How big is the air compressor of general equipment

The selection of air compressors should be determined according to the specific needs and usage scenarios of the equipment. The capacity or power range of air compressors usually equipped with different equipment is quite different. The following is a detailed analysis of the selection of general equipment air compressor:

1. air compressor types and applicable scenarios

1. piston air compressor
   • applicable Scenarios: Small and medium-sized exhaust volume requirements, such as small repair shops and laboratories.
   • Features: Simple structure, low cost, but large vibration, high noise, frequent maintenance.
2. Screw air compressor
   • applicable Scenarios: Large exhaust volume requirements, such as industrial production lines and pneumatic tools.
   • Features: Stable operation, low noise, high efficiency, but the initial investment and maintenance costs are high.
3. Centrifugal air compressor
   • applicable Scenarios: Scenes with extremely large exhaust volume, such as air separation devices and metallurgical and chemical industries.
   • Features: Complex maintenance, suitable for continuous and stable operation environment.

2. technical parameters matching principle

1. exhaust volume (m & sup3;/min)
   • selection basis: Select according to the gas demand of the equipment, and consider the peak flow and continuous flow.
   • Example:
     • small equipment: 0.5-2 m & sup3;/min.
     • Medium production line: 5-15 m & sup3;/min.
     • Large industrial scenario: 20 m & sup3;/min or more.
2. Exhaust pressure (bar)
   • selection basis: Add 1-2 bar margin to the required pressure at the gas end to cover the pipeline loss.
   • Example:
     • routine industrial applications: 8-10 bar.
     • High-pressure scenarios (e. g. pneumatic tools):13 bar or more.
3. Power (kW)
   • selection basis: It is proportional to the displacement and pressure, and excessive configuration should be avoided.
   • Example:
     • small air compressor: 5.5-15 kW.
     • Medium air compressor: 15-50 kW.
     • Large air compressor: 50-315 kW.

Adaptation of 3. environment and working conditions

1. ambient temperature
   • high temperature environment needs to choose high temperature resistant model or increase cooling measures.
   • Low temperature environment needs to consider the fluidity of lubricating oil.
2. Altitude
   • the air density in high altitude areas is low, so it is necessary to choose a larger capacity air compressor.
3. Noise requirements
   • for noise-sensitive scenes (such as precision workshops), low-noise models should be selected.

4. energy saving and maintenance costs

1. energy efficiency ratio
   • choosing a high energy efficiency ratio air compressor can reduce long-term operating costs.
   • The variable frequency screw air compressor has remarkable energy saving effect under partial load.
2. Maintenance convenience
   • priority will be given to models with modular design and easy maintenance.
   • Evaluate the replacement cycle and cost of consumables such as filter elements and lubricating oil.

5. industry practice recommendations

1. light industry (e. g. packaging, textiles)
   • demand: Low pressure and large displacement, pressure 0.5-0.8 MPa.
   • Selection: Screw air compressor, power 15-45 kW.
2. Heavy industry (e. g. mining, metallurgy)
   • demand: Compressed air with high pressure and large displacement.
   • Selection: Centrifugal or large screw air compressor, power above 50 kW.
3. Mobile work (e. g. construction site)
   • demand: Portability and high efficiency.
   • Selection: Diesel-driven mobile air compressor, flow 1.6-16.8 m & sup3;/min.

Summary

air compressor selection needs to consider the equipment requirements, working environment and energy saving characteristics. By matching the technical parameters such as displacement, pressure and power, the most suitable air compressor type is selected to ensure the efficient operation of the equipment and reduce the energy consumption cost. It is recommended to consult the manufacturer or professional engineer for customized selection according to the specific working conditions.