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eLibrary > BS EN 13433:2021 Devices to prevent pollution by backflow of potable water. Mechanical disconnector, direct actuated. Family G, type A >

BS EN 13433:2021 Devices to prevent pollution by backflow of potable water. Mechanical disconnector, direct actuated. Family G, type A, 2022

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BS EN 13433:2021 Devices to prevent pollution by backflow of potable water. Mechanical disconnector, direct actuated. Family G, type A, 2022

undefined
1 Scope
2 Normative references
3 Terms and definitions
4 Denomination
5 Designation
6 Symbolization
7 Physical-chemical characteristics [Go to Page]
7.1 General
7.2 Materials [Go to Page]
7.2.1 General
7.2.2 Dezincification resistant copper alloy
7.3 Surface of the body [Go to Page]
7.3.1 General
7.3.2 Epoxy Coating
7.3.3 Polyamide Powder based Coating
8 Design [Go to Page]
8.1 General
8.2 Relief valve/Obturator [Go to Page]
8.2.1 General
8.2.2 Mechanical Disconnector Family G, Type A
8.3 Disconnection distance
9 Characteristics and tests [Go to Page]
9.1 General
9.2 General tolerances [Go to Page]
9.2.1 Tolerance of set parameters
9.2.2 Accuracy of measuring instruments
9.3 Dimensional characteristics [Go to Page]
9.3.1 Connections
9.3.2 Pressure taps
9.4 Mechanical characteristics [Go to Page]
9.4.1 General
9.4.2 Mechanical resistance of the body under pressure [Go to Page]
9.4.2.1 Requirement
9.4.2.2 Procedure
9.4.3 Endurance [Go to Page]
9.4.3.1 Requirement
9.4.3.2 Procedures
9.4.4 Torque test of Captive rotating Nuts and Bending Strength – Tightness of the Body [Go to Page]
9.4.4.1 Requirement
9.4.4.2 Test method
9.5 Leak tightness characteristics [Go to Page]
9.5.1 Verification of the leak tightness of the downstream check valve in closing direction [Go to Page]
9.5.1.1 Requirement
9.5.1.2 Procedure
9.5.2 Verification of the leak tightness of check valve device (opening direction) [Go to Page]
9.5.2.1 Requirement
9.5.2.2 Procedure
9.5.3 Verification of the leak tightness of the upstream spring loaded obturator in drain position at low pressure (in the opening direction) [Go to Page]
9.5.3.1 Requirement
9.5.3.2 Procedure
9.6 Hydraulic characteristics [Go to Page]
9.6.1 Test rig – General circuit
9.6.2 Verification of the pressure loss as a function of flow rate [Go to Page]
9.6.2.1 Requirement
9.6.2.2 Procedure
9.6.3 Verification of the opening and closing pressures of relief valve [Go to Page]
9.6.3.1 Requirement
9.6.3.2 Procedure
9.6.3.3 Closing
9.6.4 Verification of the relief valve flow rate [Go to Page]
9.6.4.1 Requirement
9.6.4.2 Procedure
9.6.5 Compatibility with the products used for disinfection of water distribution systems [Go to Page]
9.6.5.1 Requirement
9.6.5.2 Procedure
9.6.6 Acoustic tests [Go to Page]
9.6.6.1 General
9.6.6.2 Procedure
10 Order of testing
11 Marking and technical documents [Go to Page]
11.1 General
11.2 Marking
11.3 Technical documents
12 Presentation at delivery
Annex A (informative)Examples of presentation of test results [Go to Page]

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BS EN 13433:2021 Devices to prevent pollution by backflow of potable water. Mechanical disconnector, direct actuated. Family G, type A, 2022

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