Atlas Copco's new 30-90 kW oil-injected screw compressors

Firstly, there is the GA 37-90 VSD models that deliver on average 35 per cent energy savings, while avoiding compressor idling time. There is also the premium efficiency fixed-speed Plus variant GA 30+-75+, with an IE3 motor, offering efficiency and best-in-class Free Air Delivery (FAD). Another option is the standard base-performing GA 37-90, which completes the range.

By focusing on improving the key components of the compressor, Atlas Copco engineers achieved large performance benefits. To start with, the GA's 'cool canopy' and single-ducting principle influence both performance and serviceability. Thanks to the improved component layout in the canopy, temperatures at the element outlet are down by 10degC (18degF). Atlas Copco also introduced IE3 premium efficiency motors, combined with highly efficient screw elements in all ranges.

The GA 37-90 VSD compressors are equipped with a Variable Speed Drive (VSD) motor, which matches the compressor's output to the actual demand. This way, the compressor is claimed to achieve on average 35 per cent energy savings and a life cycle cost reduction of up to 22 per cent. Other advantages to the VSD technology include: no idling times or blow-off losses, integrated compressor controls, and start-up under system pressure. VSD technology not only lowers energy consumption, it also offers wide operating ranges.

Whole-life sustainability is a major concern for Atlas Copco, and this translates into the use of sustainable components. The GA's integrated dryer makes use of R410A, an environmentally-friendly refrigerant that does not contribute to ozone depletion. This type of refrigerant also reduces the dryer's power consumption by 50 per cent. The integrated dryer is available as an option in all models.

The new GA is also a Workplace Air System that integrates anywhere in the factory and even close to the point of use, thanks to its low noise levels. Koen Lauwers, the Vice President of Marketing for Atlas Copco's Industrial Air Division, states: "Atlas Copco's customers expect highly reliable compressors and the new GA 30+ to 90 range delivers exactly that."

Reduced oil consumption and maintenance

Many small improvements to the oil treatment system result in up to 50 per cent less oil consumption and reduced maintenance. Thanks to the GA's integrated condensate treatment option, which is suitable for ISO 14001-certified companies, the compressor's condensate can safely be disposed into the sewage system. The GA's canopy is not only cool, it also draws in less conductive dust, thanks to the over-pressure in the electrical cubicle. This feature also helps to extend the life of the electrical components.

Efficiency is key in the new GA 30+ to 90 compressor range. By improving the key components in the compressor, milestones in performance, sustainability and reliability have been achieved, and the range promises an excellent FAD, low energy requirements and low element outlet temperatures in a cool, maintenance-friendly canopy.

Learn more about this new GA oil-injected screw compressor range at www.atlascopco.com/drivenbyefficiency.