Buy Dewar Flasks — vacuum-insulated vessels ready for your liquid gas
When you buy Dewar flasks from REAL GAZ, you receive double-walled, vacuum-insulated vessels that hold liquid nitrogen, argon, oxygen and other cryogenic liquids with very low evaporation losses.
Each flask is inspected before dispatch, so the neck, the lid and the inner liner are ready for daily use in a workshop, clinic or laboratory.
Each flask is inspected before dispatch, so the neck, the lid and the inner liner are ready for daily use in a workshop, clinic or laboratory.
REAL GAZ supplies flasks designed in line with EN 13458, ISO 21029 and the cleanliness guidance of ISO 23208, for industrial, research and field use.
A Dewar flask works because a vacuum between two stainless-steel walls almost eliminates conduction and convection, while reflective layers reduce radiant heat. A well-made 10 litre flask typically loses only a small percentage of its liquid nitrogen each day, which makes planning easy. Before you buy, think about how the flask will be moved, who will fill it and where it will stand. Our advisers will also explain why liquid nitrogen at minus 196 °C must never be sealed in an airtight container, and how to prepare a ventilated storage corner that meets typical workplace rules. Ask about the lead time for your chosen model, and request a first fill together with the flask so that you can begin work on the day it arrives. Spare lids and neck plugs are inexpensive and worth keeping in stock.
🏭 Where Dewar Flasks Are Used
- 🔬 Sample preservation — small flasks of 1 to 10 litres keep biological material and reagents at liquid nitrogen temperature on a bench or in a transport case;
- 🍦 Food and beverage — shallow-neck flasks supply liquid nitrogen for rapid chilling, freezing demonstrations and modified-atmosphere trials;
- 🛠️ Shrink-fitting — engineers cool bearings and bushings in a flask so they can be assembled with an interference fit;
- 🏥 Veterinary and dermatology — clinics draw small, controlled volumes of liquid nitrogen for cryotherapy under trained supervision.
📦 Choosing the Right Flask
- capacity — from pocket-size 0.5 litre to 35 litre transfer flasks, matched to the number of refills you need;
- neck width — wide necks suit scooping and dipping, narrow necks reduce boil-off during storage;
- lid type — loose-fitting plugs allow safe venting, since a sealed lid on a non-pressurised flask is never acceptable.
💡 Why Choose REAL GAZ
- ✅ Straightforward ordering — tell us the liquid, the volume and the place of use and we will propose a suitable flask and filling schedule;
- 🧪 Matched accessories — pouring funnels, cryogenic gloves, face shields and carrying cases can be supplied with the flask;
- 🎯 Safe liquid supply — refills of liquid nitrogen, argon and oxygen are available so the flask never stands empty;
- 🔒 Documented handling — every delivery carries clear instructions for venting, storage and safe transfer;
- 📄 Certificate of Analysis (CoA) — supplied with every order.
🔬 Quality Control & Safety
- multi-stage inspection of every vessel before filling;
- vacuum and insulation performance checks;
- moisture & impurity analysis of the filled liquid;
- leak testing and pressure integrity checks.
Vessels and fillings follow ADR / UN transport rules and relevant EN/ISO standards, and users should always handle cryogenic liquids in ventilated areas.
⚙️ Trusted Gas Solutions
REAL GAZ helps customers who want to buy Dewar flasks in Azerbaijan, Turkey, Georgia, Uzbekistan and the USA, combining the vessel, the liquid and the safety guidance in one supply relationship. Whether you need a single flask for a pilot project or a fleet for a production line, our team can plan the order.
REAL GAZ — the flask, the liquid and the know-how in one place.