Standard
Track updates
AS 5081-2008
[Current]Hydraulically operated automatic control valves for waterworks purposes
Provides material requirements and performance tests for metallic-bodied hydraulically operated automatic control valves for waterworks purposes, together with default compliance requirements for use by manufacturers and certification bodies.
Published: 30/06/2008
Pages: 29
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Application
1.3 Normative references
1.4 Definitions
1.5 Types and functions
1.5.1 General
1.5.2 Fixed-outlet pressure-reducing valve
1.5.3 Variable-outlet pressure-reducing valve
1.5.4 Pressure-sustaining/relief valve
1.5.5 Surge-anticipating valve
1.5.6 Altitude valve
1.5.7 Float valve
1.5.8 Rate-of-flow control valve
1.5.9 Non-return valves
1.5.10 Dual-solenoid control valves
1.5.11 Single-solenoid control valve
1.5.12 Double-chamber arrangement
1.5.13 Full port valve
1.5.14 Reduced-port valve
1.5.15 V-port throttling plug
1.5.16 Anti-cavitation trim
1.6 Designation of size
1.7 Allowable pressures
2 Materials and components
2.1 General
2.2 Corrosion-resistant materials
2.3 Dezincification-resistant materials
2.4 Effect on water
2.5 Elastomeric components
2.6 Plastics components
3 Design
3.1 General
3.2 End connections
3.3 Main valve
3.3.1 Castings
3.3.2 Body
3.3.3 Cover
3.3.4 Body and cover tapping
3.3.5 Body-to-cover connection
3.3.6 Stem seals
3.3.7 Diaphragm assembly
3.3.8 Stem guide
3.3.9 Seat ring
3.3.10 Resilient seal
3.3.11 Operating mechanism
3.3.12 Spring
3.3.13 Position indicator
3.3.14 Lifting devices
3.3.15 Fasteners
3.4 Hydraulic control system
3.4.1 General
3.4.2 Strainer/filter
3.4.3 Pilot valves
3.4.4 Speed-control valves
3.4.5 Hydraulic accelerators
4 Protective coatings
4.1 General
4.2 Design
5 Performance tests
5.1 General
5.2 Type tests—Static tests
5.2.1 General
5.2.2 Test 1: Body test
5.2.3 Test 2: Seat test
5.2.4 Test 3: Opening test
5.2.5 Test 4: Closing test
5.2.6 Test 5: Endurance test
5.3 Type tests—Dynamic tests
5.3.1 General
5.3.2 Test 6: Control precision
5.3.3 Test 7: Pilot valve adjustment for increasing pressure set-point
5.3.4 Test 8: Pilot valve adjustment for decreasing pressure set-point
5.3.5 Test 9: Response to gradual flow increase
5.3.6 Test 10: Response to gradual flow reduction
5.3.7 Test 11: Minimum controllable flow
5.3.8 Test 12: Response to rapid flow increase
5.3.9 Test 13: Response to rapid flow decrease
5.4 Batch release tests
5.4.1 General
5.4.2 Test 1: Coating test
5.4.3 Test 2: Body test
5.4.4 Test 3: Seat test
5.4.5 Test 4: Opening test
5.4.6 Test 5: Closing test
6 Marking and packaging
6.1 Marking
6.1.1 On body of valve
6.1.2 Nameplate or label
6.2 Packaging
Appendix A
A1 Scope
A2 Relevance
A3 Product cetification
A4 Testing
A4.1 General
A4.2 Retesting
A4.3 Rejection after retest
Appendix B
B1 General
B2 Information to be supplied by the purchaser
B3 Information to be supplied by the manufacturer
Appendix C
Appendix D
Appendix E
E1 Scope
E2 Surface preparation
E3 Materials
E4 Application and finish
Cited references in this standard
[Current]
Copper and copper alloys — Compositions and designations of refinery products, wrought products, ingots and castings
Content history
DR 07297
AS 5081-2008 Rec:2016
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