6.3 Straight inlet
MULTICAL
®
Optimal position can be obtained if you take the below-mentioned installation methods into consideration:
402 neither requires straight inlet nor straight outlet to meet the Measuring Instruments Directive
(MID) 2004/22/ EC, OIML R75:2002 and EN 1434:2009. A straight inlet section will only be necessary in case of
heavy flow disturbances before the meter. We recommend to follow the guidelines of CEN CR 13582.
Figure 10
For general information concerning installation see CEN report DS/CEN/CR 13582, Heat meter Installation.
Instructions in selection, installation and use of heat meters.
A Recommended flow sensor position
B Recommended flow sensor position
C Unacceptable position due to risk of air
build-up
D Acceptable position in closed systems.
Unacceptable position in open systems
due to risk of air build-up
E A flow sensor should not be placed
immediately after a valve, except for block
valves (ball valve type), which must be
fully open when not used for blocking
F A flow sensor must never be placed on the
inlet side of a pump
G A flow meter should not to be placed after
a two-level double bend
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