Screw compressors
Screw Compressors Comparg AV-Series are designed for smooth and economical production of compressed air.
Air flow rate 4,0 — 14,3 m3/min.
Pressure range 5,0 — 10,0 bar.
Comprag's products are sold in
more than 50 countries worldwide
via a professional distribution network.

Products application information
01. Compressed air producing
Screw Compressors A-Series
Screw Compressors AV-Series
Capacity to 5,9 m3/min
Capacity to 8,7 m3/min
Capacity to 14,3 m3/min
02. Compressed air preparation
Refrigerated dryers RDX
Adsorption dryers ADX
Adsorption dryers ADX-F-PDP
Air Filters for compressed air lines AF
Cyclone Separators for compressed air lines AS
Portable moisture extraction systems MEX
Portable compressed air aftercoolers ACP/ACE
Portable high volume coalescent filters CK
03. Compressed air storage
Air Receivers RV
04. Moisture management
Timed Solenoid Drain Valve TD
Mechanical Float Drain Valve FD
Process Water/Oil Separator WOS
05. Special products
Lubricant for Screw Compressors ScrewLub
Dew point sensor
Screw Compressors Comparg AV-Series with capacity to 8,7 m3/min
Screw Compressors Comparg AV-Series with capacity to 8,7 m3/min

Comparg AV-Series oil filled screw compressors are designed for smooth and economical production of compressed air in industrial plants.They feature a compact logically laid-out design, high quality materials and workmanship, and key components from leading manufacturers.

Functional characteristics

  • Low operating cost
  • Only as much electrical energy is required as compressed air
  • No electrical energy consumption during idling
  • Constant system pressure
  • No loading/unloading modes
  • No pulsation and pressure drops
  • Low maximum system pressure
  • Less compressed-air leakage
  • Conserved electrical energy owing to no excess pressure in system
The optimal choice of parameters


The rotation speed of the helical screw rotor unit is selected on the basis of the specific optimal performance. All compressor components have been designed according to parameters chosen for optimal performance and low operating costs. Comparg A-Series offer some of the lowest specific production costs of compressed air.

Specific power requirement (kW/m3)
Airend rotation speed (rpm)
Optimum speed
AV-series frequency control

A plant's demand for compressed air varies throughout the day - from zero demand to peak demand.

Conventional screw compressors are not able to switch between operating modes according to a plant's current demand for compressed air. Owing to constant switching between loading/unloading modes or the idle running of compressors, conventional screw compressors consume consistently large amounts of electrical energy when operating.

The Comprag AV compressor series with frequency control has been created for economical compressor operation where there is varying demand.

AV compressors are provided with a frequency converter for continuous control of compressor output according to the current demand for compressed air. They provide a plant with the necessary amount of compressed air at a given moment and at a constant set pressure, while consuming only as much electrical energy as there is demand for compressed air. This mode of operation conserves as much energy as possible.

Comprag compressors with frequency control allow a 25% saving in electrical energy consumption.

Mechanism of compressor with frequency control:

Varying compressed-air demand involves a change in pressure in a plant's compressed-air system. A pressure sensor installed in the compressor brings about a change in system pressure by means of a corresponding signal sent to the compressor's controller. Via the frequency converter, the controller sets a speed for the electric motor to match the compressor's required output. In this way, the plant's compressed-air system pressure is kept at a constant value.

The frequency converter means that compressor start-up is associated with very low starting currents. This has a positive effect on the service life of the electrical motor and the electrics.

Catalog AV-Series 45 - 55 źĀņ (6880 kB, Pdf document) - Download
User Manual AV-Series 45 - 55 źĀņ (8352 kB, Pdf document) - Download

Table of models

Article Model Drive power (kW) Working pressure (bar) Max. capacity* (m3/min) Rated voltage (Phase/V/Hz) Sound pressure level** dB(A) Screw connection
11100084 AV4508 45 5-8 7,00 3/380/50 75 1 1/2"
11100085 AV4510 5-10 6,20
11100094 AV5508 55 5-8 8,70 3/380/50 75 1 1/2"
11100095 AV5510 5-10 7,70

* Measured according to ISO 1217
** Measured according to ISO 3744

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