The Danfoss Turbocor® Portfolio of Oil-Free Compressors

Oil-Free Performance Advantage

Oil-Free, magnetic bearing compressor technology eliminates complex oil and refrigerant lubrication management systems, resulting in a simplified chiller design, increased reliability, and reduced maintenance.

• Oil-free, magnetic bearings and integrated variable speed drive deliver industry-leading efficiency with no performance degradation over the life of the compressor.
• Permanent magnet synchronous motor provides high efficiency and enables compact design.
• Two-stage compression design provides flexibility for water-cooled and air-cooled chiller applications.

Zero Performance Degradation

Danfoss Turbocor® compressors have no oil in the system, meaning no performance degradation due to oil contamination. Combined with contact-free operation enabled by magnetic bearings, performance remains consistent over the compressor's life.

Performance Degradation Over Time

Oiled Compressors: Show a significant loss in efficiency over time (e.g., 20% loss in efficiency after 10 years).

Oil-Free Compressors: Show no change in efficiency over time.

Source: Tsinghua University Study 2014

Reduced Maintenance

Chillers using oil-free technology have fewer mechanical parts and a simpler design due to the elimination of oil management systems. This leads to reduced maintenance and higher reliability.

Total annual maintenance cost for oil management system: $3,650. Lifetime maintenance cost: $83,950 (based on 23-year chiller life expectancy per ASHRAE Handbook).

Danfoss Turbocor® TTS Series Compressors

Models: TTS300, TTS350, TTS400, TTS700

Efficient: Available in four models (60-200 tons / 200-700 kW), offering industry-leading efficiency with integrated part load values (IPLV) up to 40% better than comparable screw chillers.

Flexible: Capable of standard water-cooled and low lift operation. TTS300/TTS350 support high lift for air-cooled/heat recovery. TTS300 also handles medium evaporator temperatures (0 to -10 °C / 32 to 14 °F).

Quiet: Low sound levels (as low as 70.0 dBA at 1.5m / 5ft), up to 8 dBA lower than typical screw compressors, reducing noise-related complaints and sound treatment costs.

Environmentally Friendly: Available with HFC-134a (Zero Ozone Depletion Potential) and R513A (low GWP, non-flammable) refrigerants.

Danfoss Turbocor® TGS Series Compressors

Models: TGS230, TGS310, TGS390, TGS520

Efficient: Available in four models (40-150 tons / 140-540 kW), offering industry-leading efficiency with IPLV up to 40% better than comparable screw chillers.

Flexible: Capable of standard water-cooled and low lift operation. TGS230/TGS310 support high lift for air-cooled/heat recovery. TGS230 also handles medium evaporator temperatures (0 to -10 °C / 32 to 14 °F).

Quiet: Low sound levels (as low as 70.0 dBA at 1.5m / 5ft), up to 8 dBA lower than typical screw compressors.

Environmentally Friendly: Uses next-generation HFO-1234ze (GWP < 1, zero ODP) or low GWP R515B (GWP 299, ASHRAE A1 safety classification).

Danfoss Turbocor® TGS490 Compressor

Efficient: 85-140 tons / 300-490 kW capacity, suitable for air or water-cooled chillers. IPLV up to 50% better than comparable screw chillers.

Environmentally Friendly: First oil-free, magnetic bearing centrifugal compressor compatible with ultra-low GWP HFO-1234ze or R-515B (GWP 299, ASHRAE A1).

Lifecycle Cost Advantage: Up to 40% better part load efficiency vs. fixed speed screw compressors, no mechanical wear, and zero performance degradation. Can meet 400-ton air-cooled chiller capacity with three compressors.

Awarded 2020 AHR Expo Innovation Award.

Danfoss Turbocor® TTH and TGH Series Compressors

Models: TTH375, TGH285

Wide Operating Map: Expand oil-free benefits to high lift applications (pressure ratios up to 6.2), including air-cooled chillers in hot climates, hot water heat pumps, and low-temperature process applications. Can operate up to 156°F / 69°C saturated discharge temperature.

Efficient: TTH375 (107 tons / 376 kW), TGH285 (82 tons / 288 kW). Industry-leading efficiency with IPLV up to 40% better than comparable screw chillers.

Quiet: Low sound levels (as low as 70.0 dBA at 1.5m / 5ft), approximately 8 dBA lower than typical screw compressors.

Environmentally Friendly: TTH uses R134a or R513A. TGH uses HFO-1234ze (GWP < 1) or R515B (ASHRAE A1).

Awarded 2018 AHR Expo Product of the Year. Also recognized by China Ref and Mostra Convegno.

Danfoss Turbocor® VTT1200 Compressor

Efficient: Variable Twin Turbo (VTT) technology for larger capacity ranges (up to 400 tons / 1430 kW with economizer). Offers outstanding full and part load performance.

Stable Operation: Patented IntraFlow® technology extends stable operating range and increases turndown capability, minimizing surge risk while maintaining efficiency.

Flexible: Designed for water and evaporative cooled chiller applications, in single or multiple compressor configurations.

Environmentally Friendly: Awarded multiple accolades including 2015 AHR Expo Innovation Award. Available with HFC-134a (Zero Ozone Depletion Potential, no phase-out date).

Danfoss Turbocor® VTX1600 Compressor

Efficient: Variable Twin Turbo (VTX) technology for larger capacity ranges (up to 450 tons / 1600 kW with economizer). Unparalleled performance for water-cooled chillers (Full load efficiency = 0.52 kW/ton, IPLV = 0.32 kW/ton).

Stable Operation: Advanced impeller design and IGV allow extended unloading at standard AHRI conditions and constant pressure ratios.

Flexible Design: Offers variable refrigerant discharge pipe connection orientations (0°, 45°, 90°) and power connection options for flexibility in chiller design.

Environmental Friendliness and Performance

Danfoss promotes the use of low GWP refrigerants to combat global warming. Turbocor® compressors are available with:

• R134a: No flame propagation, GWP = 1300
• R513A: No flame propagation, GWP = 573
• R515B: No flame propagation, GWP = 299
• HFO1234ze: Lower flammability, GWP < 1

High Performance Alternative to Screw Compressors

Danfoss Turbocor® compressors offer a high-performance alternative to traditional oiled screw compressors. They are more efficient, quieter, and require less maintenance, resulting in a lower total cost of ownership and fewer customer complaints.

• More Efficient: Up to 40% better Part Load Efficiency versus fixed speed screw compressors.
• Low Noise: Approximately 8 dBA quieter.
• Less Maintenance: Fewer maintenance tasks due to the elimination of the oil management system.
• Oil-Free: Zero performance degradation over the life of the compressor.

Optimized for a Wide Range of Chiller Applications

Danfoss Turbocor® compressors feature a wide operating map, allowing chillers to operate in various comfort cooling, heating, and process applications.

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