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Tuf-Lok  Ring Grip Pipe Couplings
Series 688

Dimensions & Specifications
Tuf-Lok Ring Grip Pipe Coupling Series 688/698 Drawing

Gaskets

  • Black EPDM
    Tuf-Lok coupling standard gasket, rated to 230° F (110° C)

  • White Buna-N
    Tuf-Lok coupling standard food grade gasket, rated to 180° F (82° C)

  • White Silicone
    Tuf-Lok coupling standard high temperature gasket (also food grade), rated to 350° F (176° C)

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    Tuf-Lok Ring Grip Pipe Couplings Series 688
    Tuf-Lok Ring Grip Pipe Couplings Series 688 Specifications
    * Working pressure and end load are total, including equivalent loads based on
    coupling properly assembled.

    Specifications subject to change. 

    Tuf-Lok Couplings
    Bulletin 150402-3
    (PDF file - 240K)
    French
    (PDF file - 260K)
    German
    (PDF file - 260K)
    Portuguese
    (PDF file - 145K)
    Chinese
    (PDF file - 326K)
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