I. INTRODUCTION
II. GENERAL REQUIREMENTS
     2.1 Glossary
     2.2 Instructional Manual
     2.3 Marketing
     2.4 Markings
     2.5 Sizes
     2.6 Rated Working Pressure
     2.7 Factory Tests
III. DESIGN
     3.1 Waterway
     3.2 Orientation
     3.3 Visibility
     3.4 Design Factors of Safety
     3.5 Water Hammer
     3.6 Operation
     3.7 Ease of Operation
     3.8 Serviceability
     3.9 Impact Resistance (Shock Loading)
     3.10 Friction Loss
     3.11 Locking
     3.12 Seat Leakage
     3.13 Materials
     3.14 Post Design
IV. TESTS
     4.1 General
     4.2 Visibility
     4.3 Water Hammer
     4.4 Loss of Power Transmission Control
     4.5 Hydrostatic Test
     4.6 Seat Leakage
     4.7 Impact Resistance
     4.8 Durability
     4.9 Friction Loss
     4.10 Stem Seal
     4.11 Other