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We have the right product for every application.

As a leading compressed air technology system provider, we supply not just standard products but customised, individual solutions too.

VARIABLE series screw compressor – energy saving of up to 35% using SCD technology

Performance class: 16 – 355 kW

Variable compressors for maximum cost-effectiveness

  • Intelligent SCD technology
  • Speed control
  • Direct drive
  • Stepless mains pressure of 5-13 bar

The speed-controlled screw compressors of the VARIABLE series have been developed with the latest knowledge drawn from research and technology for applications with variable compressed air requirements.

Market analyses show that on average compressors only have a utilisation rate of around 50–70 %. The maximum delivery volume is, however, only needed during peak times. So we developed ALMiG SCD technology, the benefits of which come to the fore in partial load applications - i.e. exactly where they are needed.
SCD technology stands for Speed Controlled and Direct drive and is an integral drive concept with maximum cost-effectiveness. An energy saving of up to 35 % can be achieved through:

  • Speed control
  • Constant mains pressure, stepless from 5 - 13 bar
  • Extremely good system efficiency
  • No start-up changeover power peaks
  • No expensive idle times

The VARIABLE series is available in 4 different variants with volume flows of between 1.17 – 55.55 m³/min:

  1. Separation system
    • Outstanding compressed air quality from proven multi-stage separation
  2. SCD frequency converter
    • The integrated power pack; EMC guidelines met of course
  3. SCD motor
    • Highly efficient drive motor, IP 55 protection class, optimum efficiency of up to 96 %
  4. Direct drive
    • Zero-loss power transfer (no v-belt, pure operation)
  5. Compressor
    • High-performance, excellent efficiency over the entire control range
  6. Cooling unit
    • Large cooler for minimum compressed air outlet temperatures and optimum thermostat-controlled coolant temperatures
  7. Fan
    • Powerful
    • Efficient
    • High-performance
  8. Air Control
    • The intelligence of the compressor: it thinks, monitors, documents. Can be connected to the Internet, making all conceivable communication possible.

Potential for saving energy

The measurement diagrams below contain a huge potential for saving energy! We only base our decisions on facts. Which is why we analyse first, then make a decision.
ALMiGspecialists will therefore use a precise consumption measurement procedure to determine your current compressed air consumption and work with you to develop an ideal system solution.

The directly driven, speed-controlled VARIABLE coupled with the screw compressors of the DIRECT series make for an unbeatable energy-saving duo .

* V relates to an operating overpressure of 7 bar at 50 Hz / 100 psig at 60 Hz Systems are air-cooled as standard / water-cooled as an option As of VARIABLE 35 model (VARIABLE 35 / 51), as of VARIABLE 315 model (VARIABLE 315 / 430), only water-cooled system available

Heat recovery systems available for all models

For more information about the ALMiG screw compressors of the VARIABLE series, please download the following brochure in your desired language.

DE - Screw compressor brochure VARIABLE

EN - Screw compressor brochure VARIABLE

ES - Screw compressor brochure VARIABLE

FR - Screw compressor brochure VARIABLE

* "PLUS" variant with coupled compressed air refrigeration dryer, can also be retrofitted
"O" variant with coupled compressed air refrigeration dryer and filter system comprising 1x depth filter
and 2x active carbon filter for generating technically oil-free compressed air