ULTRAFLOW®54(H)/(J)
KamstrupA/S∙TechnicalDescription∙5512‐1554_J1_GB_04.2018
23
7.2 Inlet requirements
ULTRAFLOW
®
requires 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 sensor. It is recommended to follow the guidelines based on CEN CR 13582.
Optimal position can be obtained if you take the below-mentioned installation methods into consideration:
Figure 11
For general information on installation, see CEN report CEN/CR 13582, Heat meter installation. Instructions in
selection, installation and use of heat meters.
7.3 Operating pressure
In order to prevent cavitation the back pressure (the pressure at the flow meter outlet) at ULTRAFLOW
®
must be for
q
p
0.6…2.5 m
3
/h (q
p
≥ 3.5 m
3
/h) min. 1.0 bar (1.5 bar) at q
p
and min. 2.0 bar (2.5 bar) at q
s
. This applies to
temperatures up to approx. 80 °C. ULTRAFLOW
®
must not be exposed to pressure lower than the ambient pressure
(vacuum). For further information on operating pressure, see paragraph. 8.4 Guidelines for dimensioning
ULTRAFLOW
®
.
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 in
the system.
E A flow sensor ought 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 ought not be placed
directly before (suction side) or
directly after (outlet side) a pump.
G A flow sensor ought not be placed
immediately after a double bend in two
levels.
To Next Page
Loading...
Need help?
General
