Piston Valves, Class 800#
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    Piston Valve Flanged End Class 800

    The Piston Valve (Forged, Flanged End, Class 800#) is engineered for critical shut-off and throttling applications, providing robust performance in high-pressure systems. Designed with a piston and sealing rings, this valve offers excellent sealing capabilities without relying on conventional seat designs.

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    Pressure Class

    800

    The piston valve’s unique design minimizes wear, enhances durability, and ensures tight sealing even in challenging service conditions. The forged construction provides superior strength and resistance to pressure, making it ideal for steam, high-temperature fluids, gases, and other demanding media.

    Specification

    Details

    Valve Size

    ½” (DN 15) to 2” (DN 50)

    Pressure Rating

    • Class 800# (Rated for 800 psi at 100°F/38°C)
    • Suitable for high-pressure applications involving steam, gas, and high-temperature liquids.

    Body Material

    • Forged Carbon Steel (ASTM A105) for general-purpose applications.
    • Forged Stainless Steel (ASTM A182 F304/F316) for corrosive environments and aggressive media.

    Temperature Rating

    Capable of handling temperatures up to 450°C (842°F), depending on the body and seat materials.

    Sealing Material

    • Graphite/Carbon Seals: Provide excellent resistance to high temperatures and steam.
    • PTFE Seals: Available for chemical and corrosive applications with lower temperature requirements.

    End Connections

    Flanged Ends conforming to ANSI B16.5 standards for Class 800 pressure ratings, ensuring secure and leak-tight connections.

    Design Standards

    • ANSI B16.34 for pressure-temperature ratings.
    • API 598 for testing and inspection standards.
    • ASME B16.5 for flanged end connections.
    • Forged Body Construction: Forged steel construction provides enhanced durability, superior strength, and resistance to high pressure and temperature, ensuring long-term reliable operation.
    • Piston and Seal Design: The valve features a cylindrical piston that moves between two metal seats with sealing rings, offering tight shut-off and preventing seat wear, particularly in high-temperature applications.
    • Flanged End Connections: Standard flanged ends conform to international standards (ANSI B16.5) for easy and secure installation, providing a leak-tight connection in high-pressure systems.
    • Non-Rising Stem: The non-rising stem design minimizes the space required for installation, making it ideal for applications with limited clearance.
    • Reduced Maintenance: The self-cleaning nature of the piston movement helps prevent debris accumulation, reducing the need for frequent maintenance and ensuring longer service life.
    • Leak-Free Performance: The valve provides tight shut-off due to the metal-to-metal seating combined with the sealing rings, ensuring no leakage even in high-pressure applications.