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    Why Mechanical Seals Fail

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    Laxman Singh Sankhla
    Mechanical seals can fail for four main reasons: restricted movement of the spring loaded faces, deterioration of O-rings due to heat, materials being attacked by the fluid being sealed, and incorrect installation. Restricted movement is often caused by solids collecting in the seal area, swelling of O-rings from fluids, O-rings exceeding their temperature limits, inadequate spring compression, or other foreign material. Many mechanical seal failures also occur due to incorrect installation, which can be minimized by using cartridge seals that are preset and easy to install correctly by following instructions closely.

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    Why Mechanical Seals Fail

    Uploaded by

    Laxman Singh Sankhla
    62 views1 page
    Mechanical seals can fail for four main reasons: restricted movement of the spring loaded faces, deterioration of O-rings due to heat, materials being attacked by the fluid being sealed, and incorrect installation. Restricted movement is often caused by solids collecting in the seal area, swelling of O-rings from fluids, O-rings exceeding their temperature limits, inadequate spring compression, or other foreign material. Many mechanical seal failures also occur due to incorrect installation, which can be minimized by using cartridge seals that are preset and easy to install correctly by following instructions closely.

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    MECH SEAL

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    Mechanical seals can fail for four main reasons: restricted movement of the spring loaded faces, deterioration of O-rings due to heat, materials being attacked by the fluid being sealed, and incorrect installation. Restricted movement is often caused by solids collecting in the seal area, swelling of O-rings from fluids, O-rings exceeding their temperature limits, inadequate spring compression, or other foreign material. Many mechanical seal failures also occur due to incorrect installation, which can be minimized by using cartridge seals that are preset and easy to install correctly by following instructions closely.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    62 views1 page

    Why Mechanical Seals Fail

    Uploaded by

    Laxman Singh Sankhla
    Mechanical seals can fail for four main reasons: restricted movement of the spring loaded faces, deterioration of O-rings due to heat, materials being attacked by the fluid being sealed, and incorrect installation. Restricted movement is often caused by solids collecting in the seal area, swelling of O-rings from fluids, O-rings exceeding their temperature limits, inadequate spring compression, or other foreign material. Many mechanical seal failures also occur due to incorrect installation, which can be minimized by using cartridge seals that are preset and easy to install correctly by following instructions closely.

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    © All Rights Reserved
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    of 1

    Why Mechanical Seals Fail?

    By
    Er. Laxman Singh Sankhla
    B.E.Mech., Chartered Engineer
    Jodhpur, India
    Mail ID: laxman9992001@yahoo.co.in
    Why Mechanical Seals Fail?
    Mechanical Seals failures seem to fall into four broad categories:
    The seal motion was restricted and the faces opened.
    Heat caused the 0-rings to deteriorate.
    The seal materials were attacked by the fluid sealed.
    The seal was installed incorrectly.
    Here are the major conditions that can restrict.. movement of the spring loaded
    mechanical seals face:
    1. Solids have collected in the seal or around the dynamic seal ring.
    2. The fluid sealed has caused the dynamic 0-ring to swell.
    3. The temperature limit of the dynamic 0-ring has been exceeded and the 0ring has lost its elasticity (compression set) or become hard.
    4. Spring compression is inadequate because of incorrect installation.
    5. Solids in the stuffing box, gasket protrusion or other foreign material
    restrict the motion of the dynamic seal ring.
    Mechanical seals installed incorrectly:
    Many mechanical seals fail at initial start-up or prematurely because they were
    not installed correctly. Cartridge seals eliminate all measurement, protect the
    seal faces from contamination and are easy to install. With these seals,
    installation problems are minimized. The Outside seal is preset and requires no
    installation measurement. Only in-line seals require careful measurement to
    insure correct installation. By following the mechanical seals installation
    instructions ,step-by-step correct seal installation is easily achieved.

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