Standard
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AS 4795.1-2011
[Current]Sets out requirements for PN 10 and PN 16 manually operated resilient-seated wafter and lugged butterfly valves for waterworks purposes, with a maximum operating temperature of 40 degrees Celsius.
Published: 27/05/2011
Pages: 26
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Product comformity evaluation to the standard
1.3 Normative references
1.4 Terms and definitions
1.5 Designation of size
1.6 Allowable operating pressures
2 Materials and components
2.1 General
2.2 Corrosion-resistant materials
2.3 Contamination of water
2.4 Elastomeric components
3 Design
3.1 General
3.2 End connections
3.2.1 General
3.2.2 Wafer
3.2.3 Tapped lugged
3.3 Component design
3.3.1 Castings
3.3.2 External drainage holes
3.3.3 Face-to-face dimensions
3.3.4 Seal
3.3.5 Shaft
3.3.6 Shaft sealing and ingress
3.3.7 Shaft bearings
3.4 Operation
3.4.1 General
3.4.2 Handle and notch plate
3.4.3 Spindle cap and key
3.4.4 Extension spindles
3.4.5 Gearboxes
3.4.6 Torque-limiting device
3.4.7 Lockout devices
3.5 Lifting device
3.6 Fasteners
4 Protective coatings
4.1 General
4.2 Components
5 Testing
5.1 General and test sequence
5.1.1 General
5.1.2 Test sequence
5.1.2.1 Performance tests
5.1.2.2 Production testing
5.2 Performance tests
5.2.1 Body strength test (Test A)
5.2.2 Free-end test (Test B)
5.2.3 Disc strength test (Test C)
5.2.4 Shaft strength test (Test D)
5.2.5 Valve operational test (Test E)
5.2.6 Sealing test (Test F)
5.2.7 Final inspection
5.3 Production tests
5.3.1 Coating test (Test 1)
5.3.2 Body strength test (Test 2)
5.3.3 Free-end test (Test 3)
5.3.4 Seating test (Test 4)
5.3.5 Reverse seating test (Test 5)
6 Marking and packaging
6.1 Marking
6.1.1 On body of valve
6.1.2 Nameplate or label
6.2 Direction of closure for handwheels and caps
6.3 Packaging
Appendix A
A.1 Scope
A.2 Relevance
A.3 Testing
A.3.1 General
A.3.2 Testing
A.3.3 Retesting
Appendix B
B.1 General
B.2 Purchaser options
B.3 Information to be supplied by the purchaser
Appendix C
C.1 Scope
C.2 Surface preparation
C.3 Coating system
C.4 Application and finish
Bibliography
Amendment Control Sheet
Amendment No. 2 (2021)
Correction amendment
Cited references in this standard
[Current]
Site testing of protective coatings, Method 3: Determination of dry film thickness
[Current]
Methods of test for elastomers, Method 15.1: International rubber hardness
Content history
[Current]
[Current]
[Superseded]
AS 4795.1-2011 REC:2022
DR AS 4795.1