This European Standard specifies, the dimensional, the physico-chemical, the design, the hydraulic, the mechanical and the acoustic characteristics of mechanical disconnector, hydraulic actuated Family G, type B.
This European Standard is applicable to mechanical disconnectors hydraulic actuated in nominal sizes DN 8 up to DN 250, intended to prevent the return of water having lost its original sanitary and drinking qualities (called "polluted water" in this European Standard), into the potable water distribution system whenever the pressure of the latter is temporarily lower than in the polluted circuit.
This European Standard covers the mechanical disconnectors hydraulic actuated of PN 10 that are capable of working without modification or adjustment:
at any pressure up to 1 MPa (10 bar);
with any pressure variation up to 1 MPa (10 bar);
in permanent duty at a limit temperature of 65 °C and 90 °C for 1 h maximum.
It specifies also the test methods and requirements for verifying these characteristics, the marking and the presentation at delivery.
BS EN 13434:2006 Referenced Document
EN 1092-1 Flanges and their joints - Circular flanges for pipes@ valves@ fittings and accessories@ PN designated - Part 1: Steel flanges*， 2018-04-01 Update
EN 1092-2 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 2: Cast iron flanges*， 2023-11-29 Update
EN 13959 Anti-pollution check valves - DN 6 to DN 250 inclusive family E, type A, B, C and D*， 2024-04-18 Update
EN 1717:2000 Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow*， 2024-04-18 Update
EN 806-1:2000 Specifications for installations inside buildings conveying water for human consumption - Part 1: General
EN ISO 228-1 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation ISO 228-1: 2000
EN ISO 3822-1 Acoustics - Laboratory tests on noise emission from appliances and equipment used in water supply installations - Part 1: Method of measurement - Amendment 1: Measurement uncertainty (ISO 3822-1:1999/Amd 1:2008)*， 2008-12-15 Update
EN ISO 3822-3:1997 Acoustics - Laboratory Tests on Noise Emission from Appliances and Equipment Used in Water Supply Installations - Part 3: Mounting and Operating Conditions for In-Line Valves and Appliances Incorporates Amendment A1: 2009
EN ISO 5167-1 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1:2022)*， 2022-06-29 Update
EN ISO 6509 Corrosion of Metals and Alloys - Determination of Dezincification Resistance of Brass (ISO 6509:1981)
ISO 9227 Corrosion tests in artificial atmospheres — Salt spray tests — Amendment 1: Footnote of Warning*， 2024-02-19 Update
BS EN 13434:2006 history
2021BS EN 13434:2021 Devices to prevent pollution by backflow of potable water - Mechanical disconnector, hydraulic actuated - Family G, type B
2007BS EN 13434:2007 Devices to prevent pollution by backflow of potable water - Mechanical disconnector, hydraulic actuated - Family G, type B
2007BS EN 13434:2006 Devices to prevent pollution by backflow of potable water - Mechanical disconnector, hydraulic actuated - Family G, type B