficiency in this context; the primary concern in clean rooms is preventing contamination from oil aerosols.