In a single stage compressor the air is compressed one time.
3 stage air compressor diagram.
Next the air goes into an intermediate stage compressor during which it is heated as a natural byproduct.
The red wire from the 3 phase is only connected to the motor.
The compressor features an oil lubricated pump with three cast iron cylinders a 1 piece cast iron crankcase and 12 in cast iron flywheel.
We used a pressure switch by square d part number 9013 fhg12mix.
This minimizes the heat that has accumulated through the compression process and lets it get close to room temperature.
Reciprocating piston compressors use a cylinder to force air into a chamber where it is compressed.
We are using a 3 phase 240 volt system and hooking up to an air compressor.
While straightforward this setup is limited in its efficiency and capacity for delivering high volumes of pressurized air.
Fig shows various parts of three stage v type reciprocating air compressor with the receiver air tank.
Thus we have seen the actual operation of an air compressor and its theoretical p v diagram.
In a two stage compressor the air is compressed twice for double the pressure.
The black and blue wires from the 3 phase are connected to the pressure switch and then connected to the motor.
Various parts of reciprocating compressors.
But just cooling the compressed air delivered out of each stage to near atmospheric temperature leads to increased overall operating efficiency and overcomes plenty of mechanical problems associated with the compressor.
When the desired pressure in the air tank is reached it stops the motor and hence the compressor.
The simplest compressor designs feature a single cylinder chamber arrangement.
After 3 months the motor burnt out.
Single stage air compressor provides high air flow with has 14 scfm at 90 psi and 155 psi max working pressure giving the user optimum tool performance.
However given the same energy input the 3 stage compressor will output less compressed air than the equivalent sized 4 stage.
The trade off between 3 and 4 stage compressors is one of mechanical complexity vs energy efficiency.
3 stage vs 4 stage air compressors.
The compressed air at the pressure p2 volume v2 and temperature t2 is delivered out of the compressor to the air receiver.
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In my next article we will discuss the work done by and reasons for using multi stage air compressors.
In my last article we discussed the limitations of a single stage air compressor and the problems associated with it.
The pressure switch is connected to the electric motor.
