Liquid Nitrogen pump
A cryogenic pump is a specialized pump designed to handle and transfer cryogenic fluids at extremely low temperatures, typically below -150°C (-238°F). These fluids include liquid nitrogen (LN2), liquid oxygen (LOX), liquid helium (LHe), and liquefied natural gas (LNG).
DSW, based in China, is a leading manufacturer of cryogenic equipment, including cryogenic pumps and turbo-expanders, serving customers worldwide. We offer a wide range of pumps for applications such as LNG handling, industrial gas transfer, and cooling superconducting magnets.
Main Technical Parameters:
| Working Pressure | 35–150 MPa |
| Flow Rate | 100 L/H – 10,000 L/H |
| Operating Conditions | Hydrogen gas buffer, offshore platform compatible |
DSW cryogenic pumps are engineered for high efficiency, durability, and reliable performance under extreme conditions.
Types of Cryogenic Pumps
Cryogenic pumps are available in several types, each optimized for specific applications:
1. Turbomolecular Pumps
Turbomolecular pumps use high-speed rotating blades to generate high-velocity gas flow. They efficiently pump clean, dry gases at low pressures and are commonly used in high-vacuum applications.
2. Leybold Cryogenic Pumps (Cryosorption Pumps)
Leybold cryogenic pumps operate by adsorbing gases onto a cold surface. They are ideal for pumping noble gases and hydrogen in cryogenic systems.
3. Mechanical Cryogenic Pumps
These pumps use mechanical mechanisms such as pistons or diaphragms to compress gases. They are widely applied in systems requiring gas liquefaction at cryogenic temperatures.
4. Centrifugal Cryogenic Pumps
Centrifugal pumps employ centrifugal force to transfer cryogenic fluids. They are suitable for continuous flow applications, such as large-scale industrial processes and LNG systems.
Features
Low Temperature: LN2 pumps are designed to operate in icy environments. They are constructed with materials and components that withstand low temperatures without embrittlement or other adverse effects.
Thermal Insulation: Cryogenic pumps often incorporate thermal insulation to minimize heat transfer from the surrounding environment. This insulation helps maintain the low temperature of the pumped cryogenic fluid and prevents excessive heat gain.
Specialized Sealing: Cryogenic liquid pumps utilize technical sealing mechanisms to seal the pump effectively and prevent leaks or loss of cryogenic fluids. These seals are designed to accommodate low temperatures and prevent the ingress of ambient air, which could cause vaporization or icing.
Cryogenic Fluid Compatibility: Cryogenic pumps are designed to handle specific cryogenic fluids, and the materials used in their construction are chosen to be compatible with those fluids. This ensures that the pump components do not react with or become damaged by the pump’s cryogenic fluids.
Pumping Mechanisms: Cryogenic liquid pumps can employ various pumping mechanisms, including centrifugal pumps, reciprocating pumps, or turbomolecular pumps, depending on the specific application and requirements. These pumps are designed to handle the unique properties of cryogenic fluids, such as low viscosity and high density.
Safety Considerations: Cryogenic pumps require special safety measures due to the extreme cold and potential hazards of cryogenic fluids. These measures may include safety interlocks, pressure relief systems, and proper handling procedures to ensure the safe operation of the pump.
Applications
Cryogenic pumps are utilized in a wide range of industries:
- Aerospace: Fuel supply for cryogenic rocket engines and cooling superconducting magnets.
- Medical & Research: Transferring liquid nitrogen or helium for laboratories, hospitals, and scientific experiments.
- Energy & Industry: Large-scale LNG transfer, industrial gas handling, and cold storage operations.
Their design is tailored to meet the unique challenges of transferring fluids at ultra-low temperatures safely and efficiently.
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