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Used Dewar

  • Trusted Seller
    Bewellcn Liquid Argon Dewar

    Bewellcn Liquid Argon Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    Liquid Argon Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or DOT...

    Shanghai, China
  • Trusted Seller
    Bewellcn LNG Dewar

    Bewellcn LNG Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    LNG Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or DOT or ASME ...

    Shanghai, China
  • Trusted Seller
    Bewellcn LNG Dewar

    Bewellcn LNG Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    LNG Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or DOT or ASME ...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Oxygen Dewar

    Bewellcn Liquid Oxygen Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    Liquid Oxygen Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or DO...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Helium Dewar

    Bewellcn Liquid Helium Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    Liquid Helium Dewar 1 st Design pressure: 10Psi | Operation pressure: 8.2Psi | Leakage pressure: 8.2Psi | Test pressure: 10Psi | Full volume: 250L, 550L | Filling rate: 90% | Design temperature: -269℃ | Insulatio...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Nitrogen Dewar

    Bewellcn Liquid Nitrogen Dewar

    • Manufacturer: Bewellcn
    • Model: Liquid Nitrogen Dewar

    Liquid Nitrogen Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or ...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Nitrogen Dewar

    Bewellcn Liquid Nitrogen Dewar

    • Manufacturer: Bewellcn
    • Model: Liquid Nitrogen Dewar

    Liquid Nitrogen Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or ...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Argon Dewar

    Bewellcn Liquid Argon Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    Liquid Argon Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or DOT...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Oxygen Dewar

    Bewellcn Liquid Oxygen Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    Liquid Oxygen Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China GB or DO...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Carbon Dioxide Dewar

    Bewellcn Liquid Carbon Dioxide Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    Liquid Carbon Dioxide Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China ...

    Shanghai, China
  • Trusted Seller
    Bewellcn Liquid Carbon Dioxide Dewar

    Bewellcn Liquid Carbon Dioxide Dewar

    • Manufacturer: Bewellcn
    • Model: Dewar

    Liquid Carbon Dioxide Dewar Key Features High Vacuum Design Economizer Design Level Gauge and Pressure Gauge on all Tanks Relief Valve available from world Top brand Protect Frame as Option Certifications: China ...

    Shanghai, China

Overview

Dewar tanks are vacuum-insulated vessels used to store and transport cryogenic liquids such as liquid nitrogen, oxygen, and argon. They reduce heat transfer to maintain low temperatures for extended periods and come in portable flasks or larger stationary cylinders with various capacities and valve setups. Buyers evaluate boil-off rate, capacity, materials, pressure ratings, and transport certifications to match application and handling requirements.

FAQ

What capacity and boil-off rate should I choose?

Match capacity to your typical consumption and desired hold time. Check the boil-off rate (listed as %/day or liters/day) for acceptable loss during storage and transport.

How do I verify a Dewar's certification and inspection history?

Request test certificates, pressure and leak test records, and compliance documents (ASME, PED, DOT/UN) plus dates of last inspection and vacuum checks.

Can Dewars be shipped internationally and what regulations apply?

Yes, but cryogenic liquids are regulated. Use carriers experienced with hazardous goods, provide UN and shipping classification, and follow ADR/IMDG/IATA rules; some shipments may require special permits.

How should a Dewar be secured and handled during transport?

Use proper cradles, straps, or pallets, protect valves and gauges, keep upright, prevent tipping, and use carriers familiar with cryogenic loads. Label and paperwork must accompany the unit.

What routine maintenance does a Dewar need?

Regularly check vacuum integrity, pressure relief devices, valve seals and fittings, and monitor boil-off. Follow manufacturer service intervals and repair damaged insulation or seals promptly.