175L Pressure Maintaining Cryogenic Gas Dewar Liquid Nitrogen Transport Dewar Tank
Products Description
175L Cryogenic Dewar Tank is vertical double-wall vacuum multi-layer insulation pressure vessel, designed for storage & transport of cryogenic liquids: LOX, LIN, LAr, LCO2. Made of 304 austenitic stainless steel, built-in self-pressurizing vaporizer, dual independent safety relief protection, low evaporation loss. It supports road transport & continuous on-site gas supply for industrial gas, metallurgy welding, laser cutting, lab & medical oxygen supply. Every unit passes hydrostatic pressure test & helium leak detection.
Product Specifications
| Specifications | DPL450-175MP | DPL450-175HP | DPL450-175VHP |
|---|---|---|---|
| Geometric Volume | 175 | 175 | 175 |
| Effective Volume | 157.5 | 157.5 | 157.5 |
| D×H(mm)Size | Φ508×1496 | Φ508×1500 | Φ508×1500 |
| Working Pressure(MPa) | 1.37 | 2.05 | 2.88 |
| Set Pressure of Safety Valve(MPa) | 1.59 | 2.41 | 3.45 |
| Bursting Disc / Assistant Safety Valve(MPa) | 2.6 / 2.41 | 3.6 | 5.17 |
| Evaporation Rate(liquid nitrogen) | ≤2.1% | ≤2.1% | ≤2.1% |
| Empty Weight(kg) | ~117 | ~135 | ~156 |
| Maximum filling weight :Liquid Oxygen (kg) | ~179 | ~179 | ~179 |
| Maximum filling weight :Liquid Nitrogen (kg) | ~127 | ~127 | ~127 |
| Maximum filling weight :Liquid Argon (kg) | ~220 | ~220 | ~220 |
| Maximum filling weight :LNG (kg) | ~67 | / | / |
| Maximum filling weight :Liquid CO ₂(kg) | / | ~163 | ~163 |
| Level Gauge | Float/Capacitance | Float/Capacitance | Float/Capacitance |
| Base Style | Stainless Steel-Rubber | Stainless Steel-Rubber | Stainless Steel-Rubber |
more details
Product Features
🔹 Vacuum multi-layer insulation reduces liquid evaporation & cut operation cost
🔹 Integrated self-pressurization, simple on-site gas supply, less auxiliary equipment
🔹 Dual safety valve + burst disc overpressure protection, automatic relief
🔹 Thickened SS304 cylinder, impact resistant for site & outdoor mobile use
🔹 Standard valve manifold, easy repair & spare parts sourcing
🔹 Bottom damping ring for shock resistance during long shipment & reduce damage risk
Packaging & Shipping
1.cryogenic dewar Tank body wrapped with PE protective film to prevent scratch on stainless steel surface;
2.Valves & pressure gauges separately wrapped with bubble film against impact;
3.Optional metal transport frame (highly recommended for sea freight), fix tank upright to avoid tipping;
4.Wooden block reinforcement at bottom for container sea & land transport;
5.Shipping mark & warning labels: cryogenic pressure vessel, upright sign;
6.Keep tank upright during loading, horizontal or inverted transport forbidden to prevent vacuum failure;
7.Packing photos & packing video available before shipment for customer confirmation.
How to Select cryogenic dewar?
1.Confirm medium: LOX / LIN / LAr / LCO2, different valve assembly for different cryogenic liquid;
2.Select working pressure: standard 1.4MPa ,2.0MPa or high pressure 2.3MPa version;
3.Calculate daily gas consumption, match built-in vaporizer max output 9.2Nm³/h;
4.Destination country: TPED mandatory for EU market, PED/CE for other regions;
5.Working environment: indoor stationary supply or outdoor mobile transport;
6.Optional extras: OEM nameplate, customized valve connection, metal transport frame.
Application Scenarios
✅ Industrial gas station: on-site storage & continuous supply of LOX, LIN, LAr
✅ Laser cutting, metal welding, metallurgy heat treatment
✅ Scientific laboratory, material cryogenic test & cooling
✅ Hospital centralized oxygen supply, medical emergency oxygen system
✅ Food quick-freezing & cold chain processing
✅ Semiconductor & photovoltaic cryogenic process
✅ Mobile cryogenic gas source for mining & construction site
✅ LCO2 storage & dry ice production
After Sales Service
1.1-year full tank warranty, 3-year vacuum warranty; free repair or spare parts for manufacturing defects within warranty period;
2.7×24 online technical support, remote troubleshooting via WhatsApp / email / video call;
3.Full set English documents: operation manual, maintenance manual, material certificate, hydrostatic test report, helium leak report;
4.Long-term stock of consumable spare parts with fast delivery;
5.On-site commissioning & operator training available for large project (travel cost extra);
6.Lifetime technical consultation, paid vacuum re-evacuation & maintenance after warranty expired.
why choose us?
1.Direct manufacturer with 24 years cryogenic pressure vessel manufacturing experience, no middleman markup;
2.Own workshop, traceable raw materials, OEM nameplate & pipeline customization available;
3.FAT factory acceptance test available, customer witness inspection on request;
4.Professional export document team, quickly prepare CIQ, material certificate, test report & shipping documents;
5.Global technical support, remote video guidance for commissioning & troubleshooting;
6.Spare parts in stock, fast delivery for valves, pressure gauges & safety relief components.
Common Troubleshooting about Dewar Flask
| Symptom | Root Cause | Solution |
|---|---|---|
| Heavy frost on outer shell, high evaporation | Vacuum loss | Stop filling, return factory for vacuum re-evacuation |
| Pressure rising continuously, safety valve pops frequently | Faulty pressure building valve / high ambient temp | Close pressurizing valve, cool down, inspect manifold |
| Insufficient gas output | Pipeline blockage / low regulator setting | Clean pipeline, reset pressure regulator |
| No reading on pressure gauge | Broken gauge / valve closed | Replace gauge, check valve status |
| Frost & leakage at valve joint | Aging gasket | Depressurize tank, replace gasket |
FAQ
Q: Can we do OEM with our logo?
A: OEM nameplate, logo printing & tank marking available.
Q: Can we ship the cryogenic dewar tank lying horizontally?
A: Forbidden to lay or invert, vacuum will be damaged and cause high evaporation loss.
Q: How to check vacuum condition after receiving cryogenic cylinder?
A: Keep static for 24h, fill LIN and check frost on outer shell. Heavy frost means vacuum failure.
Q: How often should safety valve be calibrated?
A: Annual calibration recommended, comply with pressure vessel safety regulation.
Q: Can you supply operation manual & operation video?
A: English operation manual, maintenance manual & training video provided.
Q: Do you supply spare parts for cryogenic dewar tank?
A: Spare parts including safety valve, gauge, valve & gaskets in stock for separate sale.
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