1 INTRODUCTION
  1.1 Purpose
  1.2 Scope
  1.3 Basis for Requirements
  1.4 Basis for Approval
  1.5 Basis for Continued Approval
  1.6 Effective Date
  1.7 System of Units
  1.8 Applicable Documents
  1.9 Definitions
2 GENERAL INFORMATION
  2.1 Product Information
  2.2 Approval Application Requirements
  2.3 Requirements for Samples for Examination
3 GENERAL REQUIREMENTS
  3.1 Review of Documentation
  3.2 Physical or Structural Features
  3.3 Clearances
  3.4 Materials
  3.5 Markings
  3.6 Manufacturer's Installation and Operation Instructions
  3.7 Calibration
4 PERFORMANCE REQUIREMENTS
  4.1 Examination
  4.2 Clapper Strength
  4.3 Resilient Seat (Reverse Flow) Leakage
  4.4 Metal-To-Metal Seat Leakage
  4.5 Hydrostatic Strength - Alarm Check Valve
  4.6 Hydrostatic Strength - Trim Piping
  4.7 Friction Loss Determination
  4.8 Cycle Test
  4.9 Bonding Adequacy
  4.10 Water Absorption
  4.11 Aging
  4.12 Minimum Operational Flow Test
  4.13 Sensitivity Test
  4.14 Additional Tests
5 OPERATIONS REQUIREMENTS
  5.1 Demonstrated Quality Control Program
  5.2 Facilities and Procedures Audit (F&PA)
  5.3 Manufacturer's Responsibilities
  5.4 Manufacturing and Production Tests
APPENDIX A: UNITS OF MEASUREMENT
APPENDIX B: FM APPROVED MARKS
APPENDIX C: DRAWINGS
  Figure C-1. Periphery of the Clapper and the Inside of
              the Body Clearances
  Figure C-2. Hub of the Clapper Arm and Inside of the
              Body Clearances
  Figure C-3. Hinge Pin Clearances
APPENDIX D: TEST SET-UP DIAGRAM
APPENDIX E: SAMPLE LISTING