High-performance reciprocating compressors N-series boosters

Your ticket to high-pressure performance

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, two or three cylinders and operate within the following performance parameters:

  • Initial pressure up to 13 bar – discharge pressure up to 45 bar
  • Flow rate: 0.27 – 20.51 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
Life-cycle costs

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

 

Product details

Versions

For lower demand

N 60 G to N 153 G boosters, air-cooled

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.

For medium to large demand

N 253 G to N 502 G boosters, air-cooled

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).

N 2001 G booster, air-cooled

The N 2001 G air-cooled versions are equipped with a separate fan-assisted aftercooler to keep the temperature differential between the inlet and compressed air (ΔT) within close tolerances. To ensure optimal cooling performance with a ΔT value of only approximately 5 K even at high ambient temperatures, the N 2001 G models can be equipped with a water-cooled compressed air aftercooler.

Sample layout
Component layout of a compressed air station with boosters up to 45 bar
  1. Rotary screw compressor
  2. Air receivers
  3. Booster
  4. "High-pressure" air receiver
  5. "High-pressure" refrigeration dryer
  1. Pneumatic tools
  2. Low pressure network up to 13 bar
  3. Prefilter
  4. High-pressure microfilter
  5. Compressed air network at 45 bar

Compressed air system with booster up to 45 bar

Technical specifications N 60-G

Standard version

ModelN 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
Intake volume m³/min 0.4 0.57 0.73
Piston displacement m³/min 0.07 0.07 0.07
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, inletG ½ G ½ G ½
Compressed air connection, outletG 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

ModelN 60 13/35 bar
Inlet pressure bar 13
Outlet pressure bar 35
Flow rate Complete system at working pressure m³/min 0.75
Intake volume m³/min 0.93
Piston displacement m³/min 0.07
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, inletG ½
Compressed air connection, outletG ½
Dimensions W x D x H mm 920 x 450 x 550
Weight kg 70

Technical specifications N 153-G

Standard version

ModelN 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
Intake volume m³/min 0.89 0.89 1.27
Piston displacement m³/min 0.15 0.15 0.15
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, inletG ¾ G ¾ G ¾
Compressed air connection, outletG 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

ModelN 153 10/15 bar N 153 10/40 bar
Inlet pressure bar 10 10
Outlet pressure bar 15 40
Flow rate Complete system at working pressure m³/min 1.4 0.89
Intake volume m³/min 1.64 1.64
Piston displacement m³/min 0.15 0.15
Compressor block / airend speed rpm 650 650
Number of pistons 2 2
Nominal motor output kW 2.2 4
Sound pressure level dB(A) 74 74
Compressed air connection, inletG ¾ G ¾
Compressed air connection, outletG ½ G ½
Dimensions W x D x H mm 1,390 x 720 x 820 1,390 x 720 x 820
Weight kg 255 255

ModelN 153 13/40 bar
Inlet pressure bar 13
Outlet pressure bar 40
Flow rate Complete system at working pressure m³/min 1.33
Intake volume m³/min 2.08
Piston displacement m³/min 0.15
Compressor block / airend speed rpm 650
Number of pistons 2
Nominal motor output kW 4
Sound pressure level dB(A) 74
Compressed air connection, inletG ¾
Compressed air connection, outletG ½
Dimensions W x D x H mm 1,390 x 720 x 820
Weight kg 255

Technical specifications N 253-G

Standard version

ModelN 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
Intake volume m³/min 1.56 2.21 2.21
Piston displacement m³/min 0.26 0.26 0.26
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, inletG ¾ G ¾ G ¾
Compressed air connection, outletG 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

ModelN 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
Intake volume m³/min 2.86 2.86 3.64
Piston displacement m³/min 0.26 0.26 0.26
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, inletG ¾ G ¾ G ¾
Compressed air connection, outletG 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

ModelN 253 13/45 bar
Inlet pressure bar 13
Outlet pressure bar 45
Flow rate Complete system at working pressure m³/min 2.68
Intake volume m³/min 3.64
Piston displacement m³/min 0.26
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, inletG ¾
Compressed air connection, outletG ½
Dimensions W x D x H mm 1,390 x 730 x 810
Weight kg 290

Technical specifications N 351-G

Standard version

ModelN 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
Intake volume m³/min 2.29 3.25 3.25
Piston displacement m³/min 0.38 0.38 0.38
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, inletG ¾ G ¾ G ¾
Compressed air connection, outletG 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

ModelN 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
Intake volume m³/min 4.2 4.2 5.34
Piston displacement m³/min 0.38 0.38 0.38
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, inletG ¾ G ¾ G ¾
Compressed air connection, outletG 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

ModelN 351 13/45 bar
Inlet pressure bar 13
Outlet pressure bar 45
Flow rate Complete system at working pressure m³/min 4.18
Intake volume m³/min 5.34
Piston displacement m³/min 0.38
Compressor block / airend speed rpm 950
Number of pistons 2
Nominal motor output kW 15
Sound pressure level dB(A) 77
Compressed air connection, inletG ¾
Compressed air connection, outletG ¾
Dimensions W x D x H mm 1,550 x 880 x 1,020
Weight kg 415

Technical specifications N 502-G

Standard version

ModelN 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
Intake volume m³/min 3 4.25 4.25
Piston displacement m³/min 0.5 0.5 0.5
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, inletG 1 G 1 G 1
Compressed air connection, outletG 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

ModelN 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
Intake volume m³/min 5.5 5.5 5.5
Piston displacement m³/min 0.5 0.5 0.5
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, inletG 1 G 1 G 1
Compressed air connection, outletG 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

ModelN 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
Intake volume m³/min 6.99 6.99
Piston displacement m³/min 0.5 0.5
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, inletG 1 G 1
Compressed air connection, outletG 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

Technical specifications N 2001-GW

Standard version

ModelN 2001 W 5/25 bar N 2001 W 7,5/25 bar N 2001 W 10/25 bar
Inlet pressure bar 5 7.5 10
Outlet pressure bar 25 25 25
Flow rate Complete system at working pressure m³/min 9.13 11.43 15.51
Intake volume m³/min 11.37 13.26 17.16
Piston displacement m³/min 1.89 1.56 1.56
Compressor block / airend speed rpm 910 750 750
Number of pistons 3 3 3
Nominal motor output kW 37 37 37
Sound pressure level dB(A) 84 84 84
Compressed air connection, inletG 2 G 2 G 2
Compressed air connection, outletG 1½ G 1½ G 1½
Dimensions W x D x H mm 1,980 x 1,000 x 1,010 1,980 x 1,000 x 1,010 1,980 x 1,000 x 1,010
Weight kg 1,030 1,030 1,030

ModelN 2001 W 13/25 bar
Inlet pressure bar 13
Outlet pressure bar 25
Flow rate Complete system at working pressure m³/min 20.21
Intake volume m³/min 21.54
Piston displacement m³/min 1.54
Compressor block / airend speed rpm 740
Number of pistons 3
Nominal motor output kW 37
Sound pressure level dB(A) 84
Compressed air connection, inletG 2
Compressed air connection, outletG 1½
Dimensions W x D x H mm 1,980 x 1,000 x 1,010
Weight kg 1,030