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:
10,006 to 427,324 CFM

Differential pressure (Δp):
79,77 to 188,55 psi

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

Yes
Type of technology
Screw Compressors
Design
Positive pressure
Differential pressure (Δp)
79,77 to 188,55 psi
Volume flow
10,006 to 427,324 CFM
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, psi Volume flow*, CFM Motor power, hp Width (W), in Depth (D), in Height (H), in Weight, lb
SI 8 A/W** | 8 bar 116,03 37,082 10,7 26 34 49 474
SI 8 A/W** | 10 bar 145,04 30,607 10,7 26 34 49 474
SI 8 A/W** | 13 bar 188,55 24,721 10,7 26 34 49 474
SI 11 A/W** | 8 bar 116,03 52,385 14,8 26 34 49 485
SI 11 A/W** | 10 bar 145,04 44,734 14,8 26 34 49 485
SI 11 A/W** | 13 bar 188,55 39,436 14,8 26 34 49 485
SI 15 A/W** | 8 bar 116,03 83,581 20,1 26 34 49 551
SI 15 A/W** | 10 bar 145,04 68,278 20,1 26 34 49 551
SI 15 A/W** | 13 bar 188,55 57,683 20,1 26 34 49 551
SI 19 A/W** | 8 bar 116,03 103,005 25,5 3 33 57 661
SI 19 A/W** | 10 bar 145,04 88,29 25,5 3 33 57 661
SI 19 A/W** | 13 bar 188,55 68,866 25,5 3 33 57 661
SI 22 A/W** | 8 bar 116,03 127,138 29,5 3 34 57 705
SI 22 A/W** | 10 bar 145,04 107,714 29,5 3 34 57 705
SI 22 A/W** | 13 bar 188,55 92,41 29,5 3 34 57 705
SI 30 A/W** | 8 bar 116,03 165,397 40,2 33 39 69 1,036
SI 30 A/W** | 10 bar 145,04 148,327 40,2 33 39 69 1,036
SI 30 A/W** | 13 bar 188,55 129,492 40,2 33 39 69 1,036
SI 37 A/W** | 8 bar 116,03 217,782 49,6 33 39 69 1,19
SI 37 A/W** | 10 bar 145,04 188,352 49,6 33 39 69 1,19
SI 37 A/W** | 13 bar 188,55 161,865 49,6 33 39 69 1,19
SI 45 A/W** | 8 bar 116,03 260,75 60,3 37 46 69 1,455
SI 45 A/W** | 10 bar 145,04 227,2 60,3 37 46 69 1,455
SI 45 A/W** | 13 bar 188,55 195,415 60,3 37 46 69 1,455
SI 55 A/W** | 8 bar 116,03 330,793 73,8 37 46 69 1,742
SI 55 A/W** | 10 bar 145,04 297,243 73,8 37 46 69 1,742
SI 55 A/W** | 13 bar 188,55 250,744 73,8 37 46 69 1,742
SI 75 A/W** | 8 bar 116,03 427,324 100,6 52 91 66 3,527
SI 75 A/W** | 10 bar 145,04 395,539 100,6 52 91 66 3,527
SI 75 A/W** | 13 bar 188,55 322,553 100,6 52 91 66 3,527

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

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Product overview [A1-004]

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Compressed Air

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