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Introducing the HELICOFLEX® Seal

The HELICOFLEX® seal is a resilient high performance metal seal that was created as part of a joint technical collaboration with the French Atomic Energy Commission (CEA). Its incredible performance is a result of many years of research, experimentation and practical application in key markets such as Nuclear, Physics Research, Chemical, Aerospace, Oil & Gas and Industrial. HELICOFLEX® design flexibility allows Technetics engineers to customize the seal characteristics to match each unique application.

HELICOFLEX® Sealing Concept

The sealing concept of the HELICOFLEX® seal is based on viscoplastic deformation of a metallic lining. This lining is selected based on its plasticity, which has to be softer than the flange material. Such deformation is obtained by compressing a helical spring. The spring gives the HELICOFLEX® seal its remarkable elasticity. The use of a helical spring as the elastic core ensures an outstanding level of adaptability to flange geometry and defects.

The Choice of the Spring Characteristics Allows:

  • To adjust compression load based on type of lining material and required sealing level.
  • To control the load needed to ensure a permanent contact between the flanges.

General Characteristics:

  • DN 4 to 8000 mm
  • Ø 1,5 to 40 mm cross section
  • Sealing level from bubble tightness down to 10-12 Pa.m3.s-1
  • Temperature from -272° up to 800°C
  • Pressure from 10-10 mbar up to 3000 bar
  • Very good resistance to radiation
  • Very good resistance to corrosion
  • Extended lifetime
  • Adaptable to all types of sealing surfaces (FF, RF,TG, Groove,….) (3 faces, radial, shaped,…)
  • Adaptable to all flange standards (PNEUROP,ANSI, ISO,…)

Adaptability by the Material Choice

Sealing lining: Aluminum - Gold - Silver - Iron - Copper - Brass - Soft Steel - Nickel - Monel - Tantalum Stainless Steel (304L - 316L - 321 - 316 Ti) - Zirconium - Inconel (600 - 625) - Hastelloy - Titanium - Tin Special materials on demand
Coatings: Gold - Silver - Tin - Nickel - FEP
Spring: Nimonic 90 - Alloy 718 - Alloy 750 - SS - XC80