Screw Compressors
With the GEA CompaX you can simply have it all: A minimized leakage risk for safe air conditioning as well as an ammonia solution for maximum plant efficiency and a clean environment.
At GEA Heating & Refrigeration Technologies we aim to increase the attractivity and awareness of the natural refrigerant ammonia and to ease the usage of ammonia-based solutions. For this purpose, the semi-hermetic screw compressor CompaX was developed.
The GEA CompaX operates without a shaft seal and reduces leakage risk to a minimum. Thanks to low vibration and sound level the compressor is ideal for usages in close proximity to populated areas. In addition, the product benefits based on more than 50 years of screw compressor development open new possibilities for sophisticated refrigeration systems with ammonia as one of the most efficient refrigerants.
The two GEA CompaX models 350 and 400 have a flow volume of 321 and 372 m³/h (at 2,940 rpm). By using a speed of up to 6,000 rpm and the possibility of a multi-compressor arrangement these two compressor sizes are suited for small, medium and also larger capacity requirements. They combine best efficiencies by using the natural refrigerant ammonia, a wide, stepless adjustable, variable internal volume ratio and a wide speed range as well as highest safety and reliability through decades of experience in developing screw compressors. The compact design and the simultaneously high degree of integration also make the GEA CompaX a cost-efficient and space-saving product.
The semi-hermetic GEA CompaX range offers highly efficient, reliable and low-maintenance solutions for many cooling applications.
GEA RT Select – our selection and configuration program will help you to find the right equipment for your refrigeration and heating plant.
| Model | Swept volume flow at
50 Hz / 100/87 Hz1) | Cooling capacity
at max. Hz | Dimensions (mm) | Suction
side (mm) | Discharge
side (mm) | Weight | ||
| m³/h | kW
R717, 0/+30 °C | L | W | H | kg | |||
| GEA CompaX 350 | 321/642 | 630 | 1,434 | 797 | 656 | DN125 | DN80 | 789 |
| GEA CompaX 400 | 372/744 | 745 | 1,463 | 797 | 656 | DN125 | DN80 | 807 |


The GEA Grasso M series comes in eight sizes with a swept volume ranging from 231 to 870 m³/h / 136 to 512 cfm (at 2,940 rpm).

GEA BluX is among the world‘s first ammonia chillers with a semi-hermetic compact screw compressor, developed as an environmentally friendly solution in line with the global trend towards a greener future through the use of natural refrigerants.

The GEA Grasso LT series comes in sixteen sizes and covers a swept volume from 805 to 11,467 m³/h / 474 to 6,749 cfm.
Since 2019, GEA has risen from underperformer to DAX member – one of Germany's top 40 listed companies – by fostering entrepreneurship and turning sustainability into a competitive advantage. It reached this milestone in its nearly 145-year history without tailwinds or shortcuts, in a world of compounding crises. This turnaround shows what's possible when purpose and performance align.
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