1. Specialty Seal Group (SSG) ceramic-to-metal and glass-to-metal seals give top performance in the harshest environments.

    Whether you need industrial heaters, power cables, or other high heat or power sources to operate with maximum efficiency, SSG has a custom or standard solution that’s ideal.

    All SSG seals are vacuum-tight and offer the necessary resistance to heat, abrasion, chemicals, oil, grease, moisture, toxic fumes and more.

    We attach metals to seals through a variety of brazing and soldering techniques which we use based on your specific application.

    Ceramic to metal seal

  2. Ceramic Selection

    The Right Ceramic for Your Particular Application

    If you need hermetic seals for specific applications, the technical information, guidelines and tips throughout the next several pages will help you select seal designs that are most efficient and competitively-priced. These data have been derived from the experiences of Specialty Seal Group engineering and production staff over more than 50 years of service to customers in a wide variety of industries.

    After you have worked with us to establish the parameters for your seals, Specialty Seal Group’s state-of-the art capabilities in CAD design, CNC machining, sealing technology, mass spectrometer leak testing, and plating finishes will yield accurate, cost-effective results.

    Cost vs. Alumina Content

    As a rule, ceramic cost increases as the purity of raw Al2O3 increases. Specialty Seal Group excels at providing the strongest ceramic-to-metal seals and metalized ceramics with the lowest cost per alumina content possible.

    Typically, 92-96% of Al2O3 ceramics prepared with Specialty Seal Group’s proprietary metallization process provide high performance where reliability and strength are critical. In addition, Specialty Seal Group ceramics promote increased thermal conductivity, chemical resistance and dielectric strength. H2SO4 and HCl, for examples, will not attack a ceramic, eliminating the probability of corrosion in a number of applications.

    Those factors, along with alumina’s high temperature tolerance and high compressive strengths, make it the ceramic material of choice.

    Selecting the Best Metal for Your Application

    Choosing the type of metal to combine with either ceramic or glass components in a hermetic seal involves factors such as temperature, pressure, magnetism, atmosphere and size. All of those variables influence the design and production of any ceramic-to-metal seal or glass-to-metal seal. At SSG, our technology incorporates these metals in our seals:

    • Copper
    • Nickel
    • Monel
    • Nickel-Iron Alloys
    • Brass
    • Bronze
    • Molybdenum
    • Stainless Steel
    • Steel
    • Kovar

    Metal components can be pre-plated or post-plated.

    1. 1001 Lloyd Avenue
    2. Latrobe, PA 15650
    3. P: 724.539.1626
    4. F: 724.539.2540