Nitrogen-Swagelok® Feedthroughs are specialized Liquid Nitrogen Feedthroughs used for the same cooling purposes as Water Feedthroughs, but with much lower temperature capabilities (-200°C) for greater cooling rates. These feedthroughs are designed to minimize heat transfer between coolant lines and vacuum mounts, ensuring system stability and performance.

To prevent ice build-up, which can compromise sealing, these feedthroughs incorporate a double wall coaxial construction. A 0.25 inch (6.35 mm) cooling line is welded into one end of a 0.5 inch (12.7 mm) support tube. The opposite end is welded to the vacuum mount, creating a coaxial vacuum cavity that acts as an effective thermal barrier, eliminating condensation on the air side of the mount.

Liquid Nitrogen Feedthroughs are available in Del-Seal CF, ISO NW Kwik-Flange, and 1 inch (25.4 mm) Base Plate mount styles. ISI also offers liquid feedthrough tube kits for direct welding into chambers or custom flanges.

Constructed with 0.25 inch (6.35 mm) type 304 stainless steel tubing, the Swagelok® feedthrough variant provides secure 0.25 inch (6.35 mm) Swagelok® compression fittings, ensuring a reliable, leak-free seal and flexible integration into vacuum systems.

Industry Applications

Nitrogen-Swagelok® Feedthroughs are ideal for industries requiring cryogenic cooling and vacuum integrity. They are widely used in semiconductor manufacturing, superconductivity experiments, particle accelerators, cryogenic testing, aerospace thermal management, and advanced research laboratories. Their ability to combine ultra-low temperature operation with reliable sealing ensures dependable performance in both scientific and industrial high-vacuum applications.