air compressor:

Advantages of multistage reciprocating air compressor:

Ø      It improves the volumetric efficiency for the give pressure ratio.

Ø      It reduces the leakage loss considerably.

Ø      It provides effective lubrication because of lower temperature range.

Ø      It reduces the cost of compression.

Comparison of reciprocating and rotary air compressor:

Serial No:	Reciprocating air compressor	Rotary air compressor
01	The maximum delivery pressure may be as high as 1000 bar.	The maximum delivery pressure may be as lower as 10 bars.
02	The maximum free air discharge is about 300 m3/min.	The maximum free air discharge is about 3000 m3/min.
03	They are suitable for low discharge at high pressure.	They are suitable for high discharge at low pressure.
04	The speed is low.	The speed is high.
05	The air supply is intermittent.	The air supply is continuous.
06	The balancing is a major problem.	There is no balancing problem.
07	The lubricating system is complicated.	The lubricating system is simple.
08	The air delivered is less clean.	The air delivered is cleaner.

Applications of compressed air:

Ø      For operating pneumatic drills, riveters and road drills.

Ø      For paint spraying.

Ø       In starting and supercharging of IC engines.

Ø      In gas turbine plants.

Ø      For combustion's of fuel.

Ø      For jet engines and air motors.