It is called as positive displacement compressor because air is first sucked in a chamber and then compression is achieved by decreasing area of the chamber.
Reciprocating air compressor line diagram.
So classification will help you better understand the working of the reciprocating air compressor.
A reciprocating compressor is a positive displacement machine that uses a piston to compress a gas and deliver it at high pressure.
Click the image to enlarge the simple reciprocating air compressor has a piston which reciprocates inside the cylinder wall and cylinder head.
The principle of operation is same in each type.
A reciprocating compressor or piston compressor is a positive displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure.
Reciprocating air compressor has also classified according to its stages.
The intake gas enters the suction manifold then flows into the compression cylinder where it gets compressed by a piston driven in a reciprocating motion via a crankshaft and is then discharged.
Various compressors are found in almost every industrial facility.
Reciprocating air compressor is a positive displacement air compressor in which air is sucked in a chamber and compressed with the help of a reciprocating piston.