Dewar Tanks for Cryogenic Liquids

Minnuo’s DPL and DPW series cryogenic Dewar tanks are vacuum-insulated stainless steel containers, ideal for storing and transporting liquid oxygen, nitrogen, and argon. Widely used in machinery, medical, electronics, food processing, and scientific research.

Our Industrial Dewar

DPL700-3.17

DPW650-2.5

DPL450-2.3

DPL450-2.01

DPL450-Ⅰ-1.4

DPL450-II-2.3

DPL450-1.4

DPL450-2.88

Your Trusted Supplier of Dewar Flask

Our welded adiabatic gas cylinder series features a double-layer structure with an adiabatic layer between the inner and outer cylinders, equipped with multi-layer insulating materials and maintained under high vacuum.

We have compiled a comprehensive set of product parameters to help you easily compare our various Dewar tank models.

Dewar Flask Specifications: Unveiling the Technical Details of Our Cryogenic Storage Solutions

Product Specification		DPL450-175/195/ 210-1.4	DPL450-175/195/ 210-2.01	DPL450-175/195/ 210-2.3	DPL450-175/195/ 210-2.88	DPL700-410/450/ 500-3.17	DPW650-410/450/ 500-2.5	DPL450-80/100/110/ 120-1.4	DPL450-80/100/110/ 120-2.3
Nominal volume / effective volume (L)		(175/166)(195/185)(210/199)				(410/377)(450/414)(500/460)		(80/76)(100/95)(110/104)(120/114)
Working medium		Liquid Oxygen, Liquid Nitrogen, Liquid Argon, Carbon Dioxide, Nitrous Oxide
Working pressure MPa		1.4	2.01	2.3	2.88	3.17	2.5	1.4	2.3
Minimum working temperature ℃		-196
Tightness test pressure MPa		1.4	2.01	2.3	2.88	3.17	2.5	1.4	2.3
Safety valve opening pressure setting MPa(≤)		1.59	2.41	2.76	3.45	3.45	2.76	1.59	2.76
Rupture disc burst pressure setting MPa(≤)		2.6	3.6	3.6	5.17	5.17	3.9	2.6	3.6
Static evaporation rate %/d (liquid nitrogen)		2.41	2.41	2.41	2.5	1.9	2.5	3.16	2.41
Empty weight of container (KG)		109/116/121	125/133/140	132/140/147	143/155/162	395/417/444	364/380/400	70/79/84/88	83/93/108/113
Overall dimension （mm）		Φ516×1510/1625/1715				φ766×1535/1640、1765	φ711.2×1558/ 1678/1830	Φ516×930/1050/1110/1170
Frame size （mm）		650×650×1520/1630/1720(Belt wheel +135)				880×880×/1780	740×1008×1862	/
Frame size （mm）		650×650×1520/1630/1720(Belt wheel +135)				/1890	/1982/2130	/
Maximum filling capacity （KG）	Volume	175/195/210	175/195/210	175/195/210	175/195/210	410/450/500	410/450/500	80/100/110/120	80/100/110/120
	Liquid Oxygen	147/164/177	133/152/163	131/146/157	121/135/146	285/313/348	308/338/376	67/84/92/101	60/75/82/90
	Liquid Nitrogen	98/109/117	85/95/102	79/88/94	63/70/76	148/163/181	185/203/226	44/56/61/67	36/45/49/54
	Liquid Argon	180/200/215	165/184/198	159/177/191	146/163/176	344/377/420	374/410/456	82/103/112/123	73/91/100/109
	Liquid Carbon Dioxide	/	159/177/190	157/175/189	150/167/180	352/386/430	369/406/451	/	72/90/98/108
	Liquid Nitrous Oxide	/	151/169/182	150/167/180	143/160/172	336/369/410	352/387/430	/	68/86/94/103

The Complete Buyer’s Guide to liquid nitrogen cylinder

Embrace the future of gas storage with our innovative Dewar Tanks – designed for unmatched safety, efficiency, and reliability across industrial, medical, and other applications.

Why Choose Our Liquid Nitrogen Tank?

Advanced Technology:Engineered for precise temperature control and pressure management to keep gases at optimal conditions for extended periods.
Cost-Effective:Reduce the need for frequent refills, enhancing operational efficiency.
Versatile Applications:Ideal for industrial, medical, and scientific use.

Ready to Make the Right Choice?

Whether you’re looking to import or purchase Dewar Tanks for your project or wholesale distribution, our comprehensive guide provides all the information you need to make an informed decision.

Safety Guidelines for Dewar Tanks Operation

Maintain Air Circulation

Nitrogen and argon leaks can dilute oxygen in the air, leading to severe health risks, including shock or death. Always ensure proper ventilation in work areas.

Handling Liquid Oxygen

When using liquid oxygen, use compatible equipment and keep it clean to avoid accidents. Improper handling can cause serious damage to the cylinder and injuries.

Deep Cold Conditions

Cryogenic liquids can harm the human body. Always use eye and skin protection, such as safety goggles, face shields, long sleeves, and easy-to-remove gloves. Cryogenic liquids are extremely cold, at temperatures below -184°C.

Pressure Hazard

Our containers are pressure vessels. Always ensure pressure is fully relieved before maintenance. Cold gas or liquid release can cause injuries.

Special Caution

Install safety valves in cryogenic liquid lines. Use appropriate safety measures to prevent gas expansion, which can rupture hoses or lines.

Unlock the Science Behind the DPL Series: A Deep Dive into Operational Principles

Our DPL series Dewar tanks come in various sizes, capable of storing different liquid volumes and providing both liquid and gas outputs. Below, we break down their operational principles, complemented by a schematic workflow to showcase key components and processes.

Pressure Build-Up Process

When the pressurizing valve is opened, the internal pressurizing circuit is activated. Gravity causes the cryogenic liquid to flow into the pressurizing coil, where it vaporizes through heat exchange with the inner wall. This vaporized gas is then directed into the gas-phase space, creating the container's internal driving pressure.

Gas Discharge Process

Opening the gas valve releases the internal pressure, pushing the cryogenic liquid out of the container. The liquid then passes through the evaporation coil, exchanging heat with the outer shell, vaporizing into gas for use.

Liquid Discharge Process

By opening the liquid outlet valve, the internal pressure forces the cryogenic liquid through the outlet tubes.

Key Points: Regulate the pressurizing valve to control internal pressure and ensure a stable supply of gas or liquid.

Important Notes: Close the gas valve immediately after usage to prevent unnecessary liquid-to-gas conversion and resource waste. Control the gas valve’s opening to regulate gas output and extend the use of bottled cryogenic liquid.

Important Notes: Close the liquid outlet valve immediately when not in use to avoid wastage. Adjust the valve opening to control the outflow, optimizing the usage time of the cryogenic liquid.

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1. Quality Assurance & Free Maintenance

All our products are manufactured in strict accordance with the GB/T24159-2022 standard. Within the warranty period, we provide free online maintenance and support for any quality issues arising from design, manufacturing, or material defects. Our professional after-sales team is also available for lifetime technical consultation to ensure optimal product performance.

2. Dedicated Customer Management

We maintain a comprehensive customer management system to track product usage and gather feedback. This allows us to continuously improve our product quality and tailor our services to meet your specific needs.

3. 24/7 Customer Support Line

Our dedicated customer service line is available around the clock to provide technical advice and assistance whenever you need it. We are here to ensure your questions are answered promptly and effectively.

4. Lifetime Maintenance Services

To give you complete peace of mind, we offer lifetime maintenance services, ensuring that your equipment remains in excellent condition throughout its usage.

Our Manufacturing Strength

With a state-of-the-art manufacturing facility spanning over 10,000 square meters, we are equipped with the latest automated production lines and advanced vacuum insulation technology. Our annual production capacity exceeds 20,000 Dewar Tanks, allowing us to meet the needs of clients of all sizes.

Component Structure Diagram

The different sizes in the DPL range can store different volumes of liquids and these cylinders are capable of delivering both liquids and gases. The various properties of the cylinders are realized by the following components, and we provide you with a schematic diagram of the workflow and the location of the components:

Experience the difference with our advanced Dewar Tanks

Engineered for exceptional durability and reliability, ensuring your gas storage needs are met with precision and efficiency. Reach out now for a tailored solution that exceeds your expectations.

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