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:
17 to 726 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 omnipresent in industry and has become indispensable in many applications - be it in chemical/ petrochemical process technology, electronics and
semiconductor production and many other areas.
 

Electrical and semiconductor industry

The following applies to the process requirements: The compressed air must be clean and dry; downtimes due to contaminated systems or entire
product batches must be avoided at all costs. High reliability and availability are a must.
 

Chemical and petrochemical industry

Uninterrupted continuous operation in chemical plants requires a continuous supply of compressed air. Our powerful compressors ensure reliable operation.
The service life of the packages is an important aspect when the plants are used continuously.
 

Oil and gas industry

Heat, electricity and petrol are the products in this branch. Compressed air plays a central role in the production. Pneumatic applications in the oil and gas industry are challenging and require the highest level of safety. The control system, instrument or buffer air requires 100 % oil-free operation.

US Units

No
Type of technology
Screw Compressors
Design
Positive pressure
Differential pressure (Δp)
5,500 to 13,000 mbar
Volume flow
17 to 726 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

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 63 8 660 875 1,250 215
SI 8 A/W** | 10 bar 10,000 52 8 660 875 1,250 215
SI 8 A/W** | 13 bar 13,000 42 8 660 875 1,250 215
SI 11 A/W** | 8 bar 8,000 89 11 660 875 1,250 220
SI 11 A/W** | 10 bar 10,000 76 11 660 875 1,250 220
SI 11 A/W** | 13 bar 13,000 67 11 660 875 1,250 220
SI 15 A/W** | 8 bar 8,000 142 15 660 875 1,250 250
SI 15 A/W** | 10 bar 10,000 116 15 660 875 1,250 250
SI 15 A/W** | 13 bar 13,000 98 15 660 875 1,250 250
SI 19 A/W** | 8 bar 8,000 175 19 770 850 1,450 300
SI 19 A/W** | 10 bar 10,000 150 19 770 850 1,450 300
SI 19 A/W** | 13 bar 13,000 117 19 770 850 1,450 300
SI 22 A/W** | 8 bar 8,000 216 22 770 870 1,450 320
SI 22 A/W** | 10 bar 10,000 183 22 770 870 1,450 320
SI 22 A/W** | 13 bar 13,000 157 22 770 870 1,450 320
SI 30 A/W** | 8 bar 8,000 281 30 850 980 1,750 470
SI 30 A/W** | 10 bar 10,000 252 30 850 980 1,750 470
SI 30 A/W** | 13 bar 13,000 220 30 850 980 1,750 470
SI 37 A/W** | 8 bar 8,000 370 37 850 980 1,750 540
SI 37 A/W** | 10 bar 10,000 320 37 850 980 1,750 540
SI 37 A/W** | 13 bar 13,000 275 37 850 980 1,750 540
SI 45 A/W** | 8 bar 8,000 443 45 950 1,180 1,750 660
SI 45 A/W** | 10 bar 10,000 386 45 950 1,180 1,750 660
SI 45 A/W** | 13 bar 13,000 332 45 950 1,180 1,750 660
SI 55 A/W** | 8 bar 8,000 562 55 950 1,180 1,750 790
SI 55 A/W** | 10 bar 10,000 505 55 950 1,180 1,750 790
SI 55 A/W** | 13 bar 13,000 426 55 950 1,180 1,750 790
SI 75 A/W** | 8 bar 8,000 726 75 1,330 2,300 1,670 1,600
SI 75 A/W** | 10 bar 10,000 672 75 1,330 2,300 1,670 1,600
SI 75 A/W** | 13 bar 13,000 548 75 1,330 2,300 1,670 1,600

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

Brochure

Product overview [A1-004]

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Brochure

Compressed Air

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