Sechs Faktoren für die Auswahl eines Luftkompressors

Air compressor is an important equipment for providing power for production. Scientific selection and purchase is very important for users. This issue introduces six points to pay attention to when selecting air compressors, which can help you save energy scientifically and provide powerful power for production.

1. Consider exhaust pressure and exhaust volume

The air volume of the air compressor should match the required exhaust volume, leaving at least 10% margin. If the air end is far away from the air compressor, or there is a small budget to add new pneumatic tools in the near future, the margin can be increased to 20% .

If the air consumption is large but the air compressor exhaust volume is small, it cannot drive air tools. If the air consumption is small but the exhaust volume is large, the air compressor will increase the number of loading and unloading times, or the air compressor will run at a low frequency for a long time, resulting in energy waste .

When selecting an air compressor, the formula is:

Air requirement = all tools + machinery and equipment + related process air consumption + leakage + wear + future air consumption + usage coefficient (1.1 to 1.2).

In addition, when selecting the exhaust volume, it is also necessary to consider the peak usage, normal usage and trough usage, and whether the gas consumption in the work section is stable or fluctuating. For example: when the pressure and gas consumption in workshop A are basically the same during production, the air compressor needs to be always on, and either the industrial frequency series or the permanent magnet series can be used; the gas consumption and pressure fluctuations in workshop B are relatively large, and some of the gas-using equipment are always on, so it is more appropriate to choose the permanent magnet series. If the gas consumption in multiple workshops is uneven, multiple air compressors with smaller exhaust volumes can be connected in parallel to obtain a larger exhaust volume, and they can be turned on one by one as the gas consumption increases to save energy.

The exhaust pressure of an air compressor refers to the gas pressure (gauge pressure) that is finally discharged from the compressor, and its unit is: MPa. The industry often uses “kilogram” as a pressure unit, 1 kilogram = 0.1 MPa.

The exhaust pressure marked on the nameplate of the air compressor is called the rated exhaust pressure. When selecting a compressor, you should not only focus on the exhaust pressure on the nameplate, but also evaluate the entire gas system, considering the pressure drop and pressure loss. Generally speaking:

The final working pressure = end user + final stage filtration + piping system + dust particle filtration + dryer + compressor adjustment range.

When selecting the model, the operating pressures of various models should also be listed. If the operating pressures differ too much, air compressors with different pressures must be purchased. The pressure should not be reduced to increase expenses.

2. Consider energy efficiency and specific power

The energy efficiency level of the air compressor is evaluated by the specific power value, that is, the air compressor power/air compressor air output.

First-class energy efficiency : products reach international advanced level, most energy-saving and lowest energy consumption;

Second level energy efficiency: relatively energy-saving;

Level 3 energy efficiency: average energy efficiency in the market.

3. Consider gas usage occasions and conditions

When the ventilation conditions are good and there is space for installation, it is more suitable to choose an air cooler; when the gas consumption is large and the water quality is good, it is more appropriate to choose a water cooler .

4. Consider the quality of compressed air

The commonly used standard for compressed air quality purity is GB/T13277.1-2008, and the commonly used international standard for oil-free air compressors is IS08573-1:2010.

The compressed air produced by the oil-injected screw air compressor contains micro oil particles, water, and dust particles. The compressed air can be purified by configuring post-processors such as air storage tanks, cold dryers, and precision filters. In some occasions where the air quality is high, a dryer can be configured for further filtration.

The compressed air of the oil-free air compressor can achieve very high air quality. The compressed air produced by the Baode oil-free series all meets the CLASS 0 standard of IS0 8573 standard.

The required compressed air quality depends on the products, production equipment and pneumatic tools. If the compressed air does not meet the standards, it will lead to a decline in product quality or damage production equipment. However, the higher the purity, the better. Excessively pure compressed air will increase equipment procurement costs and increase electricity waste.

5. Consider the safety of air compressor operation

An air compressor is a machine that works under pressure. Gas storage tanks with a capacity of more than 1 cubic meter are special production equipment, and the safety of their operation should be given top priority.

When selecting an air compressor, users must check the production qualifications of the air compressor manufacturer to ensure the product quality of the air compressor .

6. Consider the manufacturer’s after-sales service

Maintenance during the warranty period is the direct responsibility of the manufacturer or service provider, but there are still certain unknown factors during use. When the air compressor fails, whether the after-sales service is timely and the maintenance level is professional are issues that users must pay attention to.