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ePARTS
ePARTS makes finding the appropriate spare parts for our products fast and easy. The parts are listed according to the model range and appear as a simple zoomable expanded-view drawing. The software is free of charge. As a direct BITZER customer registered at myBITZER, you benefit from additional advanced features – for example, the ability to view online prices of individual spare parts.
ePARTS makes finding the appropriate spare parts for our products fast and easy. The parts are listed according to the model range and appear as a simple zoomable expanded-view drawing. The software is free of charge. As a direct BITZER customer registered at myBITZER, you benefit from additional advanced features – for example, the ability to view online prices of individual spare parts.
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OS.A53-85 Series
On the notepadThe 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
Industry sectors
- Food and beverages industry
- Chemical and pharmaceutical industry
- Leisure and sports industry
- Marine and offshore industry
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
Reduced life cycle costs
- Very low operating costs due to outstanding high energy efficiency
- Long lifetime due to high robustness and low-vibration design
- Low maintenance costs due to service-friendly design
- BITZER Global Service network for quick spare part availability all over the world
Easy to apply
- Extensive documentation and BITZER know-how for technical support
- Wide range of matching accessories
- Easy calculation and selection via BITZER SOFTWARE
Reliability and flexibility
- All compressors are 100% factory-tested
- Integrated mechanical capacity regulation (CR) and start unloading (SU)
- Suitable for wide-range VSD operation
- Easy parallel operation of compressors due to internal discharge check valve
Compressor-related accessories
- Wide range of suction and discharge bushings and discharge gas shut-off valves
- Matching couplings and coupling housings
- Adaptor and shut-off valve for economiser connection
- OS.A85: IQ MODULE for simplified compressor control and monitoring
System-related accessories
- Primary and secondary oil separators
- Oil separators for NH₃: OA..A series
- Combined oil separators for NH₃: OAC series; OAHC series
- Secondary oil separators for NH₃: OAS series
- Oil coolers
- Water cooled oil coolers for NH₃: OW..A series
- Liquid receivers:
- Horizontal Liquid receivers for NH₃: F..A series
-
Features
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
-
Benefits
Reduced life cycle costs
- Very low operating costs due to outstanding high energy efficiency
- Long lifetime due to high robustness and low-vibration design
- Low maintenance costs due to service-friendly design
- BITZER Global Service network for quick spare part availability all over the world
Easy to apply
- Extensive documentation and BITZER know-how for technical support
- Wide range of matching accessories
- Easy calculation and selection via BITZER SOFTWARE
Reliability and flexibility
- All compressors are 100% factory-tested
- Integrated mechanical capacity regulation (CR) and start unloading (SU)
- Suitable for wide-range VSD operation
- Easy parallel operation of compressors due to internal discharge check valve
-
Accessories
Compressor-related accessories
- Wide range of suction and discharge bushings and discharge gas shut-off valves
- Matching couplings and coupling housings
- Adaptor and shut-off valve for economiser connection
- OS.A85: IQ MODULE for simplified compressor control and monitoring
System-related accessories
- Primary and secondary oil separators
- Oil separators for NH₃: OA..A series
- Combined oil separators for NH₃: OAC series; OAHC series
- Secondary oil separators for NH₃: OAS series
- Oil coolers
- Water cooled oil coolers for NH₃: OW..A series
- Liquid receivers:
- Horizontal Liquid receivers for NH₃: F..A series
Brochures*
Operating instructions*
*For further documentation please choose Product Type
Products
Technical Data TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data OPEN IN SOFTWARE TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
Technical Data TO DOCUMENTATION
* Displacement in m³/h at 2900/3500 rpm