Specialty Dewar Flasks — custom cryogenic containers for demanding tasks
Specialty Dewar flasks are built for jobs standard containers cannot do: wide-mouth sample access, long-neck low-loss storage, transport with locking lids and integrated level gauges. REAL GAZ sources and fills these vessels for laboratories, hospitals and field teams.
Each flask is matched to the sample size, the hold time and the handling routine of your team.
Each flask is matched to the sample size, the hold time and the handling routine of your team.
Specialty vessels reference ISO 21029-1 for construction, EN 1252-1 for low-temperature materials and ISO 10286 for terminology used in documentation.
🏭 Where Specialty Dewar Flasks Are Used
- ⚙️ Biological sample transport — locking lids and canisters keep vials secure at −196 °C during courier trips;
- 🔬 Veterinary breeding — semen and embryo straws are stored and moved in wide-neck flasks;
- 🏥 Infrared detector cooling — narrow-neck flasks fill detector cold heads with minimal splash;
- 🚀 Field geology — rugged transport flasks keep cryogenic samples stable on remote expeditions.
💡 Why Choose REAL GAZ
- ✅ Customised configurations — neck width, volume and accessories are chosen to your protocol;
- 🧪 Long hold time — special insulation keeps content cold for days or weeks;
- 🎯 Secure sample handling — canisters, racks and lockable lids reduce the risk of loss;
- 🔒 Rapid replacement — spare flasks can be arranged if a vacuum fails.
- 📄 Certificate of Analysis (CoA) — supplied with every order.
📦 Handling & Storage of Specialty Dewar Flasks
- Check the liquid level with a dip rod, never by opening the lid for long periods.
- Keep lids on between uses to reduce evaporation and frost.
- Handle canisters with long forceps to avoid contact with the liquid.
- Define the sample dimensions and number of canisters before ordering, so that neck width and internal height are correct from the start.
- Ask for a hold-time figure measured with a full load, because empty-flask values can look more favourable than real use.
- Plan courier routes with a margin of extra holding time for delays at borders and depots.
- Keep a backup flask pre-cooled for emergencies, particularly where samples are irreplaceable.
- Ask for written handling instructions for every specialised accessory, so that new staff can follow the same routine every time.
🔬 Quality Control & Safety
- hold-time test on the delivered flask;
- inspection of canisters, racks and seals;
- visual vacuum-jacket check;
- product and lot labelling on every refill.
Filled flasks follow ADR / UN rules, and flasks for air transport must follow separate carrier requirements.
⚙️ Trusted Gas Solutions
Whenever a standard vessel falls short, REAL GAZ can supply specialty Dewar flasks for projects across Azerbaijan, Turkey, Georgia, Uzbekistan and the USA. Describe your task and we will recommend the flask, the cryogen and the refill plan.
REAL GAZ — specialised vessels for specialised work.