Sustainable and future-proof cooling with RC gas coolers
01.07.2026
Legal requirements for refrigerants are changing – and we are taking early steps to provide a future-proof and sustainable solution.
The previous compressor gas coolers in the EGK series use the fluorinated refrigerant R134a (GWP 1450). Regulation (EU) 2024/573 significantly restricts the use of fluorinated refrigerants (F-gases) and provides for their gradual phase-out in the long term. In addition, a planned PFAS ban under the REACH Regulation could render the use of many fluorinated refrigerants entirely impossible in the future.
Our solution: the new RC series
Since 2025, we have been gradually converting our compressor gas coolers to the new RC series. This series uses the natural refrigerant R600a (isobutane) – an environmentally friendly and future-proof alternative with a Global Warming Potential (GWP) close to zero.
As part of this transition, you benefit not only from a regulation-compliant solution but also from targeted technical and digital enhancements.
Your advantages at a glance:
- Consistent or improved cooling performance
- Expanded options and updated electronics
- Future-proof system operation without fluorinated refrigerants
- Environmentally friendly due to significantly reduced CO₂ emissions (GWP close to zero)
- Modbus RTU interface for configuration and system integration
- Standard digital nameplate as a basis for Industry 4.0
Availability:
The new RC compressor gas coolers with R600a are available to order now.
The conversion of Ex coolers (EGK 2A Ex and EGK 1 Ex 2) will follow at a later date – we will inform you in good time. Naturally, existing systems using R134a can continue to be operated as usual.
With this transition, we actively support you in operating your systems in a sustainable, efficient and compliant manner. If you have any questions or would like individual advice, your contact person will be happy to assist you at any time.
Your Bühler Technologies Team
Overview:
Cooling capacity at 25 °C1) | Gas Paths | Previous product line | New product line |
| 360 kJ/h | 1-2 | EGK 2-19 EGK 2-19+ | RC 1.2 Rack RC 1.2+ Rack |
| 360 kJ/h | 1-2 | RC 1.1 RC 1.2+ | RC 1.1 RC 1.2+ |
| 860 kJ/h | 1-42) | EGK 4S | RC 2.4 Rack |
| 1350 kJ/h | 1 | EGK 10 | RC 3.1 |
1) Tambient 25°C and output dew point 5°C.
2) Up to 8 gas paths available on request.