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Oil-Free Compressed Air
Consistently tuned for efficiency

Screw Compressor
SO-2 Series
45 – 355 kW

Absolutely oil-free compressed air — effective sealing between oil system and compression chamber
High delivery volumes with the lowest specific power consumption
Compressor stage with minimal wear — generously dimensioned bearings and fine tolerances
Effective vibration decoupling — quiet operation and reduced component wear
Maintenance-friendly design throughout the full power range
Lubrication
Oil-free
Cooling
Air & water-cooled
Max FAD
Up to 50.30 m³/min
Air quality
Absolutely oil-free
BOGE SO 76-2 W oil-free water-cooled screw compressor — available in Sri Lanka from Tranco Tech
01Specifications
02Features
03Information Material
Select Power Range
SO-2 Series  —  45 – 90 kW
SO-2 Series  —  200 – 355 kW
SO-2 Series — 45–90 kW

The strengths of the
medium-sized SO-2 series

Intelligently structured and high-quality manufactured — our technologically mature SO-2 series presents itself innovatively down to the last detail. The effective decoupling of the compressor and cooling sections ensures quiet operation and minimal vibrations, while the deliberately maintenance-friendly design ensures that the production of oil-free compressed air proceeds safely, reliably and economically — whether air- or water-cooled.

As the heart of the SO-2 series, the compressor stage impresses — with high-quality, generously dimensioned bearings, fine tolerances and effective sealing between the oil system and compression chamber. All for absolutely oil-free compressed air and high delivery volume with the lowest specific power.
In the interest of long service life, the coolers have been designed extra large and only high-quality materials were used. To ensure cooling of the hot compressed air to a consistently low temperature, the principle “water through the pipes” applies with constant water velocity.
Only effective condensate separation, together with optimised flow guidance of the compressed air, creates the prerequisite for optimal cooling. This, in turn, guarantees minimal pressure losses and high energy efficiency.
The vibration and stress damping decoupling of the compressor and cooling sections as well as other components not only achieves an efficient reduction of pulsation vibrations and sound level. It also ensures reduced wear and longer service life of the components.
BOGE SO 101 FA (45–90 kW medium range)
Key Figures — 45–90 kW
Power range
45 – 90 kW
FAD range
5.25 – 13.14 m³/min
Cooling
Air & water
Lubrication
Oil-free
Across the Full SO-2 Family

Engineering strengths shared
by every SO-2 model

Absolutely Oil-Free
Effective sealing between the oil system and the compression chamber ensures that no oil enters the compressed air stream — delivering oil-free air suitable for the most sensitive industrial applications.
Precision Compressor Stage
Generously dimensioned, high-quality bearings and fine manufacturing tolerances at the core of every SO-2. The result: high delivery volumes with the lowest specific power consumption across the full operating range.
Vibration Decoupling
Compressor and cooling sections are mechanically decoupled throughout the range, achieving a significant reduction in pulsation vibrations and sound levels while reducing component wear and extending service life.
High Energy Efficiency
Optimised flow guidance and effective condensate separation minimise internal pressure losses across the entire machine, ensuring that every kilowatt of electrical input is converted into maximum compressed air output.
Maintenance-Friendly
Deliberately maintenance-friendly design across both power ranges ensures that the safe, reliable and economical production of oil-free compressed air is sustained throughout the machine's working life with minimal intervention.
Frequency Control Option
Integrated frequency control variants available across the range, automatically adjusting compressed air output to match actual demand — eliminating idle losses and reducing energy consumption in variable-demand applications.
Available Options

Uncompromising quality &
reliability — in any configuration

The wide range of SO-2 models, combined with highly specialised system components, allows the compressed air system to be matched specifically to your requirements. Contact Tranco Tech for a tailored recommendation.

Frequency Control (VSD)
Demand-matched output automatically adjusts compressed air generation to actual consumption — reducing energy use and eliminating idle running losses.
Air Cooling (45–90 kW)
Air-cooled variants available in the 45–90 kW range for installations where water supply is limited or cooling water infrastructure is not in place.
Water Cooling
Available across both power ranges. The 200–355 kW range is water-cooled as standard, using shell-and-tube heat exchangers for highly effective thermal management.
Heat Recovery
Recovery of compression heat for use in process or building heating applications, improving whole-system energy efficiency and reducing overall operating costs.
Typical Applications

Ideal wherever oil-free air
is non-negotiable

From the innovative compressor technology to the effective sealing between the oil system and compression chamber, the SO-2 series makes no compromises. These models are ideally suited for sensitive applications where the highest compressed air quality is required, while also providing very economical, cost-saving compressed air generation.

💊Pharmaceutical
🍃Food & Beverage
🏥Healthcare
🧵Textile
🔬Electronics
🎨Paint & Coating
⚙️Mechanical Eng.
⚡Energy
Information Material

Expert Knowledge & Technical Data

SO-2 Series — 45 – 90 kW
Brochure — SO-2 Series (45–90 kW)
Available on request  ·  PDF
Datasheet — SO-2 Series (45–90 kW)
Available on request  ·  PDF
SO-2 Series — 200 – 355 kW
Brochure — SO-2 Series (200–355 kW)
Available on request  ·  PDF
Datasheet — SO-2 Series (200–355 kW)
Available on request  ·  PDF

To request any of the above documents, contact Tranco Tech at info@trancotech.com or call +94 114 348 437.

Also in Our Oil-Free Range

Find Exactly the Right Solution

SO-3 Series
Oil-free  ·  110–315 kW
→
S-3 bluekat
Oil-free Class 0  ·  30–45 kW
→
S-3 Series
Oil-lubricated  ·  22–315 kW
→
S-4 Series
Oil-lubricated  ·  37–160 kW
→

Need Help Choosing the Right Model?

Our engineering team will assess your air quality requirements, flow rate, operating pressure and duty cycle — and recommend the right SO-2 configuration for your application.

Request a Quote → Contact Our Engineers

No. 81, Aramaya Place, Colombo 09  ·  +94 114 348 437  ·  info@trancotech.com