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What kind of equipment it?
"Quick Easy Cold" is a mobile, self-pressurized small low-temperature storage tank, mainly used for the storage and supply of liquid nitrogen (LN₂), liquid oxygen (LOX), liquid argon (LAr) and other media.
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What material is the container made of?
Inner S30408 / outer Q345R
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How many years is the warranty valid?
3 years for vacuum warranty, 1 year for valve accessories.
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How long will it take to complete the project?
10-45 days.
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What is the main danger of operating the Dewar bottle? How to prevent it?
The main dangers are frostbite and suffocation.
· Frostbite prevention: Be sure to wear antifreeze gloves and goggles to avoid direct contact with low-temperature liquids or metal surfaces.
· Suffocation prevention: Make sure to operate in a well-ventilated area, because the evaporated nitrogen will replace oxygen, and there is a risk of hypoxia in a closed space.
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Will the Dewar bottle explode?
With proper use and maintenance, the Dewar bottle is extremely safe.
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Is it normal for the outer wall of the Dewar bottle to frost?
It is necessary to distinguish the situation:
· Slight frosting/lower end frosting: For newly filled Dewar bottles or when the ambient humidity is high, it is normal to have slight frosting near the neck tube or at the bottom of the bottle.
· Severe frosting in a large area: If there is thick and uniform frosting in the whole bottle, especially the upper half, this is usually a sign of vacuum failure, indicating that the insulation performance has seriously decreased. Use should be stopped immediately and the supplier should be contacted.
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What should I pay attention to in the daily maintenance of the Dewar bottle?
· Keep clean: Clean the outer wall regularly to prevent dust from blocking the exhaust pores.
· Check the vacuum: touch the bottle regularly to confirm that there is no abnormal large-area frosting.
· Cover the bottle cap: Even if the bottle is empty, the bottle cap should be closed to prevent impurities and moisture from entering, resulting in freezing inside.
· Anti-corrosion: Avoid storing in a corrosive chemical environment.
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How to carry and move the Dewar bottle?
· Short distance: Use a special trolley and make sure that the Dewar bottle is fixed in the car.
· When moving: Be sure to keep the Dewar bottle upright, and it is strictly forbidden to dump, roll or put it horizontally.
· Going up and down the stairs: It must be operated by two people, using a special carrying rack or trolley, and never carrying it alone.
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Will a liquid nitrogen tank explode?
Liquid nitrogen itself is non-flammable and non-explosive. However, if the tank is hermetically sealed or its pressure relief valve fails, the liquid nitrogen will vaporize and expand to about 700 times its original volume. This pressure buildup can cause the tank to rupture. Always use certified containers with functional pressure relief devices and never seal the tank mouth.
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What are the dangers of contact? How to protect?
Liquid nitrogen is extremely cold (-196°C / -321°F). Skin contact can cause severe cold burns or frostbite. Always wear appropriate Personal Protective Equipment (PPE), including cryogenic gloves, safety goggles/face shield, a long-sleeved lab coat, and pants that cover your ankles.
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How to fill liquid nitrogen correctly?
Pre-cooling (New/Idle Tanks): For new or long-unused tanks, first slowly add a small amount of LN2 (about 1/10 of capacity) to pre-cool the inner tank. Wait until the boiling subsides before filling completely.- Slow Filling: Use a dedicated funnel and pour slowly along the inner wall to prevent splashing.- Fill Limit: Do not fill beyond 80%-90% of total capacity, and ensure the liquid level does not touch the neck tube. Sufficient space must be left for liquid expansion and gas evaporation.
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What should I note when accessing samples?
Quick Operation: Minimize lid-open time, ideally under 30 seconds per access, to reduce nitrogen loss and temperature fluctuation.- Gentle Handling: Use baskets to raise/lower samples steadily. After removal, pause briefly to let residual LN2 drip off.
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What is a tube trailer?
A tube trailer is a type of mobile pressure vessel unit used for transporting high-pressure gases (e.g., Compressed Natural Gas - CNG, hydrogen). It consists of multiple large-capacity seamless steel cylinders (the tube bundle) fixed onto a trailer chassis.
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What are the main application scenarios for tube trailers?
They are primarily used to transport CNG or hydrogen to urban refueling stations, supply industrial gases to remote factories without pipeline coverage, and serve as a feedstock source for hydrogenation reactions in the petrochemical industry.
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What is the basic operation procedure for a tube trailer?
The basic procedure involves three steps: 1. Preparation: Position the vehicle, secure it with chocks, connect static grounding, and perform safety checks. 2. Unloading/Loading: Connect hoses, open/close valves in sequence, and control pressure. 3. Completion: Depressurize, disconnect hoses, remove grounding, and guide the vehicle away.
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What are the most critical safety requirements during operation?
Critical requirements include: Preventing vehicle movement (using anti-roll devices and support blocks); Effective static grounding (connecting to both the vehicle body and cylinders separately); Proper valve operation (standing to the side and opening slowly); Strictly avoiding pressurized operations (ensuring hoses are depressurized before disconnection); and Pressure monitoring.
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What is a cryogenic valve?
It generally refers to a valve designed to operate at temperatures below -40°C (-40°F), used to control the flow of extremely low-temperature media such as LNG, liquid nitrogen, and liquid oxygen.
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Why can't standard valves be used as replacements for cryogenic valves?
It is strictly prohibited. Materials of standard valves become brittle at low temperatures, leading to catastrophic failure; their seals will harden and fail; and without a pressure relief design, trapped liquid vaporizing in the body cavity can cause overpressure and explosion.
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What materials are primarily used for cryogenic valves?
Primary materials include Austenitic Stainless Steel (e.g., 304L, 316L), Low-Temperature Carbon Steel (LF2), and special alloys like Monel and Inconel. Sealing surfaces are often hard-faced with Stellite.
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