First, we should consider the exhaust Screw Air Compressor pressure and the volume of the exhaust.
According to the national regular, the exhaust pressure of general purpose atmosphere compressor is 0.7 MPa (7 atmospheric pressure) and the old regular is 0.8 MPa (8 atmospheric pressure). As the style working pressure of pneumatic tools and wind machinery is definitely 0.4 Mpa, the functioning pressure of air flow compressor can fully meet the requirements. If the air flow compressor utilized by the consumer is larger than 0.8MPa, it must 
be specially manufactured. The method of forced pressurization can not be adopted in order to avoid accidents.
How big is the exhaust is also one of the primary parameters of the air compressor. Choosing the atmosphere volume of the air flow compressor should match its exhaust quantity and leave a 10% margin. If the atmosphere volume is huge and the air flow compressor exhaust volume is little, when the pneumatic tools start, the exhaust pressure of the atmosphere compressor will be greatly reduced, however the pneumatic tools can not be driven. Of program, additionally it is wrong to pursue huge exhaust capacity blindly, since the larger the exhaust capability, the larger the electric motor allocated by the air compressor, not merely the higher the price, but also a waste of purchasing funds, and the use of electric power and energy will end up being wasted.
Consider the combination of gas fields and conditions.
If the use of air space is narrow, it must be vertical; if there is a long-distance transformation in the use of air (a lot more than 500 m), mobile type should be considered; if the utilization of electricity can not be used, diesel engine generating type ought to be selected; when there is simply no circulating drinking water in the utilization of occasions, air-cooled type ought to be selected. In the air-cooled and water-cooled cooling modes, many users have a wrong idea that water-cooled is great, but in fact it isn’t. The air-cooled type makes up about a lot more than 90% of the small compressors in the home and abroad. This is because the air-cooled type is easy in design no water source is needed used. There are four fatal shortcomings of water-cooled compressor: it will need to have a complete upper and lower water system with large purchase; water-cooled cooler has brief life; it is simple to freeze the cylinder in winter season in the north; it’ll waste a lot of water in normal operation.
After that consider the compressed quality of air.
Generally, compressed air made by air compressor contains a particular quantity of lubricating oil and water. In some cases, it really is prohibited from essential oil and water. At the moment, attention should be paid not only to selecting compressor, but also to the addition of auxiliary gadgets when necessary.
Lastly, it is to expand the knowledge of reference.
1. Stability: With the strong rise of China’s overall economy and the constant emancipation of the minds of all sorts of manufacturers, manufacturers all over the country are busy with creation work. Along the way of production, air flow compressors, which play an important role, are often completely loaded and operate all-weather. In the full production of factories, air flow compressor gas production can be unstable, which is a very troublesome thing, often will bring incalculable losses. Therefore, when we purchase air compressors, the first criterion is the stability of atmosphere compressors. At the moment, some high-end brands both in the home and overseas can meet this necessity. With the mature technology of adjustable frequency air compressor, it can be said to meet this requirement.
2. Gas production: The second reason is gas creation. Some enterprises possess very high quality of gas. For example, in the pharmaceutical industry, basically the gas they want is oil-free. In this regard, it is still based on the enterprise’s own situation. If the business has a high demand because of this, then it’s been a long time to purchase more well-known devices. If the demand is not high, it depends upon other circumstances. As the near future development development of the air flow compressor industry, the adjustable frequency air compressor is still very excellent in gas production, because the variable frequency air compressor includes a prominent characteristic of tracking gas production, and at the same time the gas quality produced is very considerable.
3. Power consumption: That is a relatively important place and also the focus of conversation, because atmosphere compressor, as a simple equipment, is generally operated all-weather, and air compressor it
self is an extremely power-consuming equipment, the overall manufacturer of air flow compressor power consumption accounts for 20-30% of the full total plant power intake. If effective control, the result is very obvious. Many domestic enterprises are now pursuing the base price. In fact, the bottom price is rather one-sided. For general production enterprises, the purchase price of air flow compressor only makes up about 5% of the total cost of air compressor, 9% of the maintenance and labor costs, and 86% of the total cost of electricity. Therefore, considering the final expenditure, the frequency conversion air compressor should be much lower than the ordinary atmosphere compressor. Frequency conversion atmosphere compressor is only the first investment, but invest the the electricity cost into account, you can really calculate a bill. Today, the overall energy-saving amount of frequency converter air flow compressor is very objective, and the domestic professional frequency converter atmosphere compressor, its power-saving price is really as high as 30%, usually within a yr can recover the difference. Therefore, whenever choosing air flow compressor, choosing an excellent variable frequency air flow compressor is really the very best answer to the problem of power consumption.