6
Kamstrup A/S • 55121351_D2_GB_04.2015
MULTICAL® 302
4 Mounting of flow sensor
Prior to installation of the flow sensor, the
system should be flushed and protection
plugs/plastic diaphragms removed from the
flow sensor.
Correct flow sensor position (inlet or outlet)
appears from the display of MULTICAL® 302.
The flow direction is indicated by an arrow on
the side of the flow sensor.
The flow sensor may be used in both PN16 and
PN25 installations and is available marked
either PN16 or PN25 or marked both PN16 and
PN25, as required.
A
A
SECTION A-A
SCALE 2 : 1
Tightening by hand
O-ring
Gasket
12 mm
Enclosed couplings, if any, are only intended for PN16. Suitable PN25 couplings must be used in
PN25 installations.
In connection with G¾x110 mm, it must be checked that 12 mm thread run-out is sufficient. See
figure below.
Straight inlet: MULTICAL® 302 requires neither straight inlet nor straight outlet to meet the Mea-
suring Instruments Directive (MID) 2004/22/ EF and EN 1434:2007. A straight inlet section is only
necessary in case of heavy flow disturbances before the meter. It is recommended to follow the
guidelines of CEN CR 13582.
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
E
A flow sensor should not be placed
immediately after a valve, except for block
valves, which must be fully open when not
used for blocking
F
A flow sensor should not be placed close to
the inlet side of a pump
G
A flow sensor should not be placed close to
a two-level double bend.
A
B
C
D
E
F
G
In order to prevent cavitation, the operating pressure at MULTICAL® 302 must be min. 1 bar at q
p
and min. 2 bar at q
s
. This applies to temperatures up to approx. 80 °C.
MULTICAL® 302 must not be exposed to pressure lower than the ambient pressure (vacuum).