Cool facts: How to Produce Liquid Nitrogen with a Generator

Liquid nitrogen (LN₂) is typically supplied in bulk tanks, dewars, or vessels by gas companies. However, relying on deliveries comes with challenges, from supply chain delays, storage limitations, to recurring costs. A more reliable and efficient way is producing LN₂ on-site using the CRYOGEN liquid Nitrogen generator by F-DGSi. With just a power connection, this generator produces 8 to 960 liters per day—automatically. Here’s how it works:

Step 1: Generating Nitrogen Gas

The LN₂ production process starts by generating Nitrogen gas from ambient air. A built-in Nitrogen generator uses Pressure Swing Adsorption (PSA) technology to separate N₂ from compressed air, delivering high-purity Nitrogen gas that is stored in a tank, ready for liquefaction.

Step 2: Cooling & Liquefaction

To transform Nitrogen gas into liquid, it needs to be cooled to –196°C (-321°F). CRYOGEN achieves this using the proven Gifford-McMahon cooling technology, which relies on a cold-head design to compress and expand Helium gas. A Cryo-Refrigerator, mounted on the built-in dewar, then liquefies the Nitrogen gas.

Step 3: Storing and Dispensing Liquid Nitrogen

The liquefied Nitrogen drops into a built-in certified dewar for a safe storage. Dispensing options include:

• Insulated hose for external distribution.
• Front flask dispensing system for small-scale applications.
• Automatic dispensing and filling system for efficient transfer.

Interested to see the CRYOGEN liquid Nitrogen generator in action? Watch our demonstration video on the step-by-step process of Nitrogen generation, cooling, liquefaction, storage and dispensing of the liquid Nitrogen.

Features of the CRYOGEN Series:

• On-Demand Production: Generate liquid Nitrogen from ambient air.
• Convenience: No delivery delays or reliance on external suppliers.
• Flexible Output: Produce 8–960 L/day (higher capacities available).
• High Purity: Produce liquid Nitrogen with 99% purity (oxygen < 1%).
• Economical Performance: On-site liquid Nitrogen generation is a highly cost-effective solution and delivers a fast return on investment.
• Safety First: Designed with a robust cabinet, certified built-in dewar, safety valves and advanced electronics for secure use.
• Low Maintenance: Designed for minimal servicing and maximum uptime.
• Easy to operate and dispense: Touch-screen control for easy operation and diagnostics. Multiple dispensing options to offer flexibility and ease of use.
• Remote control: Monitor and control via USB or internet.

Make your own liquid nitrogen, anywhere, anytime with CRYOGEN.

F-DGSi is a French manufacturer of gas generators (Hydrogen, Air Zero, Nitrogen) and Liquid Nitrogen generators delivering reliable, high-quality and innovative solutions to laboratories worldwide. Contact us for more information.