Product Fact Sheet - “Duo Extrusion”
  • Product Fact Sheet - “Duo Extrusion”

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Manufacturer: TC SHIELDING

EMC extruded gasket "Duo Seal"

Freedom from galvanic corrosion of joints at a sealing interface using conductive elastomeric gaskets is a fundamental consideration in certain environments. In some cases it is possible to select a suitable combination of materials to mitigate the effects, but sometimes it is necessary to include an additional environmental seal.
The duplicity of seals can perform extremely well but has a fundamental problem of packaging. Two gaskets require a large amount of volume, particularly if one uses two ‘O’ ring grooves.
T C Shielding has specifically developed “duo-extrusion” to offer a compact, space efficient gasket. The duo-extrusion comprises two materials with a vulcanised seamed joint. One component is conductive, providing an effective EMC gasket, the other component is an environmental seal in non-conductive silicone or fluorosilicone. The environmental component effectively protects the EMC gasket from external contaminants, including moisture, thus preventing galvanic corrosion

 

Materials used can be silver aluminium, silver copper or nickel graphite silicones for the conductive seal, and silicone or fluorosilicone for the non-conductive sealing element.

Summary of features:

  • Compact use of a single rectangular groove.
  • Low clamping load.
  • Custom design capability to suit hardware.
  • Self retaining capability.
  • Available in a comprehensive range of materials.
  • Environmental sealing up to 5 bar is possible.

The product is produced by continuous process and can be supplied in strip, roll or conductive vulcanised to form a jointed ring.



The Solution

Developed to address the dual requirements of environmental sealing and high levels of AEMC shielding.
Eliminates the potential for galvanic corrosion associated with highly conductive materials when used with dissimilar metallic hardware.

‘DUO SEAL’ FROM T C SHIELDING - THE ULTIMATE PROTECTION

Typical Duo Seal [&] Groove Detail

ITEM A : CONDUCTIVE R/F SEAL
ITEM B : NON-CONDUCTIVE SEAL

NOTES:
MAXIMUM SECTIONAL AREA = 5.13mm PER SECTION
ITEMS A AND B ARE CO-VULCANISED
DUO SEAL PART No. ES-XX-176

 

REKOMENDOWANE WYMIARY ROwka DLA DUO SEAL ES-XX-176

NOTES ON DUO SEAL REF: ES-XX-176

  • max compression: 20%
  • min compression: 7.2%
  • groove tolerance: ±0.10mm
  • duo seal tolerance: ±0.15mm
  • max seal sectional area: 10.26mm2
  • seal max/min height: 3.75mm/3.45mm
  • groove max/min height: 3.2mm/3.0mm
  • min groove sectional area: 10.50mm2

Special Duo Extruded Profiles

Non standard profiles that have been developed to suit specific customer applications for high spec RFI / IP applications.

Uszczelka wytłaczana EMC

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Freedom from galvanic corrosion of joints at a sealing interface using conductive elastomeric gaskets is a fundamental consideration in certain environments. In some cases it is possible to select a suitable combination of materials to mitigate the effects, but sometimes it is necessary to include an additional environmental seal.
The duplicity of seals can perform extremely well but has a fundamental problem of packaging. Two gaskets require a large amount of volume, particularly if one uses two ‘O’ ring grooves.
T C Shielding has specifically developed “duo-extrusion” to offer a compact, space efficient gasket. The duo-extrusion comprises two materials with a vulcanised seamed joint. One component is conductive, providing an effective EMC gasket, the other component is an environmental seal in non-conductive silicone or fluorosilicone. The environmental component effectively protects the EMC gasket from external contaminants, including moisture, thus preventing galvanic corrosion

 

Materials used can be silver aluminium, silver copper or nickel graphite silicones for the conductive seal, and silicone or fluorosilicone for the non-conductive sealing element.

Summary of features:

  • Compact use of a single rectangular groove.
  • Low clamping load.
  • Custom design capability to suit hardware.
  • Self retaining capability.
  • Available in a comprehensive range of materials.
  • Environmental sealing up to 5 bar is possible.

The product is produced by continuous process and can be supplied in strip, roll or conductive vulcanised to form a jointed ring.



The Solution

Developed to address the dual requirements of environmental sealing and high levels of AEMC shielding.
Eliminates the potential for galvanic corrosion associated with highly conductive materials when used with dissimilar metallic hardware.

‘DUO SEAL’ FROM T C SHIELDING - THE ULTIMATE PROTECTION

Typical Duo Seal [&] Groove Detail

ITEM A : CONDUCTIVE R/F SEAL
ITEM B : NON-CONDUCTIVE SEAL

NOTES:
MAXIMUM SECTIONAL AREA = 5.13mm PER SECTION
ITEMS A AND B ARE CO-VULCANISED
DUO SEAL PART No. ES-XX-176

 

REKOMENDOWANE WYMIARY ROwka DLA DUO SEAL ES-XX-176

NOTES ON DUO SEAL REF: ES-XX-176

  • max compression: 20%
  • min compression: 7.2%
  • groove tolerance: ±0.10mm
  • duo seal tolerance: ±0.15mm
  • max seal sectional area: 10.26mm2
  • seal max/min height: 3.75mm/3.45mm
  • groove max/min height: 3.2mm/3.0mm
  • min groove sectional area: 10.50mm2

Special Duo Extruded Profiles

Non standard profiles that have been developed to suit specific customer applications for high spec RFI / IP applications.

Uszczelka wytłaczana EMC

Less
Read more