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  1. Home
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  3. Technetics Group Japan
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Machine elements and parts
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Technetics Group Japan

capital8406Ten thousand
number of employees5
addressTokyo/Chuo-ku/Kyobashi 3-10-1, NEWS Kyobashi 8th Floor
phone03-6271-0546
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last updated:Sep 03, 2025
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Technetics Group Japan List of Products and Services

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Helicoflex HELICOFLEX(R) Helicoflex HELICOFLEX(R)
Delta Seal HNV HELICOFLEX(R) DELTA Delta Seal HNV HELICOFLEX(R) DELTA
Other metal seals Other metal seals
Elastomer seal Elastomer seal
Metal and carbon fiber brush seals. Metal and carbon fiber brush seals.
BELLFAB(R) welded bellows BELLFAB(R) welded bellows
Nuclear industry Nuclear industry
semiconductor industry semiconductor industry
Nuclear

Nuclear industry

Our company is focusing on the development of sealing components for the nuclear industry. At our R&D innovation lab, maestral, located in southern France, we are actively developing new solutions for fourth-generation nuclear power and fusion projects, as well as hydrogen fuel cell and electrolysis projects.

Technetics Group for the entire nuclear power lifecycle.

High-performance seals, components, and subsystems for nuclear applications with proven performance to reduce accident risks and enhance safety.

Our products are used in new and existing nuclear power plants, spent fuel casks, fission reactors, enrichment plants, and national laboratories. We are focusing on the development of sealing components for the nuclear industry. At our R&D innovation lab, maestral, located in southern France, we are actively developing new solutions for fourth-generation nuclear power and fusion projects, as well as hydrogen fuel cell and electrolysis projects. We assist in solving demanding technical challenges to improve performance and lifespan. 【Applications (partial)】 ■ Fusion ■ Spent fuel casks ■ Small modular reactors (SMR) ■ Fourth-generation reactors ■ Molten salt reactors (MSR) *You can download the English version of our technical materials and case studies. *For more details, please feel free to contact us.

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Spring-energized metal C-ring HELICOFLEX(R) seal

It is a metal seal with elasticity! Compatible with RF/FF, T&G, NW/KF, three-face contact type, ICF/conflat, irregular shapes, and rectangular shaped grooves!

The "Spring-energized metal C-Ring HELICOFLEX(R) Seal" demonstrates sealing performance through the plastic deformation of the outer casing and the elasticity of the spring. It is compatible with pressures ranging from 10^-10 mbar to 3000 bar and temperatures from -272℃ to 800℃. It has excellent adaptability to flange shapes and distortions. Materials: Aluminum, silver, copper, nickel, stainless steel, and others. 【Features】 ■ Seal diameter Φ4 to 8000 ■ Cross-section diameter 1.5 to 40 ■ Compatible with pressures from 10^-10 mbar to 3000 bar ■ Compatible with temperatures from -272℃ to 800℃ ■ Highly resistant to radioactivity *For more details, please refer to the PDF document or feel free to contact us.

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Spring-loaded C-ring metal seal "HelicoFlex Beta HNR"

Reduce the Y of the HelicoFlex! It maintains functionality even under positive pressure and high temperatures!

The spring of the "HelicoFlex Beta HNR" has been specially processed around its entire circumference to distribute elasticity more appropriately to the metal casing. When compared to the standard HelicoFlex seal, the design tightening pressure (Y2 value) is theoretically reduced by about 30%. As a result, there are more cases where metal touch can be achieved without scratching the flange groove. For more details, please contact us. 【Features】 ■ Special processing applied around the entire circumference ■ Even lower design tightening pressure than before ■ Maintains functionality even under positive pressure and high temperatures *For more information, please refer to the PDF document or feel free to contact us.

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Low load design, Texturized metal seal Helicoflex "Texseal"

TEXEAL: by applying patented texture processing to the conventional HELICOFLEX, the sealing performance is improved! The tightening pressure is also reduced!

By applying a patented texture processing to the conventional spring-loaded C-ring HELICOFLEX, we enhance sealing performance. 【Features】 - Reduces overall equipment costs by incorporating it at the design stage - Compatible with the transition from silver to nickel in nuclear applications - MTBF (Mean Time Between Failures) - Reduction in LCC (Life Cycle Cost) - Optimizes sealing performance without increasing tightening torque *For more details, please refer to the related link page or feel free to contact us.

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Compression and restoration characteristics: Spring-loaded C-ring Heliflex series

Introducing the compression and recovery characteristics of the HELICOFLEX® series!

We would like to introduce the compression and recovery characteristics of our HELICOFLEX® series. The compression recovery of the HELICOFLEX series features a gently flattening compression curve. The recovery curve takes a different shape than the compression curve. This is the result of two permanent deformations (the elastic deformation of the spring and the plastic deformation of the outer casing). Each value is determined by the allowable leakage amount and the selection of materials. We have included a diagram with detailed information in the catalog, so please feel free to download and take a look. *For more details, please refer to the PDF materials or feel free to contact us.

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Spring-energized metal seal "HELICOFLEX Seal"

Excellent leakage tolerance and corrosion resistance! We provide products customized to the sealing characteristics that meet our customers' applications.

The "HELICOFLEX Seal" is a sSpring-energized metal seal developed in collaboration with the French Atomic Energy Commission (CEA). The remarkable performance of this product is the result of years of research and development, experiments, and practical applications in markets such as nuclear energy, aerospace, high vacuum, oil refining/chemicals, gas, and other general industries. With flexible design capabilities, we provide customized products tailored to the sealing characteristics that meet your specific applications. 【Features】 ■ Seal diameter φ4 to 8000mm ■ Pressure range from 10^-10 mbar to 3000 bar ■ Temperature range from -272℃ to 800℃ ■ Acceptable leakage rates that accommodate from foam liquid levels to ultra-high vacuum levels ■ Compatible with all flange standards and flange surfaces (PNEUROP, ASME, ISO, JIS, etc.) *For more details, please refer to the PDF document or feel free to contact us.

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Inflatable seal (inflatable seal, new seal) CEFIL'AIR

It can be used in situations where sealing, handling, or locking is required. The vacuum ranges from 0.133 Pa to high pressure, and the design temperature is from -60°C to +220°C.

"CEFIL'AIR" is an expandable seal (inflatable seal, pneumatic seal) suitable for areas that frequently require sealing. It is possible to manufacture products certified by FDA and USP Pharma Class VI. It expands and contracts with air pressure and can be used for multiple purposes thanks to our technology and proprietary elastomers. We offer multiple options for both materials and profiles (cross-sectional shapes), with design conditions ranging from a vacuum of 0.133 Pa to high pressure, and design temperatures from -60°C to +220°C. It can withstand even more stringent conditions for short periods. [Features] ■ Products certified by FDA and USP Pharma Class VI can be manufactured ■ Expands and contracts with air pressure ■ Safe structure suitable for areas that frequently require sealing ■ Rich variety of cross-sectional shapes and materials with our proprietary elastomers (silicone, SBR, EPDM, FKM, etc.) ■ Capable of manufacturing both small and large sizes in various cross-sectional shapes *For more details, please refer to the PDF document or feel free to contact us.

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Ideal for factory automation and handling! Inflatable Seal CEFIL'AIR

Ideal for factory automation and handling! Vacuum from 0.133 Pa to high pressure, with a design temperature range of -60 to 220℃.

The "Inflatable Seal - New Machine Seal" is an expandable seal that expands and contracts with air pressure and other factors. It has a suitable structure for areas where sealing is frequently required, ensuring safety. We offer a wide variety of cross-sectional shapes and materials made from our own elastomers. Due to its high design flexibility, it can be manufactured in both small and large sizes with various cross-sectional shapes. 【Features】 ■ Expands and contracts with air pressure and other factors ■ Suitable structure for areas where sealing is frequently required, ensuring safety ■ A wide variety of cross-sectional shapes and materials available (silicone, SBR, EPDM, FKM, etc.) made from our own elastomers ■ Can be manufactured in both small and large sizes with various cross-sectional shapes ■ Suitable for factory automation and handling ■ Ideal for areas requiring airtightness *For more details, please refer to the PDF document or feel free to contact us.

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Helicoflex Texseal for the Nuclear Industry

Reduce radiation exposure during maintenance and lower operational costs!

The "Helicoflex Texseal" is a technology that applies texture processing to the HELICOFLEX metal seal. This technology can be added to Helicoflex spring-loaded C-rings, with the basic outer material being nickel. It is compatible with the seal outer diameters within the Helicoflex manufacturing range. The HELICOFLEX, a synonym for high-performance sealing products, ensures the safety of your equipment and devices while enhancing overall performance. 【Features】 ■ Removal of silver from the primary loop ■ Optimization of clamping force ■ Improvement of sealing performance ■ Reduction of processing and maintenance costs ■ Time savings during assembly and reduction of radiation exposure *For more details, please download the PDF or feel free to contact us.

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