Air compressors can be classified from several dimensions, such as working principle, pressure level, lubrication method

Air compressors can be classified from several dimensions, such as working principle, pressure level, lubrication method, and application.

Increase pressure by "reducing the volume of air".

Features:

• Cheap
• High stress
• Loud noise
• Suitable for intermittent work

Commonly used in:

• repair shop
• small factory
• Home air pump

Features:

• Stable continuous gas supply
• Low noise
• High efficiency
• Most common in industry

Commonly used in:

• manufacturing
• CNC factory
• Automated production line

Features:

• Very quiet
• Clean air
• Low maintenance

Commonly used in:

• Medical
• laboratory
• food industry

Features:

• Ultra-high bandwidth
• Suitable for large factories
• High initial costs

Commonly used in:

• petrochemical
• steel mill
• power plant

• Use lubricating oil
• Long lifespan
• Low cost
• Air may contain oil

Suitable:

• General Industry

Features:

• Cleaner air
• Higher cost
• High maintenance requirements

Suitable:

• Medical
• food
• Electronics industry

• Generally < 1.0 MPa

• 1.0–10 MPa

• > 10 MPa

High voltage is typically used for:

• PET blown bottle
• Diving cylinders
• Natural gas industry

From the perspective of practical industry use:

1. Piston type → Low power, inexpensive
2. Screw type → Mainstream in industry

Many factories now use:

• Permanent magnet variable frequency screw air compressor
• Two-stage screw compressor

Because it saves more electricity.