Pressure Vessel
Your Professional Pressure Vessel Supplier
Zoiun Fluid & Gas Equipment Co., Ltd. was founded in 2016, a high-tech company specialized in designing and manufacturing heat exchanger for the storage, transport, pressurization, and vaporization of cryo liquids and gases. Our core products include various types of cryogenic pumps and vaporizers, as well as pressure vessels such as cryogenic liquid cylinders, cryogenic tanks and micro-bulk tanks.
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Cryogenic Dewar
Zoiun Fluid & Gas Equipment is a pressure vessel manufacturer specializing in ambient vaporizersAdd to Inquiry -
Seamless Steel Oxygen Cylinder
40Liter 150bar seamless steel oxygen cylinders are a safe and reliable way to store and transportAdd to Inquiry -
Stainless Steel LN2 Dewar
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Why Choose Us
Strict Quality Control
We implement a multi-level quality management system, meticulously overseeing every step from raw material procurement to the production process, ensuring that every piece of equipment meets the highest standards.
Global Sales
Our products are highly popular and are sold to many countries and regions worldwide. We also provide one-stop equipment solutions, which do not require on-site construction and reduce time costs.
Get Discount on Bulk Orders
We also provide further discounts for large quantity orders. In the event that you cannot find the cryogenic equipment you need on our website, we are more than happy to source promotional pricing through our sister companies to ensure that your needs are met.
Custom Services
Our products are highly flexible and can be custom-made to meet specific customer requirements. This allows us to continuously update and expand our product line, ensuring we can meet a wide range of needs and provide tailored solutions for our clients.
Types of Pressure Vessel
The Pressure Vessel Produced by Our Company Mainly Include the Following Types:
Cryogenic Dewar
A cryogenic dewar is a highly insulated vessel for storing, transporting, and applying cryogenic liquids at extremely low temperatures.
Seamless Steel Oxygen Cylinder
Seamless steel oxygen cylinders are a safe and reliable way to store and transport oxygen gas. The cylinders are also tested and certified to meet international safety standards.
Stainless Steel LN2 Dewar
The Stainless Steel LN2 Dewar is a high-performance container designed specifically for the storage of liquid nitrogen (often abbreviated as LN2).
Cryogenic Dewar Specification
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Model |
175L Cryogenic Dewar |
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Nominal Capacity |
175L |
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Usable Capacity |
164L |
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Pressure |
2.3MPA |
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Net Weight |
131KG |
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Dimensions |
510*1540MM |
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Liquid Level Gauge |
Float |
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Surface Treatment |
Polish |
Material of Cryogenic Dewar
Cryogenic dewars come in a variety of shapes and sizes, and also from a variety of materials. The exterior of a Dewar is typically made of stainless steel, and the interior is made of stainless steel or aluminum for strength and corrosion resistance. Between the inner and outer walls, a high vacuum layer is maintained, often combined with multi-layer insulation made of reflective materials like aluminized Mylar, to minimize heat transfer.
Advantages of Cryogenic Dewar
Efficiency
Cryogenic dewar are designed for ease of use, with features like self-pressurization and portability to ensure consistent performance.
Cost-effectiveness
Their insulation properties reduce evaporation losses, maximizing the usage of stored cryogenic liquids.
Safety
Modern designs prioritize safety with built-in pressure-relief valves, ensuring that operators can use them without risk.
Versatility
Cryogenic dewars cater to a wide range of industries, making them a flexible solution for diverse applications.
Application of Cryogenic Dewar
Medicals
Preserving biological samples, powering cryotherapy treatments, and even storing organs for transplantation.
Industrial Gases
Safely storing and transporting liquefied gases like oxygen, nitrogen, and argon for various industrial processes like metal cutting and food freezing.
Space Exploration
Fueling rockets and spacecraft, and keeping astronaut life support systems operational.
Scientific Research
Conducting experiments at extreme temperatures, studying material properties under cryogenic conditions, and facilitating microscopy of tiny structures.

Cryogenic Dewar Safety and Handling Advices
Containers must always be stored in a well-ventilated area.
Information and caution labels must be installed in order to inform users of potential hazards.
Technicians must wear the recommended PPE at all times when handling and filling the container, in order to minimize risks.
Valve connections must be installed specifically to meet the needs for this sort of system.
Adaptors are not to be used.
The area should be a non-smoking one.
The installation of O2 monitors is recommended.
Valves must be opened slowly.
Seamless Steel Oxygen Cylinder Specification
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40Liter 150bar seamless steel oxygen cylinders |
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Material |
37Mn |
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Water Capacity |
40L |
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Working Pressure |
150BAR |
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Cylinder Height |
1305mm |
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Empty Weight |
47.8Kg |
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Wall Thickness |
6.1mm |
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Outside Diameter |
219mm |
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Head Protection |
Tulip Cap, Common Cap. |
High strength: Due to the use of seamless steel pipe material for manufacturing, seamless steel oxygen cylinders have very high strength and load-bearing capacity.
Strong corrosion resistance: The surface of seamless steel oxygen cylinders has undergone special treatment and has good corrosion resistance.
Good sealing performance
Seamless steel Oxygen cylinders have few joints or even no welds, so they have good sealing performance.
Lightweight and compact
Compared to oxygen cylinders made of other materials, seamless steel Oxygen cylinders have the characteristics of being lighter and more compact.
Good high-temperature resistance
Seamless steel oxygen cylinders can work normally at high temperatures without deformation or material failure. This allows it to safely transport and store gases under some high-temperature conditions.

Healthcare: Used for storing medical oxygen, where reliability and purity are critical. Seamless steel oxygen cylinders ensure consistent performance and reduce contamination risks.
Industrial Manufacturing: Employed in welding, cutting, and inert gas shielding processes requiring high-pressure gas delivery with minimal maintenance.
Aquaculture: Provides oxygen to fish farms and wastewater treatment systems to enhance oxygen levels and promote healthy biological activity.
Culinary & Food Preservation: The food and beverage industry relies heavily on seamless steel oxygen cylinders for preservation, packaging, and beverage carbonation.
Chemical and Petrochemical Industry: Supplies oxygen for oxidation reactions, chemical synthesis, and refining processes that require controlled oxygen environments.
Seamless Steel Oxygen Cylinder Manufacturing Process
Raw Material Selection
The construction of a seamless steel oxygen cylinder starts with selecting high-quality steel. The steel must meet strict requirements for strength, flexibility, and resistance to corrosion.
Piercing and Extrusion Process
The manufacturing process for seamless steel oxygen cylinders begins with a solid billet of steel, which is heated to a malleable state. The billet is then pierced to create a hollow tube. This piercing step is followed by extrusion, where the hollow tube is elongated into the desired shape of the cylinder.
Rotary Forging and Stretching
Once the hollow tube is formed, it undergoes rotary forging. This process involves rotating the tube while applying pressure to stretch it to the correct diameter and wall thickness.
Heat Treatment and Annealing
The oxygen cylinder then undergoes heat treatment, specifically annealing, which involves heating the steel to a high temperature and then cooling it gradually. This process enhances the material’s strength, ductility, and resistance to fatigue.
Surface Finishing and Coating
After the seamless steel oxygen cylinder is formed and heat-treated, it is carefully inspected for quality and surface imperfections. The seamless steel oxygen cylinder may then undergo various finishing processes such as shot blasting, polishing, or sandblasting to smooth out the exterior.
Testing and Quality Assurance
Before the seamless steel oxygen cylinders are put into service, they undergo rigorous testing to ensure they can safely handle the pressures they will be subjected to. Common tests include:
Hydrostatic Pressure Testing
The oxygen cylinder is filled with water and pressurized to check for leaks and structural weaknesses.
Pneumatic Testing
The oxygen cylinder is pressurized with air and examined for any signs of leakage.
Non-Destructive Testing (NDT)
Techniques such as ultrasonic or X-ray testing are used to detect any internal cracks or faults.
How to Place an Order
You can place your order directly by phone at +44 75487 21135 or contact us by email at contact@zoiun.com.
Our technicians will quote according to your needs.
After everything is confirmed, we will sign a contract with you to confirm your approval of the product requirements and quality and your payment of the deposit.
After confirming and receiving the 30% advance payment, we will start mass production.
Our technicians will control the quality during the production process.
According to the delivery time, we will arrange shipment after receiving the remaining payment.
Packing & Delivery
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Lead Time |
Equipment production normally takes 10-20 days depending on available inventory. |
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Packaging |
Vaporizers are transported in wooden crates, which serve as protective packaging during shipment, especially in cases where multiple manufacturers' products are consolidated in a single container for Less than Container Load (LCL) shipments. |
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Payment Terms |
30% deposit in advance, 70% balance against the copy of B/L. T/T, Trade Assurance, Paypal, Western Union, Credit Card, L/C etc. |
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Warranty |
18 Month |
FAQ
We're well-known as one of the leading pressure vessel manufacturers and suppliers in China. Please rest assured to buy cheap pressure vessel from our factory. All custom made products are with high quality and competitive price.
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