10 Factors to take into consideration when choosing air compressor
Cost, energy saving, machine lifespan extension, pressure stability preservation, contamination and sound reduction, and suitable initial machines are all important factor to take into. These below are 10 factors that should be taken into consideration.
1. Air compression objective : Only few customers would actually be factoring in air compression when considering air compressor: power exchange system, parameter, machine cooling system, usage measurement, and different compression method. Initially, factory planners create as much as usage as pressure substitute resulting wasting the system electricity.
2. Pressure : Users should first understand the maximum and minimum air usage of each section before adding more pipes or purifying area as these factors will require to lower full load and unload pressure of the compressor. This can alter the amount of pressure from the compressor.
Normally, pipe pressure loss rate is at 0.5 kg/cm2. Mandatorily, air compression requires air purification and air drying through pipes or filter which can lower pressure by approximately 0.3-0.5 kg/cm2 (filter + air dryer).
3. Air volume : Users often choose compressors by specifying the “horsepower” but specifying “air volume” is more holistically correct. Air volume should be referenced from maximum load to incur different type and size. Try to match the waste air in different period of time to the discharge amount then choose compressor depending on the initial and final “base load” changing whether to use screw or centrifugal type.
"Inverse Load" utilize many screws along with frequency changer.
"Spontaneous Load" respond by utilizing high pressure compressor and large air tank.
Choosing the air discharge volume should consider the following factors:
(A) Current need
(B) Possible pipe flow volume
(C) Possible future plans
(D) Usage range
4. Quality indicator : Just like how we have different water for washing and drinking, compression also has different usages. We separated air usages into a few things like air for production (PA), air for instrument (IA), air for breathing (BA), and other special usages (SPA). These usages are often determined by the quality of air according to ISO -1 standard. If the quality is too good for the usage, energy will be wasted. If the quality is too low, it might affect the production line, so meticulous and precise planning is required.
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Oil-free type: Parts that are made from special lubricant material don’t require the need of oil to lubricate while still achieving the compression resulting in oil-free air. This can meet the demand of oil-free air in some industries that require extreme precision: medical, food, semiconductor, and coating.
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Oil compressors often come with oil waste, oil contamination, and oil in discharged water problem which all need to be properly disposed according to environmental law.
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