The test set is for studying the two stage reciprocating air compressor characteristics.

For educational purpose, the two stages are separated and can be operated at different speeds. Both stages are connected by vee-belts to the same motor with an advanced inverter. The second stage compressor has three alternative pulleys to vary the pressure ratio between the two stages. An intercooler is provided between first and second stage. The air receiver has a drain valve, safety valve, pressure switches and a discharge valve. The piping system is arranged such that intercooler or second stage compressor can be by passed. The unit is equipped with necessary measuring instruments and is on wheels.

Instruction manual is also included.

  • Compressor characteristics e.g. volumetric efficiency, isothermal efficiency, pressure ratio, temperature ratio.
  • Effect of compressor speed.
  • Effect of intercooler.
  • Effect of second stage drive ratio.
  • Effect of inter cooling.
  • Air water heat exchanger demonstration.
 - Type Air-cooled, two stage
 - Displacement 300 ml. or approximate equal
 - Second stage Single cylinder, completed with three different diameter pulleys
 - Maximum working pressure 12 kg/cm2
Air receiver Approx. 90 L or as requested
Intercooler Water cooled, counter flow heat exchanger
Measuring instruments
 - Pressures Pressure gauges at first stage and second stage outlets, and air receiver
 - Air flow rate Inlet orifice plate with air box and inclined water manometer, 0-450 mm x 1 mm
graduation, multiple slope 1:10, 1:5, 1:2 and 1:1
 - Motor input power Advanced inverter
 - Sensors with digital display
  • Speed for compressors
  • Temperature for ambient, outlet air of each stage, second stage inlet and cooling water inlet and outlet
Accessory Barometer
Power supply 220V, 1 Ph, 50 Hz. Other power supply is available on request.
Part No. Part Name
MP 100-011 Differential pressure digital display.
MP 200-030 P-V diagram set consisting of pressure sensor with signal converter and software for demonstration of the diagram on computer.
MP 201-002A Motor dynamometer with an inverter torque and speed digital display instead of advanced inverter for measurement of TRUE input power.
MP 203-002A Two separate motors (first stage 1.5 kW second stage 0.75 kW) with advanced inverters for variable speed ratio between the first and the second stage instead of single motor and advanced inverter.
MP 203-020 Additional receiver tank.
MP 203-050

Computer Interface

Sensors with computer interface unit for key data
acquisition instead of analog data measuring

This includes computer interface unit with pressure sensors and one differential pressure sensor instead of pressure gauges inclined manometer and rotameter.

MT 501-015A Air flow digital display instead of inlet air box and orifice plate.
Other accessories can be supplied on request.


Net (unassembled) Shipping Dimensions WxLxH 110 x 140 x 130 cm.
Net Weight Approx. 190 kg.