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Materials Technology

Elastomers - Nuclear

James Walker has developed two ranges of Shieldseal® elastomers for use with ionising radiation. They are backed with evaluation results from specialist test houses and nuclear sector customers.

Shieldseal® 600
Elastomers that resist ionising radiation. Their change in physical properties has been monitored over time with gamma radiation to prove compression-set resistance and long service life.

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Shieldseal 621 - Radiation grade

Nitrile elastomer for use with ionising radiation

  • Acrylonitrile-butadiene formulated for radiation resistance
  • Excellent chemical resistance
  • Resistant to wear and abraison
  • Excellent value for money
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Shieldseal 641 - Radiation grade

Soft grade elastomer for use with ionising radiation

  • Fluoroelastomer with excellent radiation resistance
  • Enhanced high temperature capability
  • Soft grade for sealing duties at low closing forces
  • Excellent value for money
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Shieldseal 661 - Radiation grade

Soft grade elastomer for use with ionising radiation

  • Ethylene-propylene with outstanding radiation resistance
  • Soft grade material for efficient fluid sealing at low closing forces
  • Low levels of the ions that promote metalwork corrosion
  • Economically priced
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Shieldseal 662 - Radiation grade

Medium grade elastomer for use with ionising radiation

  • Ethylene-propylene with outstanding radiation resistance
  • Medium hardness for general applications
  • Low levels of the ions that promote metalwork corrosion
  • Economically priced
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Shieldseal 663 - Radiation grade

PMUC approved material for use in French nuclear plant

  • Peroxide cured ethylene-propylene terpolymer
  • Radiation/ageing tested for 40-year lifespan
  • Strong resistance to short-term high pressure and temperature spikes
  • Nominal 80 IRHD for general sealing applications
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