How Portable Air Compressors Work

There are many portable air compressors on the market today of varying sizes and power. And though they vary by size and power, they all work on just a couple of different technologies to generate air pressure.
Most air compressors work by what's called positive displacement. This is different from compressors that use rotating impellers to generate air pressure. Instead, air pressure is increased by reducing the size of the space that contains the air. Usually, this is done with a reciprocating piston.

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