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Specification Review

swing check valve vs spring check valve

Before treating a swing check valve vs spring check valve comparison as settled, lock closing behavior, permitted orientation, face-to-face drawings and which seat-leakage or pressure-test records the owner will witness. A hinged disc and an axial spring-assisted design are not interchangeable on the same envelope until a named manufacturer answers those items. This page is a procurement dossier. It is not an engineering stamp or a slam-prevention guarantee.

Decision topic: Decision dependencies

sustainability evidence review

Decision dependencies

  1. Input dependency

    Required input
    NPS or DN, ASME pressure class, flanged or butt-weld ends, body and trim, fluid, working pressure, temperature, flow, reverse-flow / shutdown transient, and permitted orientation including whether a vertical line is even allowed.
    Owner
    The buyer owns process data and installation geometry. The quoting manufacturer owns whether a hinged swing disc or a spring-assisted design can close under that transient without claiming this site certified the result.

  2. Review dependency

    • Face-to-face and cover-access envelope must match the drawing attached to the offer, not a family-range catalog table.
    • Unresolved: who signs seat-leakage and hydrostatic records, and whether FAT witness is included or separately quoted.

Resolve closing method before awarding

Discuss Your Requirements