First, we ought to consider the exhaust Rotary Vane Vacuum Pumps pressure and the volume of the exhaust.
According to the national standard, 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). Because the style working pressure of pneumatic equipment and wind machinery is 0.4 Mpa, the working pressure of atmosphere compressor can fully meet the requirements. If the air flow compressor used by the consumer is bigger than 0.8MPa, it should be specially manufactured. The technique of forced pressurization can’t be adopted to avoid accidents.
How big is the exhaust is also one of the main parameters of the air compressor. Choosing the atmosphere volume of the surroundings compressor should match its exhaust volume and leave a 10% margin. If the atmosphere volume is large and the surroundings compressor exhaust volume is little, when the pneumatic equipment start, the exhaust pressure of the air flow compressor will be greatly reduced, however the pneumatic tools can’t be driven. Of training course, additionally it is wrong to pursue huge exhaust capacity blindly, because the larger the exhaust capacity, the larger the motor allocated by the atmosphere compressor, not only the higher the purchase price, but also a waste materials of buying funds, and the use of electricity and energy will become wasted.
Consider the combination of gas areas and conditions.
If the use of air space is narrow, it must be vertical; when there is a long-distance transformation in the utilization of air (a lot more than 500 m), mobile type should be considered; if the use of electricity can’t be used, diesel engine driving type ought to be selected; if there is no circulating drinking water in the use of occasions, air-cooled type ought to be chosen. In the air-cooled and water-cooled cooling modes, many users have an incorrect proven fact 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 simple in design and no water source is necessary used. There are four fatal shortcomings of water-cooled compressor: it 
must have a complete upper and lower water system with large purchase; water-cooled cooler has brief life; it is easy to freeze the cylinder in winter season in the north; it’ll waste a lot of water in regular operation.
Then consider the compressed air quality.
Generally, compressed air made by air compressor contains a specific amount of lubricating oil and water. In some instances, it is prohibited from essential oil and water. At the moment, attention ought to be paid not only to selecting compressor, but also to the addition of auxiliary products when necessary.
Lastly, it really is to expand the data of reference.
1. Stability: With the solid rise of China’s economy and the continuous 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 full production of factories, surroundings compressor gas production is unstable, which is an extremely troublesome thing, often provides incalculable losses. Therefore, when we purchase atmosphere compressors, the 1st criterion is the stability of atmosphere compressors. At present, some high-end brands both in the home and overseas can meet this requirement. With the mature technology of adjustable frequency air compressor, it could be said to meet this requirement.
2. 
Gas production: The second reason is gas production. Some enterprises possess very high quality of gas. For example, in the pharmaceutical market, basically the gas they need is oil-free. In this respect, it is still based on the enterprise’s personal situation. If the business includes a high demand for this, then it has been a long time to purchase more well-known devices. If the demand isn’t high, it depends upon other circumstances. As the future development pattern of the air flow compressor industry, the variable frequency air compressor continues to be very exceptional in gas production, because the variable frequency atmosphere compressor includes a prominent characteristic of monitoring gas production, and at the same time the gas quality produced is very considerable.
3. Power consumption: This is a comparatively important place as well as the focus of debate, because atmosphere compressor, as a basic equipment, is generally operated all-weather, and atmosphere compressor itself is a very power-consuming equipment, the general manufacturer of atmosphere compressor power consumption accounts for 20-30% of the total plant power usage. If effective control, the result is very apparent. Many domestic enterprises are now pursuing the bottom price. In fact, underneath price is rather one-sided. For general creation enterprises, the purchase price of surroundings compressor only accounts for 5% of the full total cost of air compressor, 9% of the maintenance and labor costs, and 86% of the total cost of electricity. Therefore, considering the last expenditure, the frequency conversion air compressor should be much lower than the ordinary atmosphere compressor. Frequency conversion atmosphere compressor is the first expenditure, but if you take the electricity cost into account, you really can calculate a bill. Today, the overall energy-saving amount of frequency converter air compressor is quite objective, and the domestic professional regularity converter air flow compressor, its power-saving price is really as high as 30%, usually within a year can recover the difference. Therefore, whenever choosing air flow compressor, choosing a good variable frequency air flow compressor is really the best remedy to the problem of power consumption.