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  • BSI
    BS EN ISO 4064-4:2025 Water meters for cold potable water and hot water - Non-metrological requirements not covered in ISO 4064-1
    Edition: 2025
    $435.81
    / user per year

Description of BS EN ISO 4064-4:2025 2025

This document applies to water meters used to meter the volume of cold potable water and hot water flowing through a fully charged, closed conduit. These water meters incorporate devices which indicate the integrated volume. This document specifies technical characteristics and pressure loss requirements for meters for cold potable water and hot water. It applies to water meters which can withstand: a)       a maximum admissible pressure (MAP) equal to at least 1 MPa1) [0,6 MPa for meters for use with pipe nominal diameters (DNs) ?500 mm]; b)       a maximum admissible temperature (MAT) for cold potable water meters of 30 °C; c)        a MAT for hot water meters of up to 180 °C, depending on class. In addition to meters based on mechanical principles, this document also applies to water meters based on electrical or electronic principles, and to water meters based on mechanical principles incorporating electronic devices, used to meter the volume flow of hot water and cold potable water. It also applies to electronic ancillary devices. As a rule ancillary devices are optional. However, national or international regulations may make some ancillary devices mandatory in relation to the utilization of the water meter. 1) 1 MPa = 10 bar (1 bar = 0,1 MPa =105 Pa; 1 MPa = 1 N/mm2).

Standard NumberBS EN ISO 4064-4:2025
TitleWater meters for cold potable water and hot water - Non-metrological requirements not covered in ISO 4064-1
StatusDefinitive
Publication Date2025-01-15
ReplacesBS EN ISO 4064-4:2014
Identical National Standard OfEN ISO 4064-4, ISO 4064-4
DescriptorsMeasurement, Liquid flow, Water supply (buildings), Flow measurement, Hot-water supply systems, Potable water, Certification (approval), Flowmeters, Cold-water supply systems, Water, Water-supply meters, Conduits (hydraulic), Approval testing
ICS91.140.60 Water supply systems
CommitteeCPI/30/7
ISBN978 0 539 25311 5
PublisherBSI
Pages36

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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