When choosing a good air compressor, pay attention to the following points:
1. The level of exhaust pressure and exhaust volume should be considered.
According to the national standard, the exhaust pressure of the general-purpose air compressor for aerodynamics is 0.7MPa (7 atmospheres), and the old standard is 0.8MPa (ie 8 atmospheres). Because the design working pressure of pneumatic tools and wind machinery is 0.4Mpa, the working pressure of the air compressor can fully meet the requirements. If the air compressor used by the user is greater than 0.8MPa, it generally needs to be specially made, and the method of forced pressurization cannot be adopted to avoid accidents.
The size of the exhaust volume is also one of the main parameters of the air compressor. The air volume of the selected air compressor should match the exhaust volume you need, and leave a 10% margin. If the air consumption is large and the air compressor exhaust volume is small, once the pneumatic tool is started, the exhaust pressure of the air compressor will be greatly reduced, and the pneumatic tool cannot be driven. Of course, it is also wrong to blindly pursue a large displacement, because the larger the displacement, the larger the motor that the air compressor is equipped with, not only the price is high, but also the purchase funds are wasted, and the power energy is also wasted when used.
In addition, the peak usage, normal usage and trough usage should also be considered when selecting the displacement. The usual method is to connect air compressors with smaller displacements in parallel to obtain larger displacements, and start them up one by one as the air consumption increases, which is not only good for the power grid, but also saves energy (using several compressors Several), and there are backup machines, so the failure of one machine will not cause the entire line to stop production.
2. Consider the occasions and conditions of gas use.
If the gas use site is narrow, you should choose the vertical type; if the gas use site has a long-distance change (more than 500m), you should consider the mobile type; if the use site cannot supply power, you should choose the diesel engine drive type; if the use site does not have circulating water , you should choose air-cooled. Regarding the two cooling methods of air cooling and water cooling, many users have a wrong understanding, thinking that water cooling is better, but it is not. The air-cooled type accounts for more than 90% of the small compressors at home and abroad. This is because the air-cooled type is simple in design and does not require water when used. However, there are four fatal shortcomings of water-cooled coil compressors: it must have a complete upper and lower water system, which requires a large investment; the life of the water-cooled cooler is short;
3. Consider the compressed air quality.
Generally, the compressed air produced by an air compressor contains a certain amount of lubricating oil and a certain amount of water. In some occasions, oil and water are prohibited. At this time, not only attention should be paid to the selection of the compressor, but additional accessories should be added if necessary.
4. Consider the safety of compressed air operation.
An air compressor (also called an air compressor) is a machine that works under pressure. It is accompanied by temperature rise and pressure during work. The safety of its operation should be given priority. The country implements a standardized “two certificates” system for the production of compressors, namely the compressor production license and the pressure vessel production license (gas storage tank). Usually, the product quality assurance system of certified manufacturers is perfect, and there will be no major quality problems.
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