OS.53-85 Series

OS.53-85 Series

The OS.53-85 series is the open-model screw compressor series for use with synthetic refrigerants. The series combines a high refrigerating capacity with proven reliability and outstanding energy efficiency in full and part load.

Refrigerants

Wide range of refrigerants
HFC, HFC blends, HCFC, non-flammable A1
HFO blends, non-flammable A1

Product range

Three families: OS.53, OS.74 and OS.85
12 sizes: 84 ... 535 m³/h at 2,900 rpm

Certifications

CE
EAC
DNV-GL

Applications

Refrigerated MT and LT storage
Blast chilling/freezing systems
Process and A/C liquid chillers
Ice production

Industry sectors

Food and beverages industry
Chemical and pharmaceutical industry
Leisure and sports industry
Marine and offshore industry

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Highlights

Industry-leading energy efficiency in full and part load operation
Easy parallel compounding for increased system capacity
Highly flexible and easy to service by separation of refrigerant circuit and motor
BITZER Global Service network for quick spare part availability all over the world

Capacity regulation

Mechanical capacity control
- Easy control via flanged solenoid valves
- OS.53 to OS.74: Multistage capacity control (control pistons)
- OS.85: Dual capacity control (single slider) for stepwise or alternatively stepless capacity control and Vᵢ adaption
Suitable for VSD operation
- OS.53: Speed range 1,450 ... 4,500 rpm
- OS.74 and OS.85: Speed range 1,450 ... 4,000 rpm

Product versions

OSK: MT and A/C applications
OSN: LT and MT applications
OSKB: 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 by 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

System-related accessories

Primary and secondary oil separators:
- Oil separators: OA series
- Secondary oil separators: OAF series
Oil coolers
- Air cooled oil coolers: OL series
- Water cooled oil coolers: OW series
Liquid receivers
- Horizontal liquid receivers: F series
- Vertical liquid receivers: FS series

Features
Highlights
- Industry-leading energy efficiency in full and part load operation
- Easy parallel compounding for increased system capacity
- Highly flexible and easy to service by separation of refrigerant circuit and motor
- BITZER Global Service network for quick spare part availability all over the world
Capacity regulation
- Mechanical capacity control
  - Easy control via flanged solenoid valves
  - OS.53 to OS.74: Multistage capacity control (control pistons)
  - OS.85: Dual capacity control (single slider) for stepwise or alternatively stepless capacity control and Vᵢ adaption
- Suitable for VSD operation
  - OS.53: Speed range 1,450 ... 4,500 rpm
  - OS.74 and OS.85: Speed range 1,450 ... 4,000 rpm
Product versions
- OSK: MT and A/C applications
- OSN: LT and MT applications
- OSKB: 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 by 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
System-related accessories
- Primary and secondary oil separators:
  - Oil separators: OA series
  - Secondary oil separators: OAF series
- Oil coolers
  - Air cooled oil coolers: OL series
  - Water cooled oil coolers: OW series
- Liquid receivers
  - Horizontal liquid receivers: F series
  - Vertical liquid receivers: FS series