Screw Compressor OSKAB - OSKAB8561-K (NH3)
OSK = Application for air-conditioning and medium temperature cooling
BITZER’s open screw compressors for use with NH₃ have been proving their worth on the market for many years. We offer these robust and efficient solutions for use on their own and in parallel operation with several compressors and a shared oil separator. The combination of open compressor and external standard motors makes the series exceptionally flexible and allows operation at different supply voltages. BITZER has the appropriate couplings and coupling housing as accessories in its portfolio, making it safe and easy to combine compressors with external standard motors. A significant improvement: the refrigerant circuit and electrical drive are separate, making maintenance and repair much simpler. To complement the open OS.A screw compressors, we’ve developed a complete portfolio of tried-and-tested accessories for use in large-scale commercial and industrial NH₃ refrigeration and air conditioning systems.
The OS.A95103 compressor marks the beginning of the new OS.95 series. The strengths of this new development include large volume flows up to 1,015 m³/h at 2,900 revolutions per minute, integrated control electronics, an optimised slider concept for seamlessly adjustable capacity control and Vi adjustment for maximum efficiency at every operating point.
- High system output
- Optimal capacity adjustment and minimal energy requirements under full- and part-load
- Combination of various compressor sizes
| Displacement | Allowed speed range | Sens of rotation (compressor) | Weight | Max. pressure (LP/HP) | Connection suction line | Connection suction line (NH3) | Connection discharge line | Connection discharge line (NH3) | Oil type NH3 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2900 RPM 50Hz | 3500 RPM 60Hz | ||||||||||
| SI | 359 m³/h | 433 m³/h | 1450 .. 4000 min-1 | rechts / clockwise | 370 kg | 19 / 28 bar | DN 100 | DN 100 | 76 mm - 3 1/8'' | DN 80 | Reniso KC68 , SHC 226E |
| IP | 12678 CFH | 15291 CFH | 1450 .. 4000 min-1 | rechts / clockwise | 816 lb | 275 / 400 psi | DN 100 | DN 100 | 76 mm - 3 1/8'' | DN 80 | Reniso KC68 , SHC 226E |
Extent of delivery (Standard)
| Type | Suction shut-off valve | Pressure relief valve | Check valve | Oil injection kit | Built in oil filter | discharge gas temperature monitoring | Discharge gas temperature sensor | Protective charge |
|---|---|---|---|---|---|---|---|---|
| SI | Standard | Standard | Standard | Standard | Standard | SE-B2 | Standard | Standard |
| IP | Standard | Standard | Standard | Standard | Standard | SE-B2 | Standard | Standard |
Available Options
| Type | Oil flow control | Discharge shut-off valve | Coupling housing | Start unloading | Capacity control |
|---|---|---|---|---|---|
| SI | Option | Option | Option | Standard | 100-75-50% or 100-50% (Standard) |
| IP | Option | Option | Option | Standard | 100-75-50% or 100-50% (Standard) |