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