Helicoflex texturised seal comparison

Helicoflex Texeal Brochure

Helicoflex Texeal Brochure

Hydrogen-The Hydrogen Future is Now

The Hydrogen Future is Now

Webinar Highlights

Hydrogen has the potential to become a leader in green, renewable energy sources. Join us as Technetics Group sealing experts and industry thought leaders discuss all things hydrogen. Get an inside look at hydrogen industry trends, research and development, and applications.

Key Takeaways:

  • Learn about hydrogen as an energy source
  • Review the latest information on hydrogen industry trends
  • Discover new trends in hydrogen research and development
  • Explore the most popular hydrogen applications

This webinar will also cover PEM electrolyzers, porous transport layer (PTL), hydrogen gas handling, storage and transportation, and the future of hydrogen.

FELTMETAL™ Porous Transport Layer (PTL)

FELTMETAL™ Porous Transport Layer (PTL)

Taking What We Know and Making Something New

Technetics is taking over 50 years of experience manufacturing FELTMETAL™ products for the Aerospace industry and “transporting” it to Green Hydrogen. Through partnerships with universities and industry partners, we are developing various Porous Transport Layer materials to meet the needs of various applications.


  • Voltage required to produce 1A/cm2 (refer to table below).
  • Low contact and ohmic resistance.
  • Low variation in steady-state (operational stability) response over time.
  • Can tailor porosity and thickness to your application needs (find the right balance between “bubble” removal and contact resistance, length of diffusion and mechanical strength).
  • Smooth surface allows for better contact with catalyst layer.
  • Longer life in highly corrosive environment compared to carbon paper.

Material Properties

  • Material: 347 Stainless Steel, Hastelloy-X, FeCrAlY (please contact us for other material options)
  • Density: Any density between 18% and 75%
  • Minimum Thickness: 0.007 [180 microns]
  • Gradient (2-layer) density materials in development

What Is A Porous Transport Layer?

A Porous Transport Layer is the layer in an Electrolyzer stack that allows for the removal of oxygen gas from water during the Electrolysis process. It must also provide good electrical conductivity and operational stability over time.


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


FELTMETAL™ Porous Transport Layer (PTL)

PTL Type

(mm [in])



Pore Size

@ 1A/cm2 (V)

Current Density

@ 1.8V (A/cm2)

Current Density

@ 2.0V (A/cm2)

Contact Resistance

@ 50N/cm2 (Ohms*cm2)

Electrical Resistivity


Hastelloy-X~0.28 [0.011]35 – 4010 – 301.641.963.530.190.92
Hastelloy-X~0.50 [0.020]55 – 60>101.741.212.19
347 Stainless~.27 [0.011]35 – 40>41.801.001.78
Hastelloy-X~0.18 [0.007]Gradient5 – 151.651.983.480.190.68
Hastelloy-X~0.95 [0.037]75 – 80>151.751.222.480.352.66
347 Stainless~.82 [0.034]75 – 80>151.850.821.611.202.82

* Thickness and porosity tested, not manufacturing capability limits

DEMO Fusion Reactor Case Study

Our client approached Technetics to develop a seal and optimized assembly concept for a maintenance plan to manage the Tokamak port cells for their DEMO fusion reactor. This is no small feat.

DEMO Fusion Reactor Case Study

DEMO Fusion Reactor Case Study

Technetics’ Seals and Maintenance Expertise Propels DEMOnstration Fusion Power Plant Forward

The next-generation DEMOnstration power plant, or DEMO, is “an industry- and technology-driven program, a key criterion for DEMO is the production of electricity,” according to its designers. 

 Our client approached Technetics to develop a seal and optimized assembly concept for a maintenance plan to manage the Tokamak port cells for their DEMO fusion reactor. This is no small feat as the seal’s performance is required to:  

  • contain the plasma at high temperatures,  
  • maintain a significant enough density of reacting ions,  
  • capture high-energy neutrons from the reaction without melting the reactor walls, 
  • ensure efficient operation of the plant through the prevention of pressurized steam loss, and 
  • protect the plant against corrosion caused by extreme temperatures inside the reactor core. 

Failure is not an option as it would result in the escape of radioactive materials — causing negative consequences to human health and the environment — and an unstable reactor core, which would cause substantial damage to the Tokamak’s walls.  

Clearly, the client needs industry-leading experts, and Technetics is up for the challenge. 

Excelling the Future of Energy Through Technetics’ Advanced Sealing Technology 

Port cells serve as confinement barriers to shield the environment from radiation generated by the reactor. The cells, made of specially formulated concrete, oppose the passage of neutrons and contamination. As important as it is to keep the radiation confined, it’s equally essential that the port cells are accessible to allow maintenance and repairs of the interior reactor.   

Thanks to collaboration with the CEA, Technetics is working to solve these demanding technical challenges to enhance the project’s performance and longevity in many ways. For instance, Technetics provides various engineering solutions to develop and maintain vacuum chamber sealing as well as designing and developing specific components for the reactor, such as vacuum seals.  

We steadily provide ultra-high vacuum, irradiation, tritium environment, and remote handling solutions throughout the program. Our engineers develop safety systems, cycle systems, and maintenance services to ensure the solutions are performing correctly. Additionally, we are committed to a complete, all-around engineering study and analysis for the four years of the program. 


Technetics Provides Clients with Reliable Sealing Solution

Technetics delivers our premier sealing service to the technological innovations involved in our client’s new DEMO Power Plant. This project requires the best hands to gather top-quality technologies to develop a ground-breaking fusion reactor, and we deliver our seals and maintenance for the Tokamak port cells.  

Now, our client has a safe and efficient DEMO fusion reactor, allowing them to focus on the primary goal of the technology: producing electricity.  

 At Technetics, we welcome challenging projects and enjoy finding solutions to meet our customers’ needs. Ready to start your partnership? Contact us today.

Critical Sealing For Hydrogen Production and Storage On-Demand Webinar

Critical Sealing For Hydrogen Production and Storage On-Demand Webinar

In this webinar, we discuss the challenges and the hydrogen-related R&D applications where Technetics has already been involved since 2006, including solid oxide fuel cells, high-temperature electrolysis, proton exchange membrane fuel cells and more. Prepare to learn about the challenges and solutions for this exciting green energy source, hydrogen.

Webinar Highlights

Key Takeaways:

  • Learn about hydrogen as an energy source
  • Explore hydrogen-related R&D applications that Technetics is involved in
  • Discover how Technetics Group handles hydrogen-related challenge

Push to Green Hydrogen Generation

Hydrogen: Push Towards the Generation of Green H2

The desire to move to sustainable energy sources and reduce carbon emissions is growing exponentially. Low-cost renewable energy sources (e.g., solar, wind, hydro) are being developed and deployed worldwide.

Hydrogen Research Podcast promo

Getting Technetical: Hydrogen-Push Toward the Generation of Green H2

There have been advancements in the research and development of clean energy sources. Hydrogen has been identified as a potential green energy source.

Green Hydrogen lifecycle

Hydrogen Production: The Challenges and Practical Applications

As the world shifts its focus to decarbonization initiatives, research shows responsible leaders will pour more technology and infrastructure into the hydrogen production economy to provide clean, carbon-free energy storage.


Non-Contacting Lift-Off Seal

Non-Contacting Lift-Off Seal