At Millrock Technology, we don’t just lead in freeze-drying innovation, we’re helping shape a more sustainable future for the industry.

Our commitment to environmental responsibility is reflected in our adoption of natural refrigerants — R-1270 (Propylene), R-170 (Ethane), and NitroLyo(™) (Liquid Nitrogen–Based Cooling System) — as part of our advanced freeze-drying solutions. These natural alternatives deliver the cooling performance our customers expect while dramatically reducing environmental impact.

Millrock’s modern freeze-drying systems safely use natural refrigerants with ultra-low GWP, engineered in precise, small quantities that comply with all safety standards—or in the case of NitroLyo, eliminate synthetic refrigerants entirely. The result: high performance without compromise.

Why Natural Refrigerants?

HydroFluoroCarbons (HFC) refrigerants often carry high Global Warming Potential (GWP) and pose long-term risks to both people and the planet. In contrast, natural refrigerants offer:

• Ultra-low GWP: Hydrocarbons and LN2-based systems have a dramatically lower environmental impact than synthetic refrigerants.
• High efficiency: Natural refrigerants deliver fast, effective cooling, supporting demanding freeze-drying applications.
• Future compliance: As global regulations phase out high-GWP refrigerants, Millrock customers are already prepared.

R-1270 (Propylene)

An efficient and reliable choice for mid- and low-temperature cooling, R-1270 provides:

• Excellent thermodynamic performance
• Low environmental impact with GWP of just 2
• Proven stability and compatibility with modern system designs

R-170 (Ethane)

Ideal for ultra-low temperature applications, R-170 offers:

• Powerful cooling capacity at extremely low temperatures
• Rapid pull-down performance
• GWP of only 6, aligning with global climate goals

LN2 (Liquid Nitrogen)

• A natural, non-flammable refrigerant option
• Enables ultra-low temperature operation without synthetic refrigerants
• Readily available and safe when managed with proper protocols
• Minimal to zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP)

Innovation Without Compromise

We understand that choosing a freeze dryer is about more than performance — it’s about partnership, compliance, and preparing for the future. That’s why our systems are engineered to integrate seamlessly with natural refrigerants, delivering:

• The same high performance Millrock is known for
• Easy serviceability and reliability
• Forward-looking environmental stewardship

Ready to future-proof your freeze-drying operation?

Let’s talk about how Millrock’s natural refrigerant solutions can support your goals — and the planet.

Now available on our Stellar^®, Revo^® , Magnum^® , and Magnum^® XL freeze dryers.