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    Guardian II Metal Bellows Seal

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    The Flowserve Guardian II Metal Bellows Seal control valve eliminates valve leakage using a formed metal bellows design with minimal welded joints.

     

    The Guardian II provides a full-cycle life of up to 5 million cycles, ensuring years of safe and reliable operation in hazardous processes, withstanding temperatures ranging from -320°C to 538°C.

     

    The valve features a metal shroud that acts as a pressure boundary, allowing the use of a single, pressurized gasket seal and preventing fluid contact with the bellows housing during normal operation.

     

    It can be retrofitted to a standard Mark One valve by changing the plug and bolting, adding a bellows assembly, bellows housing, and lower guide assembly.

    • Specifications
    • Advantages
    • Industries
    • Applications
    • Documents
    • Contact

    Specifications

    • Temperature range: -320° to 1000° F (-196° to 538° C)
    • Pressure range: Up to 1100 psi (75.8 Bar)
    • Full-cycle life: Up to 5 million cycles
    • Design: Formed metal bellows with minimal welded joints
    • Compatibility: Retrofit to standard Mark One valve

    Advantages

    • Full-cycle life of up to 5 million cycles
    • Wide selection of materials available
    • External pressurization increases cycle life and maximum allowable pressure
    • Prevents “bellows squirm”
    • Replaceable plug head allows trim changes without changing the bellows assembly

    Industries

    • Volatile Organic Compounds
    • Leaching Acid
    • Bleach Chemicals
    • Acid Transfer

    Applications

    • Acid Transfer
    • Chemical Processing
    • Chlor-alkali
    • Difficult-to-Seal Liquids
    • Inorganic Chemicals
    • Safety Systems
    • Toxic Services

    Documents

    Contact Us

    Contact our Valve Specialist Team

    • Brendan Merrigan (External) – mob: 087 2598124
    • Vicki McGrath – tel: 021 461 7207
    • Brian Barry – tel: 021 461 7211
    • Tim Quigley – tel: 021 461 7209
    • Ross O’Donovan – tel: 021 461 7230
    • Shauna O’Connor – tel: 021 461 7237
    • Cathal Hannon - Tel: 021 461 7200
    • Office - tel: 021 461 7200

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