For the healthcare industry, we custom design and manufacture a unique line of medical equipment titanium seals. HST specializes in manufacturing glass-to-metal seals for lithium batteries used in medical implantable devices such as pacemakers, heart defibrillators, drug-delivery systems, portable diagnostic equipment, and pumps. Unlike conventional glass sealing processes, our manufacturing process does not involve chemical oxide removal processes. Our production processes are also free from the carburization process that weakens the corrosion resistant capabilities of the seal’s housing. With clean seal technology, we make ready-to-install glass seals that do not require any post machining.

We efficiently seal stainless steel as well as titanium housings with a variety of pins and glass combinations. Pins for your electrical feedthrus for critical medical equipment can be manufactured from molybdenum, stainless steel, and platinum/iridium. Besides manufacturing glass from standard materials such as Babal, TA-23, and Cabal 12, we also make our own lithium corrosion resistant glass materials. HST performs 100% leak tests on titanium seals in all types of medical equipment. Our glass-to-metal seals consistently have a minimum helium leak rate of 1 x 10-8 cc/sec.


Types of Lithium Battery SystemsLithium / Manganese Dioxide (LiMnO2) Lithium / Silver chromate (Li-Ag2CrO4) Lithium / Silver oxide+vanadium pentoxide (Li-Ag2V4O11 ) Lithium / Sulfur Dioxide (Li/SO2) Lithium / Sulfuryl Chloride (Li-SO2Cl2) Lithium / Thionyl Chloride (Li/SOCl2)
ApplicationsOil Exploration and Down Hole monitoring Lithium Systems in Communication Systems, Torpedoes, and Missiles Medical Lithium Battery Applications for Implantable Defibrillators, Pacemakers, Neurostimulators, and Drug Infusion Systems Lithium Batteries in Consumption Meters, Memory Back-up, Portable Diagnostic Equipment, and Emergency Locator Transmitters
Body MaterialsMild Steel Stainless Steel Titanium
Pin Materials52 Alloy Copper Core 446 or 52 alloy Molybdenum Platinum-Iridium Stainless Steel Other Materials Available Upon Request
Glass MaterialsBabal Cabal 12 and other low silica glass Corning 9010 Corning 9013 HST Custom Lithium Corrosion Resistant Glass TA-23 Other Borosilicate, Barium Alkali, and Soda-Lime glass
CapabilitiesBrazing Glass Formulation Glass Sealing Resistance Welding
TestingHermeticity Testing (100 % leak tests are performed on all seals) Hypot (High Voltage) Testing / Breakdown Voltage Insulation Resistance Testing (Isolation)
Outsourced ServicesElectrochemical Corrosion Testing Glass Smelting Humidity Testing Laser Welding Machining Plating Salt Spray Testing Stamping
Hermeticity1 x 10^8 cc/sec helium leak rate
Production CapabilityWe have the ability to handle orders from ten parts to millions of parts We can also do sample parts HST can help you with free hermetic seal design and development to insurance you have a reliable and robust glass to metal seal
Glass-to-Metal Seal AdvantagesHST hermetic seals are hermetic (leak - tight) to isolate lithium batteries from external moisture and foreign contaminants to ensure long battery life HST glass seals can resist extreme temperature and pressure variations while maintaining hermeticity Our specially formulated glass materials have high corrosion resistance to lithium electrolytes eliminating glass corrosion which reduces shelf life Our "Clean-Seal" technology ensures the high quality of glass-to-metal parts that are free from oxidation and chemical residue that can effect welding and material corrosion resistance
Industries ServedAerospace Automotive Electronic Healthcare Medical Military Oil Exploration
Companies Using HST SealsHalliburton
Quality ControlISO Compliant