一、Features

1、Low-temperature resistant material design
A、Special materials: The impeller and casing are made of stainless steel (such as 304L, 316L) or aluminum alloy to prevent low-temperature embrittlement.
B、Low-temperature sealing: Dry Gas Seal or labyrinth seal is adopted to prevent leakage and icing.
2、High-efficiency thermal insulation structure
A、Vacuum interlayer or insulation layer: Reduce cold loss (such as polyurethane foam covering the compressor casing in LNG applications).
B、Low-temperature lubrication system: Use synthetic lubricating oil (such as polydiol type) or self-lubricating design (magnetic levitation bearings) to prevent solidification at low temperatures.
3、Adaptability to low-temperature gases
A、Anti-freezing measures: a heater or gas-liquid separator is installed at the inlet to prevent the moisture in the nitrogen from freezing.
B、Wide temperature range operation: It can work stably within the range of -196℃ (liquid nitrogen temperature) to room temperature.
4、High reliability design
A、Low-temperature rotor dynamic balance: Ensure controllable vibration during high-speed rotation (10,000 to 30,000 rpm).
B、Redundant control system: Real-time monitoring of temperature and pressure to prevent material shrinkage and failure caused by low temperatures.

二、Application field

1、Air Separation Unit (ASU) : Liquid nitrogen compression, nitrogen circulation
2、Liquefied Natural Gas (LNG) : BOG (evaporation gas) treatment, nitrogen protection system protection.
3、Chemical Engineering and Petrochemicals: Ammonia synthesis/urea, ethylene cracking
4、Semiconductors and Electronics: Wafer manufacturing, Superconducting cooling
5、Energy and Scientific Research: Liquid nitrogen energy storage, aerospace low-temperature testing
6、Food and Medicine: Freeze-drying, Cold chain Logistics
三、Advantages
1、High efficiency and energy saving: With optimized impeller and flow channel design, the isothermal efficiency can reach 75% to 85%.
2、Long service life: Low-temperature resistant materials + oil-free design.
3、Modular integration: It can be combined with cold boxes and heat exchangers to form complete sets of air separation equipment.