Description
The OS.A series is the open-drive screw compressor series for use in industrial ammonia applications. The series combines a high refrigerating capacity with proven reliability and outstanding energy efficiency in full and part load.
Refrigerants
- Natural low-GWP refrigerant
- R717 (NH₃)
Product range
- Three families: OS.A53, OS.A74 and OS.A85
- 11 sizes: 84 … 535 m³/h at 2,900 rpm
Certifications
- CE
- EAC
- DNV
Applications
- Refrigerated MT and LT storage
- Blast chilling/freezing systems
- Process and A/C liquid chillers
- Ice production
- Ice rinks
Highlights
- Industry-leading efficiency in full and part load operation
- Easy parallel compounding for increased system capacity
Capacity regulation
- Mechatronic capacity control
- Easy control via flanged solenoid valves
- OS.A53 to OS.A74: Multistage capacity control (control pistons)
- OS.A85: Dual capacity control (single slider) for stepwise or alternatively stepless capacity control and Vᵢ adaption
- Suitable for VSD operation
- OS.A53: Speed range 1,450 … 4,500 rpm
- OS.A74 and OS.A85: Speed range 1,450 … 4,000 rpm
Product versions
- OSKA: MT and A/C applications
- OSNA: LT and MT applications
- OSHA: Higher condensing temperatures (heat pumps)
- OSKAB: LT stage in booster systems
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