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Home Xometry Community Materials & Finishes Shore A Elastomers for High Pressure Seals

Shore A Elastomers for High Pressure Seals

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Hello everyone, I am working on a project that requires the selection of the right elastomer for a seal. I am trying to understand how the Shore A hardness scale influences the flexibility and durability of the material. Can someone explain to me how to choose the Shore A hardness for seals intended for high pressure environments? Thanks!

Automatically translated from: Italiano
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Solved by Giuseppe Pestrin

Good morning Alessandro,
-Softer compounds are more suitable for sealing rough surfaces, as their flexibility and malleability means they are able to adapt to irregular areas allowing a hermetic seal
-Harder compounds provide greater resistance to abrasion and extrusion but offer less flexibility making them the best choice for sealing even areas subject to high pressure
Most polymers used for seals fall within the 60-90 range of the Shore A scale, as they offer the necessary resistance to extrusion and pressure
The standard for most seals is Shore 70A Hardness as it's the ideal combination of malleability hardness and durability, able to flex when necessary but also withstand pressure
Seals with 90 Shore A Hardness are harder, able to withstand more pressure. These materials are more durable and can be used in dynamic applications
I hope this explanation is helpful to you
Best regards

    • A
      Hello everyone, I am working on a project that requires the selection of the right elastomer for a seal. I am trying to understand how the Shore A hardness scale influences the flexibility and durability of the material. Can someone explain to me how to choose the Shore A hardness for seals intended for high pressure environments? Thanks!
      Automatically translated from: Italiano

      See original
      0
      Reply
    • G

      Good morning Alessandro,
      -Softer compounds are more suitable for sealing rough surfaces, as their flexibility and malleability means they are able to adapt to irregular areas allowing a hermetic seal
      -Harder compounds provide greater resistance to abrasion and extrusion but offer less flexibility making them the best choice for sealing even areas subject to high pressure
      Most polymers used for seals fall within the 60-90 range of the Shore A scale, as they offer the necessary resistance to extrusion and pressure
      The standard for most seals is Shore 70A Hardness as it’s the ideal combination of malleability hardness and durability, able to flex when necessary but also withstand pressure
      Seals with 90 Shore A Hardness are harder, able to withstand more pressure. These materials are more durable and can be used in dynamic applications
      I hope this explanation is helpful to you
      Best regards

      Automatically translated from: Italiano

      See original
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Shore A Elastomers for High Pressure Seals
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