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The stages of compression are distributed on two separate machines. By variation of their speed it is possible to change the stage pressure relations within wide limits. Controlled inter- and after-water-cooling and cylinder air-cooling provides adjustment of all variations of performance. Indicating determines the internal work automatically.

Compressors:

1. Stage 2-cylinder compressor driven by frequency controlled electric engine with speed- and torque-measurement.
2. Stage 1-cylinder compressor driven by frequency controlled electric engine with speed- and torque-measurement. Equipped for indication.

The two compressors can be operated in single-, series- and parallel circuit.
Inter- and after-cooling with water is temperature controlled.
The vessel-pressure is controlled automatically.

Measuring systems :

The measuring devices are digitally connected to the internal controller, sending data to the comprised portable PC. Stand control and data acquisition is performed by Windows-software. Measured quantities are:

Temperatures
Volume flow-rate of cooling water
Torque and speed
Air-mass
Pressures
PID-based control of inter- and after-cooling. The controller's parameter can be set by the software.

Technical details:

Dimensions: 3m x 1.8m x 0.65m
Weight: 350 kg

Supplies:

400V 3-phase AC 2.5 kW, cooling water

Compressor 1 1450 ccm, 11,0kW Compressor 2 480 ccm, 7,5kW Vessel 500l

po-3	Air-pressures piezoresistive up to 16 bar absolute
to-10	Air- and water-temperature
VL1-2	Quantity of cylinder cooling air
VW1-2	Water-quantities for inter- and after-cooling
VK	Compressed air-mass
n1-2	Compressor speed
M1-2	Torques, strain gages
pi1-2	Internal cylinder pressures
d1-2	Piston displacement sensor

Piston compressor double stage HG004

The stages of compression are distributed on two separate machines. By variation of their speed it is possible to change the stage pressure relations within wide limits. Together with the controlled inter- and aftercooling all variations of performance can be adjusted. Indicating determines the internal work automatically.

Compressors:

1. Stage 2-cylinder compressor driven by two-speed motor with electric power measurement.
2. Stage 1-cylinder compressor driven by frequency controlled electric engine with speed- and torque-measurement. Equipped with indication device.

The two compressors can be operated in single-, series- and parallel circuit.
Inter- and after-cooling with water is temperature controlled.

Measuring systems:

The measuring devices are digitally connected to the internal controller, sending serial data to the comprised portable PC. Stand control and data acquisition is performed by Windows-software. Measured quantities are:

Temperatures
Volume flow of cooling water
Mechanical power calculated from the measured quantities torque and speed
Air-mass
Pressures
PID-based control of inter- and after-cooling. The controller's parameter can be set by software.

Technical details:

Dimensions: 3m x 1.8m x 0.65m
Weight: 350 kg

Supplies:

400V 3-phase AC 2.5 kW
Cooling-water

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Keywords: Air Compressor, Piston Compressor, Reciprocating Compressor, Double Stage Compressor, Compressorium, Indicating