UL 1478
Standard for Fire Pump Relief Valves

DETAILS
Edition Number:4SCC Approved:--
Edition Date:2004-05-13DOD Approved: --
Price Code:DANSI Approved: 2018-04-12
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover direct acting (spring loaded) and pilot operated fire pump relief valves of nominal 3/4 inch (19.05 mm) size and larger, intended for use in water supply systems for fire protection service.

    1.2 Requirements for the installation and use of these valves are included in the Standard for the Installation of Centrifugal Fire Pumps, NFPA 20.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurements
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION
          • 6 Sizes
          • 7 Maximum Set Pressure Rating
          • 8 Bodies and Bonnets
          • 9 Materials
          • 10 Valve Mechanisms
          • 11 Clearances
        • PERFORMANCE
          • 12 General
          • 13 Metallic Materials
          • 14 Elastomeric Parts (Except Gaskets) Test
          • 15 Leakage Test
          • 16 Hydrostatic Strength Test
          • 17 Operation and Reseat Test
          • 18 Flow Capacity Test
          • 19 Cycling Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 20 General
        • MARKINGS
          • 21 General
        • INSTRUCTIONS
          • 22 Installation Instructions and Capacity Data