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- Products
- Reciprocating compressors
- Boosters
- N series

N-series boosters augment your existing system pressure in specific locations, elevating **it up to 45 bar**. Kaeser offers an **extensive range** of high-performance booster reciprocating compressors that work in perfect harmony with Kaeser rotary screw compressors and SIGMA PET AIR stations.

The N-series boosters are available **with one or two cylinders** and operate within the following performance parameters:

**Initial pressure up to 13 bar – discharge pressure up to 45 bar****Flow rate: 0.27 – 5.49 m³/min**

Compared to designing the entire compressed air supply system for higher pressure, the use of boosters is significantly **more cost-effective** for all applications that require **process air with a higher degree of compression ** than the normal control air and supply air at specific locations. **PET bottle production** is an excellent example of such applications.

**Your advantages**

**Continuous high-pressure operation:**

Innovative features such as oil pressure lubrication and intensified cylinder cooling ensure both long service life and low maintenance requirements as well as continuous system-compatible maximum pressure of 45 bar.**Exceptionally low oil requirement:**

The high quality cylinders are plateau-honed and feature an extra layer of wear protection. These details ensure low oil consumption over the entire service life.**For especially cool compressed air:**

The compressed air aftercoolers on the three-cylinder boosters are equipped with separate fans, which ensure low compressed air discharge temperatures. The boosters can be additionally equipped with water-cooled aftercoolers to attain even lower temperatures.

Energy cost savings

High-quality premium efficiency electric motors deliver unparalleled efficiency for remarkably low power consumption. Their low operating temperature provides an added advantage.

Versions

The smaller models in this range are best suited to applications where low flow rates are needed at pressures up to 40 bar. These compressors are equipped with one- or two-cylinder compressor blocks and are driven by high efficiency motors with up to 4 kW capacity. The quality of these units is second to none as all compressor blocks are designed, manufactured and assembled by KAESER.

When greater air flow rates are needed at pressures up to 45 bar then the mid-size and larger of the Kaeser booster models are the natural choice. At the heart of every one of these powerhouses is a precision machined two- or three-cylinder compressor block that delivers exceptional efficiency. Premium-efficiency electric drive motors up to 45 kW provide optimal energy efficiency (up to 18.5 kW: IE2, from 18.5 kW: IE3).

Sample layout

- Rotary screw compressor
- Air receivers
- Booster
- "High-pressure" air receiver
- "High-pressure" refrigeration dryer

- Pneumatic tools
- Low pressure network up to 13 bar
- Prefilter
- High-pressure microfilter
- Compressed air network at 45 bar

Compressed air system with booster up to 45 bar

Technical specifications N 60-G

Model | N 60 5/20 bar | N 60 7,5/30 bar | N 60 10/35 bar |
---|---|---|---|

Inlet pressure bar | 5 | 7.5 | 10 |

Outlet pressure bar | 20 | 30 | 35 |

Flow rate complete system at working pressure m³/min | 0.27 | 0.38 | 0.53 |

Compressor block / airend speed rpm | 1,150 | 1,150 | 1,150 |

Number of pistons — | 1 | 1 | 1 |

Nominal motor output kW | 2.2 | 2.2 | 2.2 |

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

Compressed air connection, inlet | G ½ | G ½ | G ½ |

Compressed air connection, outlet | G ½ | G ½ | G ½ |

Dimensions
W x D x H mm | 920 x 450 x 550 | 920 x 450 x 550 | 920 x 450 x 550 |

Weight kg | 70 | 70 | 70 |

Model | N 60 13/35 bar |
---|---|

Inlet pressure bar | 13 |

Outlet pressure bar | 35 |

Flow rate complete system at working pressure m³/min | 0.75 |

Compressor block / airend speed rpm | 1,150 |

Number of pistons — | 1 |

Nominal motor output kW | 2.2 |

Sound pressure level dB(A) | 74 |

Compressed air connection, inlet | G ½ |

Compressed air connection, outlet | G ½ |

Dimensions
W x D x H mm | 920 x 450 x 550 |

Weight kg | 70 |

Technical specifications N 153-G

Model | N 153 5/15 bar | N 153 5/20 bar | N 153 7,5/15 bar |
---|---|---|---|

Inlet pressure bar | 5 | 5 | 7.5 |

Outlet pressure bar | 15 | 20 | 15 |

Flow rate complete system at working pressure m³/min | 0.67 | 0.57 | 1.03 |

Compressor block / airend speed rpm | 650 | 650 | 650 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 2.2 | 4 | 2.2 |

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

Compressed air connection, inlet | G ¾ | G ¾ | G ¾ |

Compressed air connection, outlet | G ½ | G ½ | G ½ |

Dimensions
W x D x H mm | 1,390 x 720 x 820 | 1,390 x 720 x 820 | 1,390 x 720 x 820 |

Weight kg | 255 | 255 | 255 |

Model | N 153 10/15 bar | N 153 10/40 bar | N 153 13/40 bar |
---|---|---|---|

Inlet pressure bar | 10 | 10 | 13 |

Outlet pressure bar | 15 | 40 | 40 |

Flow rate complete system at working pressure m³/min | 1.4 | 0.89 | 1.33 |

Compressor block / airend speed rpm | 650 | 650 | 650 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 2.2 | 4 | 4 |

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

Compressed air connection, inlet | G ¾ | G ¾ | G ¾ |

Compressed air connection, outlet | G ½ | G ½ | G ½ |

Dimensions
W x D x H mm | 1,390 x 720 x 820 | 1,390 x 720 x 820 | 1,390 x 720 x 820 |

Weight kg | 255 | 255 | 255 |

Technical specifications N 253-G

Model | N 253 5/25 bar | N 253 7,5/20 bar | N 253 7,5/35 bar |
---|---|---|---|

Inlet pressure bar | 5 | 7.5 | 7.5 |

Outlet pressure bar | 25 | 20 | 35 |

Flow rate complete system at working pressure m³/min | 0.99 | 1.72 | 1.45 |

Compressor block / airend speed rpm | 1,135 | 1,135 | 1,135 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 7.5 | 7.5 | 11 |

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

Compressed air connection, inlet | G ¾ | G ¾ | G ¾ |

Compressed air connection, outlet | G ½ | G ½ | G ½ |

Dimensions
W x D x H mm | 1,390 x 730 x 810 | 1,390 x 730 x 810 | 1,390 x 730 x 810 |

Weight kg | 290 | 290 | 290 |

Model | N 253 10/25 bar | N 253 10/45 bar | N 253 13/25 bar |
---|---|---|---|

Inlet pressure bar | 10 | 10 | 13 |

Outlet pressure bar | 25 | 45 | 25 |

Flow rate complete system at working pressure m³/min | 2.27 | 1.91 | 3.05 |

Compressor block / airend speed rpm | 1,135 | 1,135 | 1,135 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 7.5 | 11 | 7.5 |

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

Compressed air connection, inlet | G ¾ | G ¾ | G ¾ |

Compressed air connection, outlet | G ½ | G ½ | G ½ |

Dimensions
W x D x H mm | 1,390 x 730 x 810 | 1,390 x 730 x 810 | 1,390 x 730 x 810 |

Weight kg | 290 | 290 | 290 |

Model | N 253 13/45 bar |
---|---|

Inlet pressure bar | 13 |

Outlet pressure bar | 45 |

Flow rate complete system at working pressure m³/min | 2.68 |

Compressor block / airend speed rpm | 1,135 |

Number of pistons — | 2 |

Nominal motor output kW | 11 |

Sound pressure level dB(A) | 76 |

Compressed air connection, inlet | G ¾ |

Compressed air connection, outlet | G ½ |

Dimensions
W x D x H mm | 1,390 x 730 x 810 |

Weight kg | 290 |

Technical specifications N 351-G

Model | N 351 5/25 bar | N 351 7,5/25 bar | N 351 7,5/35 bar |
---|---|---|---|

Inlet pressure bar | 5 | 7.5 | 7.5 |

Outlet pressure bar | 25 | 25 | 35 |

Flow rate complete system at working pressure m³/min | 1.58 | 2.53 | 2.31 |

Compressor block / airend speed rpm | 950 | 950 | 950 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 11 | 11 | 15 |

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

Compressed air connection, inlet | G ¾ | G ¾ | G ¾ |

Compressed air connection, outlet | G ¾ | G ¾ | G ¾ |

Dimensions
W x D x H mm | 1,550 x 880 x 1,020 | 1,550 x 880 x 1,020 | 1,550 x 880 x 1,020 |

Weight kg | 415 | 415 | 415 |

Model | N 351 10/25 bar | N 351 10/45 bar | N 351 13/25 bar |
---|---|---|---|

Inlet pressure bar | 10 | 10 | 13 |

Outlet pressure bar | 25 | 45 | 25 |

Flow rate complete system at working pressure m³/min | 3.49 | 3.04 | 4.63 |

Compressor block / airend speed rpm | 950 | 950 | 950 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 11 | 15 | 11 |

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

Compressed air connection, inlet | G ¾ | G ¾ | G ¾ |

Compressed air connection, outlet | G ¾ | G ¾ | G ¾ |

Dimensions
W x D x H mm | 1,550 x 880 x 1,020 | 1,550 x 880 x 1,020 | 1,550 x 880 x 1,020 |

Weight kg | 415 | 415 | 415 |

Model | N 351 13/45 bar |
---|---|

Inlet pressure bar | 13 |

Outlet pressure bar | 45 |

Flow rate complete system at working pressure m³/min | 4.18 |

Compressor block / airend speed rpm | 950 |

Number of pistons — | 2 |

Nominal motor output kW | 15 |

Sound pressure level dB(A) | 77 |

Compressed air connection, inlet | G ¾ |

Compressed air connection, outlet | G ¾ |

Dimensions
W x D x H mm | 1,550 x 880 x 1,020 |

Weight kg | 415 |

Technical specifications N 502-G

Model | N 502 5/25 bar | N 502 7,5/25 bar | N 502 7,5/35 bar |
---|---|---|---|

Inlet pressure bar | 5 | 7.5 | 7.5 |

Outlet pressure bar | 25 | 25 | 35 |

Flow rate complete system at working pressure m³/min | 2 | 3.19 | 2.87 |

Compressor block / airend speed rpm | 990 | 990 | 990 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 11 | 11 | 15 |

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

Compressed air connection, inlet | G 1 | G 1 | G 1 |

Compressed air connection, outlet | G ¾ | G ¾ | G ¾ |

Dimensions
W x D x H mm | 1,570 x 880 x 1,020 | 1,570 x 880 x 1,020 | 1,570 x 880 x 1,020 |

Weight kg | 460 | 460 | 460 |

Model | N 502 10/25 bar | N 502 10/35 bar | N 502 10/45 bar |
---|---|---|---|

Inlet pressure bar | 10 | 10 | 10 |

Outlet pressure bar | 25 | 35 | 45 |

Flow rate complete system at working pressure m³/min | 4.38 | 4.06 | 3.74 |

Compressor block / airend speed rpm | 990 | 990 | 990 |

Number of pistons — | 2 | 2 | 2 |

Nominal motor output kW | 11 | 15 | 18.5 |

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

Compressed air connection, inlet | G 1 | G 1 | G 1 |

Compressed air connection, outlet | G ¾ | G ¾ | G ¾ |

Dimensions
W x D x H mm | 1,570 x 880 x 1,020 | 1,570 x 880 x 1,020 | 1,570 x 880 x 1,020 |

Weight kg | 460 | 460 | 460 |

Model | N 502 13/35 bar | N 502 13/45 bar |
---|---|---|

Inlet pressure bar | 13 | 13 |

Outlet pressure bar | 35 | 45 |

Flow rate complete system at working pressure m³/min | 5.49 | 5.17 |

Compressor block / airend speed rpm | 990 | 990 |

Number of pistons — | 2 | 2 |

Nominal motor output kW | 15 | 18.5 |

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

Compressed air connection, inlet | G 1 | G 1 |

Compressed air connection, outlet | G ¾ | G ¾ |

Dimensions
W x D x H mm | 1,570 x 880 x 1,020 | 1,570 x 880 x 1,020 |

Weight kg | 460 | 460 |