EN 13443-1 pdf free download
EN 13443-1 pdf free download. Water conditioning equipment inside buildings – Mechanical filters – Part 1: Particle rating 80 µm to 150 µm – Requirements for performances, safety and testing.
Water conditioning equipment inside buildings – Mechanical filters – Part 1: Particle rating 80 µm to 150 µm – Requirements for performances, safety and testingThe selection of materials shall be the responsibility of the manufacturer, provided that the complete filter satisfies the requirements of EN 1567. NOTE The materials and coatings used should not contaminate or change the drinking water, when in normal or accidental contact up to the maximum designed temperature. The requirements , with regard to the effects of materials on drinking water quality, are specified in national regulations. The manufacturer shall state in his technical literature what materials and coatings are used. The materials, in particular copper alloys, shall conform to relevant national standards or recommendations. These references shall be stated. Copper-zinc alloys containing more than 10 % zinc are subject to dezincification when submitted to water capable of dezincification. In countries where the use of products made of dezincification resistant material is required, the product have to guarantee a dezincification depth less than 200 µm in any direction. They have to be tested and marked in accordance with EN ISO 6509 and have to be marked in compliance with the indications under clause 9 of the present standard. 6 General design requirements 6.1 Backwashable filters Backwashable filters shall be able to be cleaned without the aid of tools. No substances shall be allowed to penetrate into the drinking water supply as a result of the cleaning operation. After completion of backwashing, the original grade of filtration and pressure drop shall be recovered. Backwashable filters shall be provided with a backwash water outlet, conforming to EN 1717. It shall be possible to clean the filter mounted in any of the positions specified by the manufacturer with no interruption of filtered water supply during backwashing. 6.2 Single-use filters Single use filters shall be designed in such a way that the filter elements can be replaced without any risk of contamination of the drinking water. It shall be possible to replace the filter mounted in any of the positions specified by the manufacturer. Any tools used in this process shall not come into contact with drinking water and shall be provided by the manufacturer. If specific tools are necessary they shall be supplied by the manufacturer. Replacement filter elements shall be single packaged to prevent contamination from outside. 6.3 Thermal stability Filters shall be designed to withstand room and water temperatures of at least 30°°C. The test assembly is shown in Figure 4. Connect the filter (5) in accordance with the manufacturer’s instructions supplied with the filter. Install the filter between two sensors for pressure measurement (3) connected to adequately sized manometers (4) (error limit 2 kPa ! deleted text ” ). Alternatively, a differential pressure gauge (4) can be used. If the appliance is fitted with a shut off valve, open it fully. Adjust the flow rate by means of the regulating valve (1) installed downstream of the filter. Measure the differential pressure at a range (e.g. 10) of flow rates in order to generate a pressure drop curve (curve A, Figure 5). In order to determine the pressure drop curve for the filter itself, repeat the above procedure with the filter removed (curve B). The filter pressure drop (curve C) is obtained by subtracting curve B from curve A.EN 13443-1 pdf download.
