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About This Item


Full Description

Describes methods of determining the seat tightness of metal- and soft-seated pressure relief valves, including those of conventional, bellows, and pilot-operated designs.

Document History

  1. API Std 527

    Seat Tightness of Pressure Relief Valves, Fourth Edition

    • Most Recent
  2. API Std 527 (R2007)


    Seat Tightness of Pressure Relief Valves

    • Historical Version