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    API/ASME VIII Series Spring Safety Valve

    Compact structure, beautiful appearance, precision casting, and smooth surface. Split type is adopted for valve seat and valve body to facilitate assembly/disassembly and maintenance. Reasonably designed disc holder and adjusting ring make the safety valve open rapidly and reseat timely; the valve seat and valve clack are coated with hard alloy by build-up welding to achieve good wear and erosion resistance and reliable seal, and prolong the service life. Spring is prestressed at constant temperature with stable rigidity and small deviation in set-pressure.

    Model: A21 A11 A27 A28 A41 A42 A47 A48 A61 A62 A67 A68

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    Design and manufacture standard:  Design and manufacture standard:
    Design standard: ASME VIII, API520
    Structure length: API526
    Inside nominal diameter: 1/2”-20”
    Pressure range: 150LB-2500LB


    Key feature:
    Compact structure, beautiful appearance, precision casting, and smooth surface.

    The valve seat is separable to the valve body for easy maintenance.
    The umbrella-type disc holder works with valve seat adjusting ring for adjustment, which can effectively increase the lift force, so that the valve can be fully opened rapidly at a low overpressure to discharge media;
    The valve can rapidly reseat after overpressure relief to reach satisfactory blowdown.

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