BS EN 15096 pdf free download

BS EN 15096 pdf free download. Devices to prevent pollution by backflow of potable water – Hose Union anti-vacuum valves – DN 15 to DN 25 inclusive Family H, type B and type D – General technical specification.
2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1717:2000, Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow EN 13959, Anti-pollution check valves一DN 6 to DN 250 inclusive family E, type A, B, C and D EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads一Part 1: Dimensions, tolerances and designation (ISO 228-1) EN ISO 3822-1, Acoustics一Laboratory tests on noise emission from appliances and equipment used in water supply installations一Part 1: Method of ‘measurement (ISO 3822-1) EN ISO 3822-3, Acoustics一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 (ISO 3822-3) EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full一Part 1: General principles and requirements (ISO 5167-1) EN ISO 6509-1, Corrosion of metals and alloys一Determination of dezincification resistance of copper alloys with zinc一Part 1: Test method (ISO 6509-1) EN 248, Sanitary tapware一General specification for electrodeposited coatings of Ni-Cr 3 Terms and definitions For the purposes of this document, the terms and definitions in EN 1717:2000 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http://www.electropedia.org/ ISO Online browsing platform: available at https://www.iso.org/obp 3.1 hose union anti-vacuum valve HB valve equipped with air inlet ports, which are closed at zero flow and when water flows in the intended direction above atmospheric pressure Note 1 to entry: The air inlets are opened if there is subatmospheric pressure at the water inlet and closed to be watertight again when the supply lines are back to at least atmospheric pressure Note 2 to entry: For the purpose of this standard, “hose union anti-vacuum valve(s)” are hereafter referred to as “device(s)” 3.2 hose union anti-vacuum valve HD valve HB with integrated check valve EB located upstream (monoblock/combined products e.g. frost taps) NOTE For the purpose of this standard, “hose union anti-vacuum valve(s)” are hereafter referred to as “device(s)” 4 Nominal size The nominal size of the devices (DN designated) shall correspond to the nominal size of the threaded inlet connection according to Table 1. 10.3.1 Procedure Check by visual verification that: a) test device conform with the description and the appropriate drawings of the manufacturer; b) dimensional requirements of this document are met; c Air inlets are shrouded and directed downward and designed to ensure that they cannot easily be blocked by deposits. 10.3.2 Verification of the dimensional requirements of air inlets a) if the shroud is not part of the body of the HB, the air openings shall have a clearance of at least 2 mm (d1, see Figure 2 annular slits), b) air passages relating to air inlets shall have a width (dz, see Figure 2] of not less than 4 mm at any point with the exception of annular slits (d, see Figure 2), which shall have a minimum width of 2 mm, c a clearance [C, see Figure 2] of at least 4 mm shall be maintained between the air intake orifice and any projections and shoulders and/or end threads.BS EN 15096 pdf download.