The Awe and Engineering of Space Exploration


The Awe and Engineering of Space Exploration

BELFAB® Metal Bellow

BELFAB® Edge Welded Metal Bellows


BELFAB® Edge Welded Metal Bellows

BELFAB® Metal Bellow

BELFAB® Edge Welded Metal Bellows


BELFAB® Edge Welded Metal Bellows


Technetics Semi brings over 60 years of experience to designing, testing and manufacturing edge-welded metal bellows for critical applications.


See BELFAB®  Edge Welded Metal Bellows in Action on NASA’s Mars Perseverance Rover



Features & Benefits


  • Wide range of materials and configurations to choose from
  • High spring rate, very low tolerance for axial displacement
  • Low magnetic permeability
  • Corrosion-resistant
  • 0.0015” to 0.02” diaphragm thickness
  • 1/4” to 18” outer diameter
  • Vacuum pressure to > 1,000 psi
  • Cryogenic temperatures to 1800°F



As a forerunner in the development of this technology, we continually work to advance the state of the art by engineering unique design solutions that solve critical needs within complex mechanical systems. We also offer contract assembly services including design, fabrication, welding, upper-level assembly, testing and packaging. A certified Class 100/1000 cleanroom assembly environment is available as required. As an ISO 9001-certified organization noted for world-class cellular manufacturing, Technetics Semi has built its reputation on a foundation of total quality achievement.


Product Applications


  • Semiconductor: actuators, beamlines, connectors, feed-throughs, leak detectors, sensors, wafer handlers
  • Aerospace: reservoirs, toggle switches, cold plate assemblies, fuel drains, engine kiss seals
  • Oil & Gas: actuators, connectors, couplings, feed-throughs, gas lines, reservoirs, sensors
  • Medical: batteries, cardiovascular devices, implants, drug delivery, monitoring devices, vacuum pumps, valves


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About Qualiseal® Technology


About Qualiseal® Technology

Nuclear Brochure

Technetics has unsurpassed experience creating solutions for new nuclear power plants, existing nuclear power plants, spent fuel casks, fission reactors, enrichment plants and national laboratories.

Accumulator

Accumulators & Reservoirs


Accumulators & Reservoirs

Qualiseal® Metal Bellow Mechanical Face Seals

Qualiseal® Metal Bellows


Qualiseal® Metal Bellows


Sometimes, operating conditions are so harsh, ordinary secondary seals won’t do the job. That’s when it’s time to call in the big guns—Qualiseal® metal bellows seals. Qualiseal® offers metal bellows as a secondary sealing option for mechanical face seals. Providing exceptional sealing performance in highly toxic, corrosive, high temperature and/or high pressure environments, a metal bellows design can be the optimal solution to solve the most difficult sealing challenges. The bellows function as the secondary seal, as the spring to hold the primary seal against the mating ring, and as the anti-rotational lock. Only the most complex and demanding applications require the high performance and reliability of a bellows seal.


Features & Benefits


Benefits:
  • Enables high chemical resistance
  • No dynamic O-ring required, eliminating the possibility of hang-ups or compatibility issues
  • Hydraulically balanced metal bellows allow the seal to handle more pressure without heat buildup
  • Can fit into same space as existing face seals
  • Moderate operating lengths with compact construction
Features:
  • Can utilize either an O-ring on the outer diameter in a slip fit application, or can be designed to press-fit into the seal bore of your unit
  • Unbalanced or balanced designs
  • Seal designs incorporate seal face material grades to encompass a wide range of applications, including high-pressure velocity (PV) or extreme vibration applications




Product Applications


Ideal For:
  • Extremely high-temperature fuel, oils and gases
  • Extremely low temperatures such as liquid oxygen refrigeration systems
  • Examples include aircraft engines and rocket propulsion systems


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UHP and UHV Brochure


UHP and UHV Brochure

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