Preparation Work for New Air Compressor Purchase and Accessory Selection When purchasing a new air compressor, many customers are unclear about the key points in selection, accessories, site selection, etc., and do not understand the accessories that need to be equipped to meet air consumption requirements, and site selection is unreasonable. Therefore, I specially write an article to provide you with reference.
1. Air Compressor Selection
The two most common types of air compressors on the market: screw air compressors (below 1.0Mpa), piston compressors have higher pressure, generally ranging from several megapascals to tens of megapascals.
2. Displacement Selection
According to the air consumption of gas equipment and the number of gas points, estimate the total air consumption. The air volume of the air compressor should be at least 10% greater than the total air consumption.
3. Air Receiver Selection
First, select the pressure-bearing capacity of the air receiver according to the pressure. Then according to V=N×Q÷(P+1), where: V: air receiver volume Q: air compressor displacement P: exhaust pressure, N is a constant, users with stable air consumption take 1~2, frequent fluctuations but small fluctuation range take 3, frequent fluctuations and large range take 4 or more.
4. Dryer Selection
Divided into refrigerated dryers and adsorption dryers. Generally, it is based on the air compressor displacement, pressure, temperature and the pressure dew point required by the gas equipment. If the pressure dew point is greater than 0℃, a refrigerated dryer is selected. If the pressure dew point is less than 0℃, an adsorption dryer is selected, and the general pressure dew point value can be met. If it is special production gas, such as pharmaceutical factories, food factories, breathing use, chemical industry, etc., the refrigerated dryer and adsorption dryer can be connected in series. Note that the refrigerated dryer is on the side close to the air compressor. There are also two refrigerated dryers connected in series, but the specific combination depends on the requirements of the gas equipment.
5. Pipeline Precision Filter Selection
For general gas requirements, use C, T, A level filtration, where C level is oil-water separation, T level is main pipeline filtration, A level is micro oil mist filtration, oil removal efficiency 99.999%. In addition, there are H level deodorization activated carbon filter; Z level steam filter; G level oil removal filter. For high-quality filter products suitable for industrial air compressors, you can visit our product website at https://www.kpkfilter.com/products/.
Other Considerations
The above 5 items basically cover the general selection basis of air compressors and their auxiliary equipment. There are also some other non-equipment factors that need attention.
a. Altitude
The higher the altitude, the worse the cooling effect, the larger the compression ratio, the faster the motor temperature rise, and the greater the air water content and oil and gas content. The displacement decreases, and the overall efficiency of the air compressor decreases.
b. Installation Site
Indoor dry place, as close as possible to the gas point.
Well-ventilated place, clean air, no metal dust, paint dust, chemicals or dust. And not close to water sources.
It is best to arrange a hook that can be lifted above the unit.
Leave space for maintenance during installation.
Concrete structure platform, height between 150-300mm; screw machine has small vibration, so only need the ground to be flat and level to meet the requirements.
Reserve drainage pipe trenches in the installation site.
c. Other Accessories
Other accessories such as pipelines, valves, brackets, etc. can be purchased according to the budget. Generally, cast steel or 304 stainless steel pipes are sufficient.
d. Drainage Pipeline
The drainage of each filter, air bottle, refrigerated dryer, adsorption dryer drainage pipeline, arrange the line, the pipeline is generally DN15 galvanized pipe.
Incomplete details, please criticize and correct.