An Aerospace Spin on Non-contacting Seal Technology

Non-Contacting Sealing Technology Reduces Wear, Heat, Increases Life Expectancy
Design features in the face of the mating ring force fluid (air, gas) into a converging gap in the sealing face. As the pressure builds, the faces separate.

How Metal Seals Work Infographic

How a Metal Seal Works


How a Metal Seal Works

Racing industry image

Racing Flyer


Racing Flyer

HELICOFLEX® Spring Energized Seal

HELICOFLEX® Resilient Metal Seal


HELICOFLEX® Resilient Metal Seal


The HELICOFLEX® seal is a high performance, flexible metal seal that has exceptional compression and elastic recovery properties. This seal is composed of a close wound helical spring surrounded by one or more metal jackets. The spring is designed to have a specific compression resistance. During compression, the resulting specific pressure forces the jacket to yield and fill the flange imperfections while ensuring positive contact with the flange sealing faces. Each coil of the helical spring acts independently and allows the seal to conform to surface irregularities on the flange surface.

HELICOFLEX® design flexibility allows Technetics engineers to customize the seal characteristics to match each unique application.




Features & Benefits


  • Highest sealing level performance on the market, depending on the sealing load, the surface finish, and the surface treatment
  • Excellent corrosion resistance
  • Wide range of materials: from standard to specific and/or rare
  • Special materials on demand for coatings: wide range of materials available, from standard to specific and/or rare (see details below in “Specifications” section)
  • Extended lifetime and more
  • Excellent radiation resistance
  • Compatible with NACE MR 0175
  • Ø 4 to 8000 mm
  • Ø 1,5 to 40 mm cross-section
  • Adaptable to all types of sealing surfaces (triple faces, radial, shaped, and more)
  • Adaptable to all standards flanges (PNEUROP, ANSI, ISO, and more)




Product Applications


  • Nuclear: reactor pressure vessels, control rods, primary pumps, pressurizers, spent fuel casks, transportation casks
  • Valves: body/bonnet sealing, seat sealing
  • Oil and gas: hydraulics, subsea couplings, subsea Christmas trees, subsea compressors, electronic submersible pumps, flow meters
  • Life sciences: imaging & scanning systems
  • Ultra-high vacuum: accelerators & fusion research
  • Semiconductor chamber, exhaust and other applications in PVD/CVD/etch and lithography processes
  • Gas/chemical delivery systems
  • Automotive: engine, exhaust gas


SPEAK WITH A SPECIALIST

Have questions? A Technetics Group product specialist will get back to you to shortly.


Specifications




Resources

Helicoflex texturised seal comparison

HELICOFLEX® TEXEAL® Texturised Seal


HELICOFLEX® TEXEAL® Texturised Seal


Increase the overall sealing performance for your installations with TEXEAL®, the new patented texturing process, applied to HELICOFLEX®, already the resilient metal seal standard for high-performance sealing.

HELICOFLEX® TEXEAL® can help reduce operating costs during maintenance. It is a material innovation developed from decades of established sealing expertise.


Features & Benefits


  • Decreased overall cost of assembly during design phase 
  • Reduced overall operating cost 
  • MTBF (mean time before failure) increase  
  • LCC (life cycle cost) ​decrease  
  • Sealing performance optimized without increasing tightening force​ (up to 10-12 Pa.m3.s-1) 
  • Lower stress on the assembly using the same tightness level 
  • Sealing performance maintained during thermal cycles 
  • Adaptable to a wide range of assembly dimensions 
  • Adaptable to groove sealing surfaces 
  • Choice of Materials 




Product Applications


  • Nuclear: reactor pressure vessels closure head, control rods, reactor coolant pumps (RCP), pressurizers, steam generator, spent fuel casks
  • New energies: molten salts & solar plants
  • Semiconductor: chamber, exhaust and other applications in PVD/CVD/etch and lithography processes
  • Valves: body/bonnet sealing, seat sealing
  • Steam generator seal

Texeal Webinar Promo


SPEAK WITH A SPECIALIST

Have questions? A Technetics Group product specialist will get back to you to shortly.


Specifications




Resources

ORIGRAF® Graphite Seals

ORIGRAF® Graphite Seals


ORIGRAF® Graphite Seals


The ORIGRAF® seal provides a lasting high-performance sealing solution for all industries. It can be specifically designed for extreme thermal & pressure cycles ensuring higher safety in operation while optimizing total cost of ownership.

Unlike flexible graphite cut gaskets, the compression of the ORIGRAF® die-formed seal is limited by a mechanical stop: groove or inner and/or outer ring. In the case of assemblies subject to extreme pressure and/or temperature this design prevents excessive seating stress on the seal during transients.

This reliable and sustainable solution allows the optimization of overall operating costs, increasing the Mean Time Between Failure (MTBF).


Features & Benefits


  • Excellent elastic recovery, capable of reaching 40% of compression recovery (spring back effect)
  • Graphite spring-back effect serves the sealing function
  • Adaptability to extreme thermal and pressure changes
  • Chemical inertness: withstands most chemicals (mineral acids and solvents)
  • Natural lubrication of the graphite: excellent resistance to radial movements of the flanges
  • Can be adapted to damaged flanges
  • Flexible graphite does not stick to the contact surfaces: can be easily removed
  • Low creep and relaxation
  • Withstand differential radial motion



Product Applications


ORIGRAF® seals are mainly used in applications servicing the following industries:

  • Nuclear
  • Chemical
  • Petrochemical
  • Aerospace
  • Life Sciences
  • Oil & Gas

The range of applications can be extensive, including:

  • Steam equipment
  • Heat exchangers/heaters
  • Piping connection flanges
  • Corrosive circuit
  • Critical flange applications
  • Boilers manways
  • Fire safe requirements
  • Alkylation units


SPEAK WITH A SPECIALIST

Have questions? A Technetics Group product specialist will get back to you to shortly.


Specifications




Resources

HELICOFLEX® Spring Energized Seal

HELICOFLEX® Spring-Energized Metal Seals


HELICOFLEX® Spring-Energized Metal Seals

C-Flex, turbopump seal

C-FLEX™ Metal Seal


C-FLEX™ Metal Seal


The sealing design of C-FLEX™ metal C-rings is based on the elastic deformation of a metal “C” substrate which, during the compression cycle, gives a contact point on each sealing surface. The substrate characteristics determine the compressive load of the seal. This load combined with an accurate compression rate results in a specific pressure which is directly related to the sealing level obtained. A certain specific pressure is necessary to make the seal flow into the flange imperfections. In service, the system pressure supplements this load. A softer surface treatment is available to increase the plasticity of the seal and reduce the specific pressure necessary to reach the desired sealing level.

View the features and benefits of C-FLEX™ below


Features & Benefits


Properties:
  • Pressure energized
  • Cross-section and wall thickness designed to control loading
  • Available for internal, external and axial pressure
  • Range of materials (Alloy X750, 718, Waspaloy and other exotic metals)
  • Platings and coatings: silver, gold, PTFE (others available)
  • Temperature range: from -273°C to 730°C (-460°F to 1350°F)
  • Pressure range: from medium vacuum to 2,000 bar (29,008 PSI)
  • Leak range: Approximately ≤ 25 cc/min @ 50 psig Nitrogen per inch of diameter to ≤ 1 x 10-4 std.cc/sec Air. The actual leak rate will depend on seal load, surface finish, and surface treatment.
Optional Features:
  • Tribological wear-resistant coatings available
  • Custom shapes and sizes available



Product Applications


  • Oil & gas: downhole drilling/MWD
  • Industrial turbines: fuel systems/nozzles
  • Valves: body/bonnet, back seat sealing
  • Aerospace/space: turbopump, fuel systems, nozzles/injectors, cryogenics
  • Automotive: turbochargers, exhaust


SPEAK WITH A SPECIALIST

Have questions? A Technetics Group product specialist will get back to you to shortly.


Resources

LAMELFLEX® Laminated Seal

LAMELFLEX®Laminated Seal


LAMELFLEX®Laminated Seal


LAMELFLEX®, a unique laminated seal, is designed for critical service applications and dedicated to achieving the highest efficiency for your triple offset butterfly valves by significantly reducing internal leak paths. With state-of-the-art engineering, our LAMELFLEX® seals form a strong seal against rigid valve seats and deliver optimal cycle frequency and fire safety. Through thoughtful design and precise manufacturing, this product can achieve bidirectional ANSI Class VI shut-off, the most stringent leakage performance standard as tested with liquid nitrogen.


Features & Benefits


The benefits obtained by using LAMELFLEX® seals result from:

  • Complete analysis of the valve – hardware interface with the seal
  • Understanding the interaction between the different materials and their behaviors
  • Taking into account seal assembly in the valve manufacturing process
  • Understanding the effects related to the direction of fluid flow including bidirectional operation
  • Rigorous selection of the appropriate machining method to ensure dimensional tolerances and good surface finish at the valve seat.
  • Special designs available with diverse materials according to specifications
  • Lamination of special material (graphite, PTFE) and metal, offering a combination of compressible and resilient materials
  • Available in sizes from 75 mm to 900 mm (3 inch to 36 inches)



Product Applications


  • Valves: seat sealing, butterfly triplet offset
  • Oil & gas
  • Cryogenic
  • Nuclear power
  • Industrial


SPEAK WITH A SPECIALIST

Have questions? A Technetics Group product specialist will get back to you to shortly.


Specifications




Resources

Metal Seals Master Catalog


Metal Seals Master Catalog