Large quantities of liquid gases are needed to cover the daily demand for technical gases and the associated energy requirements. A large demand exists especially for Liquefied Natural Gas (short: LNG). But how is LNG actually produced and where is vacuum needed?

Application requirements

  • Short response time of the leak detector
  • High leak tightness

How does it work?
In gas liquefaction, gases are converted from the gaseous to the liquid state , which allows much higher amounts of energy to be transported or stored. In liquefied natural gas (LNG) production, vacuum solutions are used in several production steps. Insulated containers are also used here to liquefy and transport gases. Heat exchangers play a decisive role in the liquefaction of natural gas and require the highest degree of tightness. In this application, heat exchangers work according to the countercurrent principle. The circulating gas transfers its heat to the countercurrent current with a continuous flow and is thus cooled down to a transport temperature of about - 160 °C.

Product portfolio
Pfeiffer Vacuum offers a broad product portfolio for the liquefaction process. To assure the operability of heat exchangers, Roots pumping stations as well as fast-response leak detectors and their accessories are employed in the manufacturing process.

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