عدادات ماء الشرب البارد والساخن - الجزء الرابع: المتطلبات غير المترولوية غير المغطاة في المواصفة القياسية ISO 4064-1
Water meters for cold potable water and hot water — Part 4: Non-metrological requirements not covered in ISO 4064-1
This part of ISO 4064 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 part of ISO 4064 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 part of ISO 4064 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.
Purpose & Justification