Oil-free air compressors were mainly piston-type before. However, the mainstream models dominated by screw air compressors naturally also have oil-free screw air compressors, and from a long-term perspective, the utilization rate of screw air compressors in oil-free models will surpass piston air compressors. The first major issue of an oil-free screw air system is to determine your air compression needs, especially the end-user's requirements for air quality and quantity. So far, there are still several aspects to pay attention to when choosing an oil-free screw air compressor.
We carefully evaluate the above requirements and understand the differences between the two to ensure that we can configure the air compressor system normally. It is also very important to determine your air pressure requirements and loading requirements, which cannot be ignored. The following formally introduces several factors for selecting oil-free air compressors:
1. "Quality" of air
The quality of air is determined by the user's requirements for the dryness level and pollution level of the air. Finding out the real dryness level requirements and minimum pollution level requirements that meet production needs can save a lot of costs. This can avoid purchasing machines and models that exceed actual production needs to achieve the purpose of cost saving.
2. The "amount" of air
So how do you calculate how many air compressors are needed for the air source in the air system? This total amount is determined by your compressed air application equipment and processing equipment (the load factor also needs to be taken into account). The total air volume demand is not the sum of the maximum demand of all components but the sum of the average demand of each device.
3. Pressure demand
When calculating the minimum exhaust pressure demand, we need to take into account the different pressure levels and pressure drops of compressed air equipment. As compressed air enters from one component to another, the pressure in the equipment decreases. Some people often make the wrong judgment that the air compressor pressure is too low or unstable, thinking that it is caused by insufficient exhaust pressure.
Pressure drop means: the air pressure will decrease from the exhaust port to the actual terminal application location. The process of compressed air flowing in the system is accompanied by the generation of pressure drop. However, if the pressure drop is too large, it will lead to poor air use and increase additional energy consumption. This must be paid attention to in actual production.
4. Loading requirements
Another key to the reasonable design and operation of oil-free screw air compressor systems is to analyze the compressed air demand of the factory from a big picture perspective. In the long run, the change in air demand is an issue that cannot be ignored in system design. Some factories have high requirements for the variability of air demand. Users need to scientifically design a set of efficient and energy-saving solutions that meet their own needs, such as using multiple air compressors in parallel to obtain the most economical and affordable operating mode.
The use of oil-free screw air compressors is a creative move in the air compressor industry. Discovering problems and solving them according to local conditions is a set of intelligent systems that our air compressor practitioners provide solutions.