Danfoss Launches Transcritical CO₂ Oil Separator, Receiver Line Rated to 140Bar

Danish component manufacturer Danfoss has launched a new line of oil separators and receivers for transcritical CO₂ (R744) systems, rated at a maximum working pressure of 140bar (2,030psi).

Suitable for CO₂ chillers, heat pumps and refrigeration systems, the new OUB line spans capacities from 89 to 1,400kW (25.3 to 398.1TR) and is available in both serviceable and hermetic models. Tested to a pressure of 200.2bar (2,903psi), the steel vessels are rated for refrigerant temperatures from 10 to 150°C (14 to 302°F).

“With OUB, we’re giving OEMs a technically advanced oil management solution that integrates seamlessly into high-pressure CO₂ systems,” said Mark Sever, Global Solutions Expert at Danfoss. “It’s engineered for reliability, serviceability and long-term performance in demanding applications.”

Serviceable models: The OUB-TS separators filter oil particles down to 0.3 microns (µm) using a three-stage coalescing design that promotes progressive droplet growth.

• The range includes OUB-TSR models with an integrated receiver and OUB-TSN models without a receiver.
• With a high-strength, clog-resistant design, the 3,300cm² (512in²) filter supports “extended service intervals,” according to Danfoss.
• The OUB-TS line is available in eight sizes, covering CO₂ systems capacities from 89 to 1,400kW.

Hermetic units: The OUB-THR model is a fully sealed maintenance-free option that includes an integrated receiver. It uses mechanical demister technology to separate oil particles from the refrigerant stream in the 3‒10µm range.

• The line is available in five sizes, covering CO₂ system capacities from 89 to 420kW (25.3 to 119.4TR).

Hydrocarbon news: Danfoss debuted its new oil-free isobutane (R600a) Turbocor compressor, with a maximum cooling capacity of 385kW (109TR), at the March 24–27 Mostra Convegno Expocomfort (MCE) 2026 trade show in Milan.

• Designed for air-cooled chiller applications, the compressor targets HVAC and data center cooling, Frank Ford, Head of Sales and Marketing at Danfoss, told NaturalRefrigerants.com.
• In data center applications, the unit can deliver up to 500kW (142TR) of cooling capacity due to higher chilled–water temperatures.
• “Some data center customers continue to talk about natural [refrigerants],” Ford said, adding that, with multiple compressors, Trubocor can support chiller capacities of up to 2MW (568TR).

Quotable: “OUB integrates seamlessly with our complete oil management ecosystem, including COM oil management controls, level sensors, filter driers and valves,” Danfoss said.

“With OUB, we’re giving OEMs a technically advanced oil management solution that integrates seamlessly into high-pressure CO₂ systems.”

Mark Sever, Global Solutions Expert at Danfoss.