O.T.Hydraulic Seal Questions
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  1. #1
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    Default O.T.Hydraulic Seal Questions

    Sirs,

    I am wanting to know if polypack is just a trade name for a loaded lip seal or are they different products altogether.

    Please elucidate.

    Thanks,
    Bob

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    "Polypac" was the original by Parker Seal division. Over the years, it has been copied and different variations of it are now offered out there under different trade names.

    Edit: Polypac is energized by a O-Ring in the middle of the two lips of the seal. They are the original to the lip seal design. Now days, you find them with a metallic spring installed in place of the O-Ring for more advance sealing systems.

    I've used many of the various variations out there today for some of the equipment I've designed over the years.

    Ken

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    Trade name for a Parker loaded u-cup: https://www.parker.com/literature/En...20Profiles.pdf

    We used them for rod seals in cylinder glands.

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    Thanks guys. That is good to know.

    I have found on some parts list calling for a polypac seal when apparently just a loaded u lip seal would serve.

    Polypac seals seem to be very overpriced.

    Thanks again,

    Bob....not the cat.

  5. #5
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    Just about everyone in the seal business has a loaded u-cup. Check around and you will find them.


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