Screw Compressor OSN - OSN7461-K
OSN = Application for low temperature cooling
Over a period of many years, BITZER’s open screw compressors have established a reputation as a robust and efficient market solution. They’re used 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 entire series exceptionally flexible and facilitates operation at different supply voltages. With the corresponding accessories such as couplings and coupling housing, BITZER ensures a simple and secure connection between compressor and external standard motor. Another advantage is that the refrigerant circuit and electrical drive are separate, which simplifies maintenance and repair, promoting utilisation in many special applications in particular, including in the chemistry and pharmaceutical industries, and resulting in the use of OS screw compressors on ships.
- High system output
- Optimal capacity adjustment and minimal energy requirements under full- and part-load
- Combination of various compressor sizes
- Large bearings
- Coupling and coupling housing for direct drive with IEC motors
| Type | 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 R22 | Oil type R134a/R404A/R507A/R407A/R407F | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2900 RPM 50Hz | 3500 RPM 60Hz | |||||||||||
| SI | 220 m³/h | 266 m³/h | 1450 .. 4000 min-1 | links / counter-clockwise | 176 kg | 19 / 28 bar | 76 mm - 3 1/8'' | DN 80 | 54 mm - 2 1/8'' | DN 50 | B150SH, B100 (Option) | BSE170 (Option) |
| IP | 7740 CFH | 9420 CFH | 1450 .. 4000 min-1 | links / counter-clockwise | 388 lb | 275 / 400 psi | 76 mm - 3 1/8'' | DN 80 | 54 mm - 2 1/8'' | DN 50 | B150SH, B100 (Option) | BSE170 (Option) |
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 | Sight glass | Protective charge |
|---|---|---|---|---|---|---|---|---|---|
| SI | Standard | Standard | Standard | Standard | Standard | SE-B2 | Standard | Standard | Standard |
| IP | Standard | Standard | Standard | Standard | Standard | SE-B2 | Standard | Standard | Standard |
Available Options
| Type | Oil flow control | Discharge shut-off valve | ECO connection with shut-off valve | Adapter/shut-off valve for ECO | Coupling housing | Start unloading | Capacity control |
|---|---|---|---|---|---|---|---|
| SI | Option | Option | Option | 22 mm - 7/8'' (Option) | Option | Options | 100-75-50% (Standard) |
| IP | Option | Option | Option | 22 mm - 7/8'' (Option) | Option | Options | 100-75-50% (Standard) |