Technical Gas Dewar Flasks for Oxygen, Nitrogen, Helium — separate, correctly specified vessels for each cryogen
REAL GAZ offers technical gas Dewar flasks for oxygen, nitrogen, helium and argon, with material, cleaning and insulation matched to each liquid.
Oxygen service demands oil-free cleaning, nitrogen is the workhorse coolant, and helium needs exceptional vacuum insulation because of its very low boiling point.
Oxygen service demands oil-free cleaning, nitrogen is the workhorse coolant, and helium needs exceptional vacuum insulation because of its very low boiling point.
Selection draws on ISO 21010, ISO 23208, EN 13458 and EN 1797 for cryogenic gas and material compatibility.
The boiling points explain the engineering: liquid helium boils at about minus 269 °C, liquid nitrogen at minus 196 °C, liquid argon at minus 186 °C and liquid oxygen at minus 183 °C. Helium therefore needs extra radiation shields and often a liquid nitrogen jacket, and it should be transferred only by trained users. Oxygen is not flammable itself but strongly supports combustion, so no oil or grease may touch the vessel. REAL GAZ keeps these rules clear in the handling notes that accompany every delivery. Because each liquid has its own hazards, staff training should be gas-specific. We can supply simple posters describing asphyxiation risk for nitrogen and helium, and fire risk for oxygen.
🏭 Where Technical Gas Dewars Are Used
- 🫁 Liquid oxygen — oxygen-cleaned vessels supply medical gas stores and welding or cutting operations under strict fire-safety controls;
- 🧊 Liquid nitrogen — the most common coolant serves sample storage, food chilling and shrink-fitting;
- 🧲 Liquid helium — superconducting magnets, NMR and low-temperature physics need helium at about 4 K in specialised transfer Dewars;
- 💨 Liquid argon — inert argon supports welding trials and ultra-clean metallurgical processes.
⚠️ Gas-Specific Handling
- oxygen — keep Dewars free from oil, grease and combustible materials at all times;
- nitrogen — ventilate rooms, because evaporating nitrogen displaces breathable air;
- helium — use dedicated transfer lines and expect very high expansion on warming.
💡 Why Choose REAL GAZ
- ✅ One catalogue — each cryogen is available from the same supplier with matching vessel types;
- 🧪 Dedicated vessels — separate vessels for each gas remove cross-contamination risk;
- 🎯 Correct cleaning — oxygen service units are cleaned and marked accordingly;
- 🔒 Safety literature — every liquid has a safety data sheet and an easy handling summary;
- 📄 Certificate of Analysis (CoA) — supplied with every order.
🔬 Quality Control & Safety
- multi-stage cleaning appropriate to each gas service;
- vacuum insulation verification;
- moisture & impurity analysis of each filled liquid;
- leak testing and pressure integrity checks.
Transport follows ADR / UN rules, with gas-specific labels and relevant EN/ISO standards.
⚙️ Trusted Gas Solutions
Laboratories and plants often need several cryogens at once, and REAL GAZ can coordinate technical gas Dewar flasks for oxygen, nitrogen, helium and argon in a single delivery plan. We supply Azerbaijan, Turkey, Georgia, Uzbekistan and the USA with careful attention to each gas.
REAL GAZ — the right vessel for every cryogen.