BOCK Transcritical CO₂ Compressors – HG CO₂ T
BOCK Transcritical CO₂ Compressors are designed for demanding CO₂ refrigeration applications across supermarkets, commercial and industrial refrigeration plants and heat pump systems. The HG CO₂ T range consists of gas-cooled, semi-hermetic reciprocating compressors engineered specifically for both transcritical and subcritical CO₂ applications.
With BOCK’s experience in transcritical CO₂ compressor technology dating back to 1993, the range combines specialist CO₂ engineering with high efficiency, reliable operation and long service life.
HG CO₂ T Compressor Performance
The BOCK Transcritical CO₂ Compressors range is specifically designed to meet the higher operating pressures associated with transcritical CO₂ refrigeration systems.
Key specifications include:
- Operating pressures up to 130 bar
- Standstill pressures of LP 100 bar / HP 150 bar
- Specific CO₂ design for high compressor and system efficiency
- Low oil carry-over for dependable operation
Efficient and Reliable CO₂ Refrigeration
Designed to minimise operating costs, these compressors combine high compressor efficiency with a robust, long-life design.
Special features include:
- Reliable and safe oil supply through pump lubrication
- Low oil throw-off
- Low vibration, pulsation and operating noise
- Broad application limits and a large frequency range
- Pressure relief valves for the suction and pressure areas
- Long-standing experience in transcritical CO₂ compressor technology
These characteristics make the HG CO₂ T range suitable for a wide variety of commercial and industrial CO₂ refrigeration and heat pump applications.
Important Information for CO₂ Applications
CO₂ applications require specialist system design and control and should not be considered a universal substitute for F-gases. The instructions for assembly and BOCK guidance regarding the handling of CO₂ compressors must always be followed. Technical information may also change as compressor technology continues to develop.
For applications requiring efficient, high-pressure CO₂ compressor technology, BOCK Transcritical CO₂ Compressors provide a proven solution for modern refrigeration and heat pump systems.
HG CO₂ T Range
HGX24 CO₂ T
HGX34 CO₂ T
HGX46 CO₂ T



