Brazing for HVAC/R Copper Tubular Components

Product Announcement from Lucas Milhaupt Global Brazing Solutions

Lucas-Milhaupt Sil-Fos® Rings for brazing copper tubular components.

  • Easy to use
  • Minimize waste
  • Provide visual verification of a complete, sound braze joint

To use:

    • Clean the areas to be brazed using a wire brush or abrasive paper
    • Insert ring into fitting and insert tube - make sure tube makes contact with ring at bottom
    • Uniformly heat of braze area - Alloy is drawn by capillary action to top of joint providing visual verification of sound braze joint

View the video to see how to use these rings and how they work!

Sil-Fos 15 Rings designed for brazing copper tubular components for HVAC/R installation applications. The Sil-Fos rings use a calculated alloy volume for use with standard size copper tube from 1/4 inch to 1-1/8 inch. The advantage of using these rings is consistent and repeatable joint quality while controlling alloy usage. Braze rings are easy to use, minimize waste, and provide visual verification of a complete, sound braze joint.

There are a few easy steps to this application: Clean the areas to be brazed; insert the ring into the fitting, the tube is inserted to seat the ring at the bottom; uniformly apply heat, and upon melting, the filler metal is drawn through the joint via capillary to the exterior surface. A witness line of alloy at the exterior joint assures that complete alloy penetration has been successfully completed. To view this step-by-step, visit our video page at:

The Sil-Fos 15 Rings are available in pre-packaged quantities for HVAC/R contractors, installers, and technicians. For additional information on the Lucas-Milhaupt, Inc. Sil-Fos Rings please call the Lucas-Milhaupt Sales Department at 1-800-521-5490 or visit our website at

Lucas-Milhaupt, Inc., a Handy & Harman Company, is one of the world's leading suppliers of brazing and soldering materials to the electrical/electronic, appliance, transportation, construction and mining markets worldwide.