What is the general pressure range of screw air compressor

The pressure range of screw air compressors varies depending on the model and application scenarios, but is usually set to0.7~1.3MPa (about 7~ 13kg pressure), the following is explained from the principles, application scenarios and influencing factors:

1. Standard pressure range

1. General industrial applications

• low pressure air compressor: Pressure range is usually0.7~1.0MPa (7~ 10kg), suitable for most pneumatic tools, purging, packaging and other scenarios.
• Medium pressure air compressor: Pressure can reach10 ~ 13MPa (10~ 13kg), used for processes with high pressure requirements, such as spraying, cutting or gas supply to specific industrial equipment.

2. Special high-pressure requirements

• Some special scenarios (such as deep-sea operations, high-pressure gas transportation) require customized models, and the pressure can be reachedAbove 1.3MPa, but requires a dedicated cooling and control system.

2. Factors affecting the scope of pressure

1. equipment design

• Rotor diameter and speed: Large diameter rotor or high-speed design can increase exhaust pressure.
• compressed series: Multi-stage compression (such as two or three stages) can significantly increase output pressure, but increase cost and maintenance complexity.

2. cooling system

• cooling method: Water-cooled models usually support higher pressures than air-cooled models. Because of their higher cooling efficiency, they can effectively control the temperature rise during the compression process.
• cooler performance: Cooler clogging or reduced efficiency can cause exhaust temperature to rise and limit pressure output.

3. control system

• Loading and unloading pressure difference: Generally, the pressure difference between loading and unloading is set to0.1~0.2MPa, too small will lead to frequent starts and stops; too large, pressure fluctuations will be obvious.
• Pressure sensor accuracy: Sensor errors directly affect the stability of pressure control.

4. environmental factors

• ambient temperature: High temperature environments will reduce air density, and the compression ratio needs to be increased to maintain pressure and increase energy consumption.
• altitude: The air in high altitude areas is thin, so you need to choose a model specially designed for plateau.

3. Typical pressures in different application scenarios

4. Pressure adjustment and maintenance recommendations

1. Pressure setting principles

• loading pressure: Set according to the needs of gas equipment, usually lower than unloading pressure0.1~0.2MPa。
• unload pressure: Avoid excessive energy consumption resulting in increased energy consumption; too low will lead to insufficient pressure.

2. regular maintenance

• Replace the third filter: Air filter, oil filter, and oil separator core need to be replaced regularly to prevent clogging from affecting pressure output.
• Cooling system inspection: Clean cooler fins or scale to ensure cooling efficiency.

3. troubleshooting

• insufficient pressure: Check the leakage point, intake valve opening, and rotor wear.
• pressure is too high: Calibrate the pressure sensor and check whether the unloading valve is stuck.

V. Conclusion

The pressure range of screw air compressor needs to be selected according to actual needs, and conventional industrial applications are based on0.7~1.0MPamainly. By optimizing equipment selection, regular maintenance and precise pressure setting, efficient and stable operation of the air compressor can be ensured. For special high-pressure needs, it is recommended to consult the manufacturer for customized solutions.