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GRAPHALLOY®
Parts for Pump Reliability & Safety

GRAPHALLOY works in temperatures ranging from -450F to over 1000F (-267C to over 540C).  It is corrosion resistant and performs in conditions where metal or polymer wear parts fail. Our US-based manufacturing facility can install the Graphalloy for you in your own metal rings or can provide a turnkey ring assembly ourselves.

We take pride in our quick turnaround time, with our lead times quoted in days or weeks, not months. Email sales@graphalloy.com today.

GRAPHALLOY 'Disaster' Bushings for Improved Safety in Case of Seal Failure

“Disaster Bushings” are used in pumps outside the seal to minimize product leakage to the environment in the event of a seal failure.  GRAPHALLOY disaster bushing for pumps


There are several properties of GRAPHALLOY material that make it an excellent candidate for these applications:

    • TIGHTER CLEARANCES: Graphalloy can be used with very tight clearances, allowing any leaked fluid from the seal to be directed through the appropriate drain.
    • NON GALLING: Graphalloy is solid, uniform material. It is non-galling and self-lubricating.  It is not a surface coating and therefore will not chip off.  As Graphalloy is the “sacrificial part”, if the shaft comes in contact, it will not be damaged.
    • LOW COEFFICIENT OF THERMAL EXPANSION: Thermoplastics or metal wear parts used for “disaster bushings” need to be designed to handle a rapid rise in temperature from hot service fluid coming in contact or from touch-off against the shaft.  This means designing with wider clearances, partially defeating their purpose.  Graphalloy’s low coefficient of thermal expansion relative to metal or thermoplastic means it won’t expand under the high temperatures and can be designed with extremely tight clearances, resulting in more effective leak protection.

     

    GRAPHALLOY disaster bushing pump diagram

     

    pdf Click to download the informational sheet