Dewar Bottle Product Introduction

Dewar Bottle Product Introduction

A Dewar bottle (also known as a Dewar flask) is a specialized container designed for long-term storage and transportation of cryogenic liquids (e.g., liquid nitrogen, oxygen, argon, or carbon dioxide) at extremely low temperatures (down to -196°C). Leveraging vacuum insulation technology, it minimizes heat transfer, ensuring exceptional thermal efficiency and safety. Below is a comprehensive overview of its features, applications, and technical specifications.

Core Design & Technology

Vacuum Insulation

Double-walled stainless steel construction: The inner and outer shells are separated by a high-vacuum layer (≤5×10⁻³ Pa), which reduces heat loss through conduction and convection.

Multi-layer Insulation (MLI): The inner tank is wrapped with aluminum-coated polyimide films, which reflect 99.8% of radiant heat.

Support structure: Stainless steel brackets secure the inner tank while minimizing thermal bridges.

Safety Features

Pressure relief system: Equipped with a safety valve (e.g., activating at 2.3MPa for models with a 2.0MPa working pressure) and a rupture disk (burst pressure ≥3.6MPa) to prevent over-pressurization.

Thermal shock resistance: Manufactured from materials such as 304/316 stainless steel or aluminum alloy, ensuring durability under extreme temperature conditions.

Compliance with international standards: Certified to CE, ASME BPVC VIII, and EN 1251, meeting safety requirements for industrial and medical applications.

Smart Technology (2025 Models)

IoT-enabled monitoring: Real-time tracking of temperature, pressure, and liquid level via Bluetooth or Wi-Fi.

LCD touchscreen: Displays key parameters and issues alerts for low liquid levels or abnormal pressure.

Automatic supply system: Integrated vaporizer and supercharger convert liquid to gas and maintain stable pressure.

Key Specifications

Parameter	Range/Details
Capacity	1L to 500L (laboratory-grade to industrial-scale), e.g., 499L for CO₂ storage
Working Pressure	1.38MPa to 3.45MPa (medium-pressure range); for example, Model 360-2.0 is rated at 2.0MPa
Temperature Range	-200°C to +120°C, suitable for both cryogens and high-temperature gases
Evaporation Rate	≤0.1%/day (liquid nitrogen, laboratory models) to ≤2.1%/day (industrial models)
Weight	2.8kg (2L laboratory model) to 429kg (499L industrial model)
Dimensions	Varies by capacity (e.g., 2045×750×1035mm for the 499L horizontal model)

Applications

Medical & Biotechnology

Cryopreservation of stem cells, vaccines, and embryos at -196°C.

Portable oxygen supply for hospitals and emergency medical services.

Industrial & Energy

Storage and transportation of liquefied natural gas (LNG) and industrial gases.

Semiconductor manufacturing: Provision of ultra-pure gases for cleanroom environments.

Scientific Research

Superconducting experiments using liquid helium (4.2K).

Cryogenic temperature testing of materials (e.g., aerospace components).

Food & Beverage

Rapid freezing of seafood, meats, and desserts using liquid nitrogen.

Temperature-controlled storage of wine and beer.

Aerospace & Defense

Storage of rocket propellants (liquid oxygen/liquid hydrogen) for launch vehicles.

Product Models & Pricing

Laboratory-Grade:

DILVAC Stainless Steel Cased Dewar: 1L to 7L capacity, 24–90 hours of hold time, priced at 120–280.

WIGGENS C/G-C Series: Borosilicate glass inner tank with metal casing, ideal for small-sample storage.

Industrial-Grade:

SIDA W499 Horizontal CO₂ Dewar: 499L capacity, equipped with casters for mobility, priced at 2,500–5,000.

CHART MVE DC230LP: 230L self-pressurized model, equivalent to 18 high-pressure cylinders, starting at $1,000.

Smart Models:

BD02 Visual Dewar Bottle: Features a transparent observation window and IoT integration, priced at ¥2,000–¥20,000 (~280–2,800).

Regulatory Compliance & Maintenance

Certifications: Compliance with CE, ASME BPVC VIII, EN 1251, and GB standards ensures safety and quality.

Inspections:

Routine inspection every 3 years (for general use) or annually (for units in service for over 10 years) to conduct pressure tests and vacuum checks.

Adherence to local regulations (e.g., China’s Regulations on the Safety Management of Hazardous Chemicals for storing hazardous gases).

Trademark Note

The term "Dewar" derives from the invention by Sir James Dewar and is a generic name for vacuum-insulated containers. However, the trademark "Thermos" is owned by a third party and has no connection to the original inventor.

Why Choose a Dewar Bottle?

Unmatched Thermal Efficiency: Vacuum insulation reduces evaporation loss, lowering costs associated with cryogenic refills.

Versatility: Suitable for storing gases, liquids, and solids (e.g., dry ice).

Durability: Built to withstand extreme temperatures and rough handling.

Safety: Multiple pressure relief mechanisms and robust materials minimize operational risks.

For customized solutions or bulk orders, leading manufacturers such as Kansal Industrial Gases, Chart Industries, and Xinxiang LN Special Equipment offer tailored designs for specific applications.

（注：文档部分内容可能由 AI 生成）