First Stage
Air is drawn into the cylinder and is compressed to an intermediate pressure by a set of pistons. Once this process is complete, the partially compressed air is pushed out into an intercooler.
Intercooling
This is a vital step before the second stage of compression. The intercooler cools the air, reducing the work required in the subsequent stage and also reducing the risk of overheating. Cooler air can be compressed more efficiently and with less strain on the equipment.
Second Stage
The cooled, partially compressed air enters a second cylinder, where it undergoes further compression by another set of pistons. By the end of this stage, the air reaches its final desired pressure.
Conclusion
The advantage of the 2-stage process is its efficiency. By breaking down the compression into two distinct stages and cooling the air in between, the compressor can achieve higher pressures than a single-stage unit, using less energy and producing less heat. This design not only prolongs the compressor’s lifespan but also ensures more consistent, reliable performance, making it a preferred choice for many industrial applications.