High-efficiency screw compressors for refrigeration, air conditioning, and heat pumps
BITZER screw compressors provide reliable and efficient compression for refrigeration, air conditioning, and heat pump applications across a wide capacity range. Available as open, semi-hermetic, and hermetic compressors, they enable precise system design for different performance requirements.
With integrated capacity control and optional speed control via a frequency inverter, BITZER compressors ensure stable operation and high efficiency, even at part load. This improves system performance, reduces energy consumption, and supports long-term operational reliability.
Optimized designs for natural refrigerants such as CO₂ (R744), NH₃ (R717), and hydrocarbons as well as low-GWP HFO refrigerants, enable future-proof refrigeration systems that comply with regulatory requirements and sustainability targets.
Screw Compressors for Hydrocarbons
Screw compressors for hydrocarbons are designed for safe and efficient operation in systems using natural refrigerants such as propane (R290), propene (R1270), and isobutane (R600a). They are halogen-free and are considered future-proof refrigerants with very low GWP. Thanks to their excellent thermodynamic properties, they are suitable for numerous applications.
BITZER screw compressors for hydrocarbons contribute to efficient and safe operation. Optimised series are available for process cooling and heat pumps. Due to enhanced tightness in accordance with EN1127-1, no ATEX zone needs to be assumed around the component. Wide application limits enable a high degree of flexibility, including in:
- Process cooling
- Air conditioning
- Data center cooling
- Heat pumps
Displacement at 50 Hz:
- Semi-hermetic screw compressors: 192 to 535 m³/h
- Compact screw compressors: 137 to 1120 m³/h
semi-hermetic for potentially explosive atmospheres (ATEX)
CS PRO EX Series Compact Screw Compressors for Hydrocarbons
Screw compressors for NH₃ / ammonia (R717)
Screw compressors for ammonia (R717) are the preferred solution for industrial refrigeration and large-scale systems requiring high efficiency and reliability.
The refrigerant ammonia has no ozone depletion potential and no direct greenhouse effect, while also offering high efficiency.
BITZER open drive screw compressors for NH₃ set the standard for technical innovation, versatility, and efficiency. They are suitable for use as single compressors and in parallel compounding in demanding applications such as:
- Commercial refrigeration
- Industrial refrigeration
- Marine operation
Displacement at 2,900/min
- 84 to 2,000 m3/h
open-drive compressors for potentially explosive atmospheres (ATEX)
OS.A-EX Series Screw Compressors for NH3/Ammonia (R717)
Screw compressors for HFC/HFO
BITZER screw compressors for HFC and HFO refrigerants support a wide range of applications using low-GWP refrigerants, combining flexibility, efficiency, and future-proof system design.
Finely tuned capacity control via mechanical capacity sliders or through speed control with a frequency inverter ensures high efficiency even at part load. With electronic components and economizer operation, systems can be further optimized. Important application ranges include:
- Liquid chillers
- Air conditioning
- Process cooling and process heating
- Heat pumps, for example, for district heating
- Marine operation
Displacement:
- Semi-hermetic screw compressors: 84 to 1,015 m³/h at 50 Hz
- Compact screw compressors: 137 to 2,000 m³/h at 50 Hz
- Compact screw compressors with integrated frequency inverter: 464 to 1,206 m³/h at maximum speed
- Open drive screw compressors: 84 to 535 m³/h at 2,900/min
semi-hermetic for potentially explosive atmospheres (ATEX)
CHS.EX Series Compact Screw Compressors for hFCs/HFOs
open-drive compressors for potentially explosive atmospheres (ATEX)