CEI UNI EN/ISO 4064-4

BILINGUAL * SAME AS ISO 4064-4

The part of ISO 4064
specifies technical characteristics and pressure los 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 MPA 1) [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 made some ancillary devices mandatory in relation
to the utilization of the water meter.