First, we have to consider the exhaust pressure and the quantity of the exhaust.
According to the national 
regular, the exhaust pressure of general purpose air compressor is 0.7 MPa (7 atmospheric pressure) and the old standard is 0.8 MPa (8 atmospheric pressure). As the design functioning pressure of pneumatic tools and wind machinery is 0.4 Mpa, the functioning pressure of atmosphere compressor can fully meet the requirements. If the atmosphere compressor utilized by the consumer is bigger than 0.8MPa, it should be specially manufactured. The method of forced pressurization can not be adopted to avoid accidents.
How big is the exhaust is also one of the main parameters of the air compressor. Choosing the air flow volume of the surroundings compressor should match its own exhaust volume and leave a 10% margin. If the air flow volume is large and the atmosphere compressor exhaust volume is little, when the pneumatic tools begin, the exhaust pressure of the atmosphere compressor will be greatly reduced, but the pneumatic tools can’t be driven. Of course, it is also wrong to pursue huge exhaust capacity blindly, since the larger the exhaust capability, the larger the motor allocated by the air compressor, not merely the higher the purchase price, but also a waste materials of buying funds, and the use of electric power and energy will end up being wasted.
Consider the combination of gas areas and conditions.
If the use of air space is narrow, it must be vertical; if there is a long-distance transformation in the utilization of air (a lot more than 500 m), mobile type is highly recommended; if the use of electricity can’t be utilized, diesel engine driving type should be selected; when there is simply no circulating drinking water in the use of occasions, air-cooled type should be chosen. In the air-cooled and water-cooled cooling settings, many users have an incorrect proven fact that water-cooled is great, but in fact it is not. The air-cooled type accounts for more than 90% of the tiny compressors in the home and abroad. That is since the air-cooled type is easy in design and no water source is needed used. There are four fatal shortcomings of water-cooled compressor: it will need to have a complete top 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.
Then consider the compressed quality of air.
Generally, compressed air produced by air compressor contains a specific quantity of lubricating oil and water. In some cases, it really is prohibited from essential oil and water. At the moment, attention ought to be paid not only to the selection of compressor, but also to the addition of Rotary Piston Vacuum Pump auxiliary gadgets when necessary.
Lastly, it is to expand the knowledge of reference.
1. Balance: With the strong rise of China’s overall economy and the constant emancipation of the thoughts of all sorts of manufacturers, manufacturers from coast to coast are busy with creation work. In the process of production, surroundings compressors, which play a significant role, are often fully loaded and operate all-weather. In the entire production of factories, air compressor gas production is usually unstable, which is a very troublesome thing, often will bring incalculable losses. Therefore, whenever we purchase atmosphere compressors, the first criterion is the stability of air flow compressors. At the moment, some high-end brands both at home and overseas can meet this requirement. With the mature technology of adjustable frequency air compressor, it can be thought to meet this requirement.
2. Gas production: The second reason is gas creation. Some enterprises possess very good quality of gas. For instance, in the pharmaceutical market, basically the gas they need is oil-free of charge. In this regard, it is still predicated on the enterprise’s personal situation. If the business includes a high demand because of this, then it’s been a long time to buy more well-known machines. If the demand is not high, it depends upon other situations. As the future development development of the surroundings compressor industry, the variable frequency air compressor is still very exceptional in gas production, since the variable frequency atmosphere compressor has a prominent characteristic of monitoring gas production, and at the same time the gas quality created is very considerable.
3. Power consumption: That is a comparatively important place as well as the focus of dialogue, because air compressor, as a simple equipment, is generally managed all-weather, and surroundings compressor itself is a very power-consuming equipment, the general manufacturer of air flow compressor power consumption makes up about 20-30% of the total plant power usage. If effective control, the effect is very apparent. Many domestic enterprises are actually pursuing the bottom price. In fact, the bottom price is rather one-sided. For general creation enterprises, the price of atmosphere compressor only accounts for 5% of the full total cost of surroundings compressor, 9% of the maintenance and labor costs, and 86% of the total cost of energy. Therefore, considering the last expenditure, the frequency conversion air compressor should be much lower than the ordinary air compressor. Frequency conversion air compressor is only the first expenditure, but invest the the electricity price into account, you really can calculate a bill. Currently, the overall energy-saving amount of frequency converter air 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 12 months can recover the difference. Therefore, when choosing air compressor, choosing a good variable frequency air compressor is really the best answer to the issue of power consumption.