AS/NZS 2638.2:2011 GATE VALVES FOR WATERWORKS PURPOSES - RESILIENT SEATED
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 NORMATIVE REFERENCES
1.4 DEFINITIONS
1.4.1 Allowable operating pressure (AOP)
1.4.2 Allowable site test pressure (ASTP)
1.4.4 Bulkhead test
1.4.5 Bypass arrangement
1.4.6 Coating
1.4.7 Coating defect
1.4.8 Distortion
1.4.9 DN (nominal size)
1.4.10 Effective length
1.4.11 Face to face dimensions
1.4.12 Free end test
1.4.14 Maximum allowable gearbox input torque
1.4.15 Maximum allowable operating pressure (MAOP)
1.4.16 Maximum functional test torque
1.4.17 Maximum operator input torque
1.4.18 Maximum possible input torque
1.4.19 Maximum operating temperature
1.4.20 Minimum strength test torque
1.4.21 Non-rising spindle design
1.4.22 Pressure classification (PN)
1.4.23 Production batch
1.4.24 Rising spindle design
1.4.26 Sampling plan
1.4.27 Type test
1.4.30 Production test
1.4.31 Seal retainer housing
1.4.32 Spindle seal retainer
1.5 DESIGNATION OF SIZE
1.6 ALLOWABLE PRESSURES
SECTION 2 MATERIALS AND COMPONENTS
2.1 MATERIALS
2.2 COPPER ALLOY COMPONENTS
2.3 CONTAMINATION OF WATER
2.4 SEALS
SECTION 3 DESIGN
3.1 GENERAL
3.2 DIMENSIONS
3.3 END CONNECTIONS
3.3.1 General
3.3.2 Flanged ends
3.3.3 Socket ends
3.3.4 Spigot ends
3.3.5 Shouldered or grooved ends
3.4 GATE
3.4.1 Coating
3.4.2 Gate guides
3.4.3 Gate travel
3.5 COMPONENT JOINTING
3.5.1 Connections
3.5.2 Fasteners
3.6 WATERWAY
3.7 SPINDLE
3.7.1 Spindle diameter
3.7.2 Spindle thread
3.7.3 Spindle sealing
3.7.4 Thrust collar
3.7.5 Spindle seal retainer
3.8 OPERATION
3.8.1 General
3.8.2 Spindle cap and key
3.8.3 Extension spindle
3.8.4 Handwheels
3.8.5 Direction of closure
3.9 LIFTING DEVICES
3.10 SUPPORT FEET
3.11 BYPASS ARRANGEMENTS
SECTION 4 COATINGS
4.1 GENERAL
4.2 DESIGN
SECTION 5 TESTING
5.1 TYPE TESTS
5.1.1 General
5.1.2 Strength test (thrust collar, spindle, nut and cap) (Test A)
5.1.3 Body pressure test (Test B)
5.1.4 Gate strength test (Test C)
5.1.5 Torque test (Test D)
5.1.6 Valve seat test (Test E)
5.1.7 Sensitivity test (Test F)
5.1.8 Functional test (Test G)
5.1.9 Spindle seal replacement or repair test (Test H)
5.1.10 Final inspection
5.1.11 Cyclic flow test (Test I)
5.1.12 Endurance cyclic flow test (Test J)
5.1.13 Gate rubber adhesion test (Test K)
5.1.14 Strength test (valve key) (Test L)
5.1.15 Strength test (spindle extension) (Test M)
5.2 PRODUCTION TESTS
5.2.1 General
5.2.2 Body test (Test 1)
5.2.3 Valve seat test (Test 2)
5.2.4 Coating tests
SECTION 6 GEARBOXES
6.1 DESIGN
6.1.1 Gearbox
6.1.2 Gearbox selection
6.1.3 Geared valves
6.2 COATINGS
6.3 MARKINGS
SECTION 7 MARKING AND PACKAGING
7.1 BODY MARKING
7.2 VALVE KEY AND SPINDLE EXTENSION MARKING
7.3 DIRECTION OF CLOSURE MARKING FOR HANDWHEELS AND CAPS
7.4 PACKAGING
APPENDIX A - MEANS FOR DEMONSTRATING CONFORMITY WITH THIS STANDARD
A1 SCOPE
A2 RELEVANCE
A3 TESTING
A3.1 General
A3.2 Testing
A3.3 Retesting
APPENDIX B - PURCHASING GUIDELINES
B1 GENERAL
B2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
B3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER
B4 MATTERS FOR AGREEMENT BETWEEN THE PURCHASER AND THE MANUFACTURER
APPENDIX C - ALTERNATIVE MATERIAL REQUIREMENTS
C1 GENERAL
APPENDIX D - GUIDELINES FOR GEARBOX SELECTION AND APPLICATION
D1 GENERAL
D2 INFORMATION REQUIRED FOR GEARBOX SELECTION
D3 TORQUE REQUIREMENTS OF A VALVE
D3.1 General
D3.2 Torque to seal
D3.3 Running torque
D4 STANDARD GEARBOX RATIOS
D5 GEAR RATIO SELECTION
D6 FINAL CHECK
BIBLIOGRAPHY
