Danfoss Expands EXO Program With OFB Tight Oil-Free Shut-Off Ball Valve Range
Danfoss has expanded its EXO program with the introduction of the OFB tight oil-free shut-off ball valve range, targeting refrigeration, HVAC, and industrial cooling applications where oil-free system integrity is critical. As compressor technologies and refrigerant regulations evolve, oil-free environments are becoming more common — and traditional valve designs don’t always meet the new demands.
The OFB range is designed specifically for oil-free compressor systems, offering tight shut-off performance, improved reliability, and compatibility with modern refrigerants. Here’s what engineers and specifiers need to know.
WHAT IS THE OFB OIL-FREE BALL VALVE?
The OFB valve is engineered to operate in systems where lubricating oil is either absent or present in minimal quantities. In conventional refrigeration and cooling systems, oil circulates with refrigerant to lubricate compressors and internal components.
However, oil-free centrifugal and magnetic bearing compressors are increasingly being adopted for efficiency and reduced maintenance.
The OFB design addresses this by providing:
• Tight shut-off performance without oil presence
• Optimised internal geometry for clean refrigerant flow
• Materials compatible with modern low-GWP refrigerants
• Reduced risk of contamination or performance degradation
This makes the OFB valve particularly relevant in next-generation cooling infrastructure.
WHY OIL-FREE SYSTEMS ARE GROWING
Oil-free compressor systems are gaining traction because they offer:
• Higher energy efficiency
• Reduced maintenance intervals
• Improved heat exchanger performance
• Cleaner system operation
Without oil circulating, heat exchangers remain cleaner, maintaining better thermal efficiency over time. However, this also means every component in the system — including valves — must tolerate dry operating conditions.
The expansion of the EXO program reflects a broader industry shift toward low-maintenance, high-efficiency cooling systems.
KEY USE CASES FOR THE OFB RANGE
The OFB oil-free shut-off ball valve is suited for:
• Industrial refrigeration plants
• Data centre cooling systems
• District cooling networks
• Large commercial HVAC installations
• Chiller plants using oil-free compressors
In these applications, reliable isolation is essential during maintenance or system adjustments. Tight shut-off reduces refrigerant loss and enhances operational safety.
Because refrigerant regulations continue to tighten across Europe and globally, ensuring minimal leakage is becoming both a performance and compliance requirement.
DESIGN CONSIDERATIONS FOR SPECIFIERS
When selecting oil-free shut-off valves, engineers should review:
• Refrigerant compatibility
• Pressure rating alignment
• Temperature range capability
• Sealing materials
• Installation orientation
Oil-free systems may experience different thermal and pressure dynamics compared to traditional oil-lubricated systems. Specifiers should confirm that sealing surfaces and seat materials are suitable for dry operation and refrigerant chemistry.
The OFB range supports modern refrigerants and evolving regulatory frameworks, making it suitable for long-term infrastructure planning.
WHAT THIS MEANS FOR THE MARKET
The expansion of the EXO program signals that manufacturers are adapting to structural shifts in cooling technology. Oil-free compressor adoption is not a niche trend — it is becoming mainstream in large-scale installations prioritising sustainability and efficiency.
For contractors and facility operators, specifying valves designed specifically for oil-free environments reduces long-term risk. Retrofitting traditional valves into oil-free systems can lead to wear, leakage, or premature failure.
In 2026 and beyond, system compatibility and lifecycle efficiency are driving component selection more than ever before.
Wrap Up
Danfoss’ introduction of the OFB tight oil-free shut-off ball valve range under its EXO program aligns with the industry’s shift toward cleaner, more efficient cooling systems. As oil-free compressor technology expands across industrial and commercial applications, valve technology must evolve alongside it.
For engineers and specifiers, the message is clear: oil-free systems require purpose-built components. The OFB range is a response to that demand, offering reliable isolation and performance in modern refrigeration and HVAC environments.
