9Kamstrup A/S • 55122412_A1_GB_2019-03
MULTICAL® 803 & ULTRAFLOW®
3.4 Flow sensor position
Kamstrup flow sensors require neither straight inlet nor straight outlet to meet the Measuring
Instruments Directive (MID) 2014/32/EU, OIML R75:2002 and EN 1434:2015. A straight inlet section
will only be necessary in case of heavy flow disturbances before the meter. It is recommended to
follow the guidelines of CEN CR 13582.
A Recommended position.
B Recommended position.
C Unacceptable position due to risk of air
build-up.
D Acceptable position in closed systems.
E Ought not to be placed immediately after
a valve, with the exception of block valves
(ball valve type) which must be fully open
when not used for blocking.
F Ought not to be placed immediately before
or after a pump.
G Ought not to be placed immediately after a
double bend in two planes.
A
B
C
D
E
F
G
In order to avoid cavitation, the back pressure at the flow sensor (the pressure at the flow sensor
outlet) must be minimum 1.5 bar at q
p
(nominal flow) and minimum 2.5 bar at q
s
(maximum flow).
This applies to temperatures up to approx. 80 °C. The flow sensor must not be exposed to pressure
lower than the ambient pressure (vacuum).
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