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Heat Pipe Production

Heat Pipe Production

Heat pipes are thermal devices that work based on a two-phase heat transfer. The pipe is filled with a liquid (commonly water) to transfer the heat from one side of the pipe to the other. They are typically used to transfer heat from a hot electronic component (e.g., a computer processor) to a cold area where the heat can be released.
After partially charging the heat pipe with water, the residual volume is evacuated, ensuring that the subsequently sealed pipe is filled with only water and water vapor.

The challenge for the vacuum pump is that it must have the ability to handle water vapor and often water droplets. As manufacturers also target the lowest pressures, the pumps are often operated with a closed gas ballast valve which can create water condensation inside the pumps.

Leybold offers several oil-sealed, two-stage TRIVAC rotary vane pumps for this market. However, due to high process robustness, more and more factories equip their production lines with the VARODRY, our air-cooled screw pump. This pump can handle emitted water and achieve the lowest pressures even with closed gas ballasts.