Screw Compressors Oil-injected single-stage Screw Compressor
Series SI

Thanks to an innovative screw compressor stage and a highly efficient class IE5 permanent magnet motor, the single-stage, oil-injected compressed air packages in the SI series achieve a very high energy efficiency level - even in partial load operation. This enables significant energy savings in compressed air generation and contributes significantly to economical, resource-saving and sustainable processes

Volume flow:
25 to 915 m3/h

Differential pressure (Δp):
5,500 to 13,000 mbar

Medium:
Air, Neutral Gases

Compression:
Oil injected

The advantages of AERZEN Screw Compressors Series SI at a glance:

  • Maximum energy efficiency - even in partial load operation
  • Reduced investment costs due to the extensive eligibility for subsidies based on the BAFA subsidy programmes
  • Extended volume flow control range by integrated VFD technology
  • Unrivalled reliability thanks to an innovative package design
  • Secure use in extreme environmental conditions and with the most difficult requirements
  • Maximum noise reduction thanks to innovative package design
  • Reduced service costs due to extended maintenance intervals and roller bearings in PM motors being no longer required
  • Compact design leads to a very small footprint

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As diverse as your applications

Compressed air is ubiquitous in industry and is indispensable in many applications – be it in chemical/petrochemical process engineering, electronics, semiconductor manufacturing, and many other areas.
 
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US Units

No
Type of technology
Screw Compressors
Design
Positive pressure
Differential pressure (Δp)
5,500 to 13,000 mbar
Volume flow
25 to 915 m3/h
Medium
Air, Neutral Gases
Compression
Oil injected

Outstanding energy efficiency

  • Significant energy savings, achieved through extremely high efficiency in the compressor stages, in connection with the highly efficient PM motor, offering an energy efficiency of approx. 96% - even in partial load operation (class IE5-IE6)
  • Innovative and robust screw compressor stages with new, highly efficient 4+6 profiles
  • Extended turndown through the targeted use of VFD technology
  • Optimised cooling of the compressor stage and motor thanks to double-walled cooling jackets in both units. Cooling and lubrication are realised by a common oil circuit for both the compressor and the motor
  • The PM motor has a high efficiency even at low speeds. The requested quantity of compressed air is adjusted as required by means of a VFD. The harmonised combination of the high-quality drive train and the highly efficient compressor stage results in particularly efficient operation of the entire system
  • The rotor of the PM motor is connected directly to the compressor shaft so that additional losses in the drive train are avoided
     

High reliability and durability

  • The compact design of the compressor stage and drive train, which nevertheless allows ideal accessibility, simplifies the maintenance of this unit. The PM motor does not require any anti-friction bearings at all and is therefore characterised by a particularly high level of service-friendliness
  • Extended fields of application: option for secure use at particularly high or low ambient temperatures, through to use in extreme external conditions, such as installation in polar regions or in desert areas
  • Increased bearing service life of up to 30,000 hours for compressor stages
  • The permanent monitoring of the pressure and operating temperatures enables very reliable operation of the entire system
  • The oil cooler included in the standard scope of supply sustainably increases the reliability of the package in extreme climatic conditions
     

Reduced maintenance effort

  • Operation and maintenance exclusively from the operating and rear side
  • PM motor technology eliminates the need for anti-friction bearing lubrication and bearing changes
  • Easy transport of the entire, compact package selectively with pallet truck, fork lift truck or craneWhen delivered, the machine is already filled with oil; therefore, the machine does not need to be filled with oil as part of the commissioning process
     

Smart oil system

  • Only one oil circuit is required for lubrication and cooling of the compressor and motor.
  • The integrated oil pressure lubrication of the bearings enables bearing service lives of up to 30,000 hours
     

Intelligently reduced sound levels

  • Minimum sound pressure levels of 70 dB(A) are achieved
  • Depending on your requirements, you can choose between different options for sound insulation materials, silencer technologies and acoustic hood designs
  • High-quality intake regulator for the reduction of intake losses and noise
  • Sound technically optimised acoustic hood
  • Thanks to the oil cooling jacket for the PM motor and the use of a centrifugal fan, the lowest noise levels are realised

Compressed air screw compressor SI series - oil-injected, PM Motor

The oil-injected compressed air packages in the SI series with innovative screw compressor stages and highly efficient IE5 class permanent magnet motors. Maximum energy efficiency in full and partial load operation, with differential pressures between 5.5 and 13 bar and drive power from 7.5 - 90 kW.

Oil-injected single-stage Screw Compressor
Series SI — Performances & dimensions

Positive pressure
Series Performance data Dimensions and weights
Pressure difference, mbar Volume flow*, m3/h Motor power, kw Width (W), mm Depth (D), mm Height (H), mm Weight, kg
SI 8 A/W** | 8 bar 8.000 60 8 850 660 1.520 200
SI 8 A/W** | 10 bar 10.000 50 8 850 660 1.520 200
SI 8 A/W** | 11 bar 11.000 46 8 850 660 1.520 200
SI 8 A/W** | 13 bar 13.000 41 8 850 660 1.520 200
SI 11 A/W** | 8 bar 8.000 96 11 850 660 1.520 220
SI 11 A/W** | 10 bar 10.000 85 11 850 660 1.520 220
SI 11 A/W** | 11 bar 11.000 79 11 850 660 1.520 220
SI 11 A/W** | 13 bar 13.000 52 11 850 660 1.520 220
SI 15 A/W** | 8 bar 8.000 154 15 875 660 1.250 250
SI 15 A/W** | 10 bar 10.000 132 15 875 660 1.250 250
SI 15 A/W** | 11 bar 11.000 122 15 875 660 1.250 250
SI 15 A/W** | 13 bar 13.000 97 15 875 660 1.250 250
SI 19 A/W** | 8 bar 8.000 181 19 850 770 1.450 300
SI 19 A/W** | 10 bar 10.000 168 19 850 770 1.450 300
SI 19 A/W** | 11 bar 11.000 161 19 850 770 1.450 300
SI 19 A/W** | 13 bar 13.000 118 19 850 770 1.450 300
SI 22 A/W** | 8 bar 8.000 228 22 870 770 1.450 320
SI 22 A/W** | 10 bar 10.000 210 22 870 770 1.450 320
SI 22 A/W** | 11 bar 11.000 201 22 870 770 1.450 320
SI 22 A/W** | 13 bar 13.000 154 22 870 770 1.450 320
SI 30 A/W** | 8 bar 8.000 314 30 980 850 1.750 470
SI 30 A/W** | 10 bar 10.000 282 30 980 850 1.750 470
SI 30 A/W** | 11 bar 11.000 266 30 980 850 1.750 470
SI 30 A/W** | 13 bar 13.000 209 30 980 850 1.750 470
SI 37 A/W** | 8 bar 8.000 401 37 980 850 1.750 540
SI 37 A/W** | 10 bar 10.000 378 37 980 850 1.750 540
SI 37 A/W** | 11 bar 11.000 366 37 980 850 1.750 540
SI 37 A/W** | 13 bar 13.000 276 37 980 850 1.750 540
SI 45 A/W** | 8 bar 8.000 496 45 1.180 950 1.750 660
SI 45 A/W** | 10 bar 10.000 450 45 1.180 950 1.750 660
SI 45 A/W** | 11 bar 11.000 427 45 1.180 950 1.750 660
SI 45 A/W** | 13 bar 13.000 352 45 1.180 950 1.750 660
SI 55 A/W** | 8 bar 8.000 609 55 1.180 950 1.750 790
SI 55 A/W** | 10 bar 10.000 570 55 1.180 950 1.750 790
SI 55 A/W** | 11 bar 11.000 551 55 1.180 950 1.750 790
SI 55 A/W** | 13 bar 13.000 413 55 1.180 950 1.750 790
SI 75 A/W** | 8 bar 8.000 827 75 1.650 1.230 1.870 1.600
SI 75 A/W** | 10 bar 10.000 756 75 1.650 1.230 1.870 1.600
SI 75 A/W** | 11 bar 11.000 721 75 1.650 1.230 1.870 1.600
SI 75 A/W** | 13 bar 13.000 588 75 1.650 1.230 1.870 1.600
SI 90 A/W** | 8 bar 8.000 915 90 1.800 1.330 1.870 2.000
SI 90 A/W** | 10 bar 10.000 822 90 1.800 1.330 1.870 2.000
SI 90 A/W** | 11 bar 11.000 776 90 1.800 1.330 1.870 2.000
SI 90 A/W** | 13 bar 13.000 720 90 1.800 1.330 1.870 2.000

Data available on request without specification

Sound pressure level without blow-off noise, with acoustic enclosure.
* corresponds to the measured delivery volume flow converted to the customer-specific suction conditions p = 1,0 bar, t =20°C, rF = 0%
**Cooling: A: air-cooled and W: water-cooled

Information & documents

Product overview EN

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Product overview EN

Brochure

Compressed Air

Brochure