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- Rotary screw compressors
- Rotary screw compressors from 100 to 700 hp

Our oil-injected rotary screw compressors from the DSD to HSD series demonstrate their strengths above all in large-scale industrial operations. When large volumes of compressed air are required for your production processes with high levels of energy efficiency and dependability, then rotary screw compressors up to 700 hp are the perfect choice.

The DSD series is optionally available with an add-on dryer, which protects your compressed air lines from corrosion and minimizes the risk of damage to the product.

All models are available with or without variable-speed drive (SFC).

On the HSD series, two compressors are integrated within a single housing. Both units are equipped complete with airend, SIGMA CONTROL controller and individual cooling system. Due to their high flow rates, they are particularly well suited to applications in the automotive or steel industries.

**Your benefits**

**Service-friendly design:**

Every system is designed for easy access to all service- and maintenance-relevant parts from the front side of the unit, which saves time and increases availability.**Integrated controller for greater efficiency:**

The internal SIGMA CONTROL 2 controller precisely matches the power output of a compressor to the respective compressed air demand, thereby coordinating and optimizing the interplay between compressed air generation and consumption.**Maximum flexibility with minimal space requirement:**

With the HSD series, two compressors combined within a single enclosure save considerable space as compared to a single compressor unit with the corresponding performance. This system can be optimally adapted to different consumption scenarios, thereby minimizing idling periods and increasing efficiency.

We can help you optimize your compressed air installation. Contact us for a quote or to talk to a Kaeser representative about our products

Save energy with heat recovery

A rotary screw compressor converts 100% of the supplied electrical drive energy into heat. Up to 96% of this energy can be recovered and reused for heating purposes. This not only reduces primary energy consumption, but also improves the company’s overall energy balance.

You can find out everything regarding areas of application and potential savings on our heat recovery page.

Efficient and reliable operation

The integrated SIGMA CONTROL 2 controller coordinates compressed air generation and ensures efficient, reliable machine operation. Moreover, it guarantees perfect interaction within the integrated system as a whole. All relevant components and operating states are monitored and evaluated. A multitude of communications functions are available to the operator, including the option of connecting the machine to other control technology (SCADA).

Energy efficiency is paramount

The purchase price and service costs account for just a fraction of the total lifetime cost of a compressor. Energy accounts for the lion's share of the system’s costs. As a leading compressed air systems provider, we offer individual planning tailored to your exact needs, an energy-efficient compressed air station and reliable service. We are there to partner you throughout the entire service life of your compressed air station.

Functional diagram - HSD

- Air filter
- Inlet valve
- Electric motor
- Rotary screw airend
- Separator with cartridge

- Fluid filter
- Fluid cooler
- Aftercooler
- Centrifugal separator
- ECO-DRAIN condensate drain

The air for compression passes through the intake filter (1) and the inlet valve (2) into the SIGMA PROFILE airend (3). The compressor airend (3) is driven by a high efficiency electric motor (4). The cooling oil injected for cooling purposes during the compression process is re-separated from the air in the fluid separator tank (5). The compressed air flows through the 2-stage oil separator cartridge (6) and the minimum pressure check valve (MDRV) (7) into the compressed air aftercooler (8).

After cooling, any accumulating condensate is removed from the compressed air by the integrated centrifugal separator (9) and is then drained away from the machine via the installed ECO-DRAIN (10) condensate drain. The condensate-free compressed air then leaves the system at the compressed air connection (11). The heat generated during the compression process is then removed from the cooling oil via the fluid cooler (12) with water heat exchanger. The cooling oil is then cleaned by the ECO fluid filter (13). The Electronic Thermal Management (ETM) system (14) ensures lowest possible operating temperatures. The control cabinet houses the internal SIGMA CONTROL 2 compressor controller and, depending on the design, the star-delta starter or the frequency converter (SFC).

Technical specifications DSD

Model | DSD 145 | DSD 175 | DSD 205 | |||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 7.5 | 10 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 14 | 16.92 | 13.6 | 21 | 16.59 | 13.06 |

Max. positive pressure bar | 9 | 8.5 | 12 | 8.5 | 12 | 15 |

Nominal motor output kW | 75 | 90 | 110 | |||

Dimensions
W x D x H mm | 2,450 x 1,730 x 2,150 | 2,450 x 1,730 x 2,150 | 2,450 x 1,730 x 2,150 | |||

Compressed air connection | DN65 PN16 DIN | DN65 PN16 DIN | DN65 PN16 DIN | |||

Sound pressure level dB(A) | 69 | 70 | 72 | |||

Weight kg | 2,950 | 3,060 | 3,090 | 3,360 | 3,100 | 3,130 |

Model | DSD 240 | ||
---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 25.15 | 20.4 | 16.15 |

Max. positive pressure bar | 8.5 | 12 | 15 |

Nominal motor output kW | 132 | ||

Dimensions
W x D x H mm | 2,450 x 1,730 x 2,150 | ||

Compressed air connection | DN65 PN16 DIN | ||

Sound pressure level dB(A) | 74 | ||

Weight kg | 3,420 | 3,430 | 3,170 |

Model | DSD 145 T | DSD 175 T | DSD 205 T | |||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 7.5 | 10 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 14 | 16.92 | 13.6 | 21 | 16.59 | 13.06 |

Max. positive pressure bar | 9 | 8.5 | 12 | 8.5 | 12 | 15 |

Nominal motor output kW | 75 | 90 | 110 | |||

Refrigerated dryer | ABT 250 | ABT 250 | ABT 250 | |||

Dimensions
W x D x H mm | 2,750 x 1,730 x 2,150 | 2,750 x 1,730 x 2,150 | 2,750 x 1,730 x 2,150 | |||

Compressed air connection | DN65 PN16 DIN | DN65 PN16 DIN | DN65 PN16 DIN | |||

Sound pressure level dB(A) | 69 | 70 | 72 | |||

Weight kg | 3,220 | 3,330 | 3,360 | 3,630 | 3,370 | 3,400 |

Model | DSD 240 T | ||
---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 25.15 | 20.4 | 16.15 |

Max. positive pressure bar | 8.5 | 12 | 15 |

Nominal motor output kW | 132 | ||

Refrigerated dryer | ABT 250 | ||

Dimensions
W x D x H mm | 2,750 x 1,730 x 2,150 | ||

Compressed air connection | DN65 PN16 DIN | ||

Sound pressure level dB(A) | 74 | ||

Weight kg | 3,690 | 3,700 | 3,440 |

Model | DSD 145 SFC | DSD 175 SFC | DSD 205 SFC | |||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 7.5 | 10 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 3.67 - 15.73 | 3.67 - 18.43 | 3.5 - 15.6 | 4.45 - 21.22 | 4.2 - 18.3 | 4.97 - 15.16 |

Max. positive pressure bar | 8.5 | 10 | 10 | 15 | ||

Nominal motor output kW | 75 | 90 | 110 | |||

Dimensions
W x D x H mm | 2,690 x 1,730 x 2,150 | 2,690 x 1,730 x 2,150 | 2,690 x 1,730 x 2,150 | |||

Compressed air connection | DN65 PN16 DIN | DN65 PN16 DIN | DN65 PN16 DIN | |||

Sound pressure level dB(A) | 70 | 71 | 73 | |||

Weight kg | 3,190 | 3,330 | 3,340 | 3,370 |

Model | DSD 240 SFC | ||
---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 5.57 - 23.47 | 5.33 - 20.08 | 4.96 - 16.57 |

Max. positive pressure bar | 8.5 | 12 | 15 |

Nominal motor output kW | 132 | ||

Dimensions
W x D x H mm | 2,690 x 1,730 x 2,150 | ||

Compressed air connection | DN65 PN16 DIN | ||

Sound pressure level dB(A) | 75 | ||

Weight kg | 3,670 | 3,410 | 3,440 |

Model | DSD 145 T SFC | DSD 175 T SFC | DSD 205 T SFC | |||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 7.5 | 10 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 3.67 - 15.73 | 3.67 - 18.43 | 3.5 - 15.6 | 4.45 - 21.22 | 4.2 - 18.3 | 4.97 - 15.16 |

Max. positive pressure bar | 8.5 | 10 | 10 | 15 | ||

Nominal motor output kW | 75 | 90 | 110 | |||

Refrigerated dryer | ABT 250 | ABT 250 | ABT 250 | |||

Dimensions
W x D x H mm | 2,990 x 1,730 x 2,150 | 2,990 x 1,730 x 2,150 | 2,990 x 1,730 x 2,150 | |||

Compressed air connection | DN65 PN16 DIN | DN65 PN16 DIN | DN65 PN16 DIN | |||

Sound pressure level dB(A) | 70 | 71 | 73 | |||

Weight kg | 3,470 | 3,610 | 3,620 | 3,650 |

Model | DSD 240 T SFC | ||
---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 5.57 - 23.47 | 5.33 - 20.08 | 4.96 - 16.57 |

Max. positive pressure bar | 8.5 | 12 | 15 |

Nominal motor output kW | 132 | ||

Refrigerated dryer | ABT 250 | ||

Dimensions
W x D x H mm | 2,990 x 1,730 x 2,150 | ||

Compressed air connection | DN65 PN16 DIN | ||

Sound pressure level dB(A) | 75 | ||

Weight kg | 3,950 | 3,690 | 3,720 |

Model | ABT 250 |
---|---|

Power consumption kW | 1.8 |

Pressure dew point °C | 3 |

Refrigerant | R-513A |

Global warming potential | 631 |

Refrigerant volume kg | 1.35 |

Refrigerant mass as CO_{2} equivalent
t
| 0.9 |

Hermetic refrigeration circuit | - |

Technical specifications DSDX

Model | DSDX 245 | DSDX 305 | ||||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 25.15 | 20.4 | 16.15 | 30.55 | 24.7 | 19.78 |

Max. positive pressure bar | 8.5 | 12 | 15 | 8.5 | 12 | 15 |

Nominal motor output kW | 132 | 160 | ||||

Dimensions
W x D x H mm | 2,690 x 1,910 x 2,140 | 2,690 x 1,910 x 2,140 | ||||

Compressed air connection | DN80 PN16 DIN | DN80 PN16 DIN | ||||

Sound pressure level dB(A) | 74 | 75 | ||||

Weight kg | 3,950 | 3,962 | 3,716 | 4,450 | 4,018 | 4,030 |

Model | DSDX 245 SFC | DSDX 305 SFC | ||||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 5.57 - 27.17 | 5.57 - 23.35 | 4.95 - 19.27 | 6.85 - 33.03 | 5.35 - 28.46 | 5.18 - 24.01 |

Max. positive pressure bar | 8.5 | 12 | 15 | 8.5 | 12 | 15 |

Nominal motor output kW | 132 | 160 | ||||

Dimensions
W x D x H mm | 2,940 x 1,910 x 2,140 | 2,940 x 1,910 x 2,140 | ||||

Compressed air connection | DN80 PN16 DIN | DN80 PN16 DIN | ||||

Sound pressure level dB(A) | 75 | 76 | ||||

Weight kg | 4,700 | 4,454 | 4,466 | 4,800 | 4,812 | 4,566 |

Technical specifications ESD

Model | ESD 375 | ESD 445 | ||||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 37.85 | 30.13 | 24.34 | 42.2 | 37.32 | 29.67 |

Max. positive pressure bar | 8.5 | 12 | 15 | 8.5 | 12 | 15 |

Nominal motor output kW | 200 | 250 | ||||

Dimensions
W x D x H mm | 2,960 x 2,030 x 2,140 | 2,960 x 2,030 x 2,140 | ||||

Compressed air connection | DN100 PN16 DIN | DN100 PN16 DIN | ||||

Sound pressure level dB(A) | 75 | 76 | ||||

Weight kg | 5,000 | 4,880 | 4,560 | 5,060 | 4,940 |

Model | ESD 375 SFC | ESD 445 SFC | ||||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 8.6 - 37.6 | 8.22 - 32.51 | 6.4 - 27.48 | 10.6 - 43.2 | 8.33 - 37.89 | 7.77 - 31.94 |

Max. positive pressure bar | 8.5 | 12 | 15 | 8.5 | 12 | 15 |

Nominal motor output kW | 200 | 250 | ||||

Dimensions
W x D x H mm | 3,200 x 2,030 x 2,140 | 3,200 x 2,030 x 2,140 | ||||

Compressed air connection | DN100 PN16 DIN | DN100 PN16 DIN | ||||

Sound pressure level dB(A) | 76 | 77 | ||||

Weight kg | 5,480 | 5,160 | 5,170 | 5,660 | 5,540 | 5,220 |

Technical specifications FSD

Model | FSD 475 | FSD 575 | ||||
---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 48.2 | 37.63 | 29.52 | 58.4 | 47.57 | 37 |

Max. positive pressure bar | 8.5 | 12 | 15 | 8.5 | 12 | 15 |

Nominal motor output kW | 250 | 315 | ||||

Dimensions
W x D x H mm | 3,495 x 2,145 x 2,360 | 3,495 x 2,145 x 2,360 | ||||

Compressed air connection | DN150 PN16 DIN | DN150 PN16 DIN | ||||

Sound pressure level dB(A) | 79 | 79 | ||||

Weight kg | 6,580 | 6,230 | 6,100 | 6,750 | 6,600 | 6,250 |

Model | FSD 475 SFC | FSD 575 SFC | |||
---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 10.6 - 49.87 | 9.93 - 44.08 | 13.33 - 59.83 | 12.9 - 50.85 | 11.55 - 45 |

Max. positive pressure bar | 8.5 | 12 | 8.5 | 12 | 15 |

Nominal motor output kW | 250 | 315 | |||

Dimensions
W x D x H mm | 3,740 x 2,145 x 2,360 | 3,740 x 2,145 x 2,360 | |||

Compressed air connection | DN150 PN16 DIN | DN150 PN16 DIN | |||

Sound pressure level dB(A) | 79 | 80 | |||

Weight kg | 6,930 | 6,800 | 7,300 | 6,950 | 6,820 |

Technical specifications HSD

Model | HSD 662 | HSD 722 | HSD 782 | ||||||
---|---|---|---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 | 7.5 | 10 | 13 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 66.4 | 54.44 | 43.72 | 72.4 | 59.48 | 47.87 | 78.4 | 65.31 | 53.07 |

Max. positive pressure bar | 8.5 | 12 | 15 | 8.5 | 12 | 15 | 8.5 | 12 | 15 |

Nominal motor output kW | 360 | 400 | 450 | ||||||

Dimensions
W x D x H mm | 3,570 x 2,145 x 2,350 | 3,570 x 2,145 x 2,350 | 3,570 x 2,145 x 2,350 | ||||||

Compressed air connection | DN150 PN16 DIN | DN150 PN16 DIN | DN150 PN16 DIN | ||||||

Sound pressure level dB(A) | 71 | 72 | 72 | ||||||

Weight kg | 8,100 | 7,481 | 7,027 | 8,500 | 8,202 | 7,262 | 8,600 | 8,434 | 7,815 |

Model | HSD 842 | ||
---|---|---|---|

Working pressure bar | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 84.4 | 71.15 | 58.27 |

Max. positive pressure bar | 8.5 | 12 | 15 |

Nominal motor output kW | 500 | ||

Dimensions
W x D x H mm | 3,570 x 2,145 x 2,350 | ||

Compressed air connection | DN150 PN16 DIN | ||

Sound pressure level dB(A) | 73 | ||

Weight kg | 8,700 | 8,666 | 8,368 |

Model | HSD 662 SFC | HSD 782 SFC | HSD 842 SFC | |||||
---|---|---|---|---|---|---|---|---|

Working pressure bar | 7.5 | 10 | 7.5 | 10 | 13 | 7.5 | 10 | 13 |

Flow rate complete system at working pressure m³/min | 10.4 - 66.32 | 8.5 - 57.47 | 11.9 - 77.83 | 10 - 65.47 | 8 - 55.78 | 11.9 - 87.33 | 10 - 74.41 | 8 - 63.44 |

Max. positive pressure bar | 8.5 | 12 | 8.5 | 12 | 15 | 8.5 | 12 | 15 |

Nominal motor output kW | 382 | 410 | 515 | |||||

Dimensions
W x D x H mm | 4,370 x 2,145 x 2,350 | 4,370 x 2,145 x 2,350 | 4,370 x 2,145 x 2,350 | |||||

Compressed air connection | DN150 PN16 DIN | DN150 PN16 DIN | DN150 PN16 DIN | |||||

Sound pressure level dB(A) | 73 | 74 | 75 | |||||

Weight kg | 9,100 | 8,967 | 9,600 | 9,113 | 8,980 | 10,100 | 9,934 | 9,315 |

A great success!

Kaeser rotary screw compressors ensure reliable and energy-efficient production of giant steel tubes weighing tons at Vallourec.

Reference project: Vallourec