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9.2 Installation position
NOTICE
▶ There is an arrow on the measurement channel of the
product symbolizing the direction of flow measurement.
The measurement device must be installed so that the
medium flows through it in the direction of the arrow.
TOP -> outlet
BOTTOM -> inlet
Fig.4: Ideal installation position of the product
To ensure gas is detected as quickly as possible, it is import-
ant to keep the line path between the storage tank and the
product as short as possible. Faultless measurement can only
be ensured if the line is filled completely and the liquid does
not outgas.
Deviating from this, it can be advantageous for dosing applic-
ations to position the product as closely as possible to the
dosing valve as the cross-sections of hose lines increase de-
pending on the system pressure. This can lead to differences
in reproducibility.
NOTICE
▶ It must be ensured that no gas elements dissolve out of
the medium. Depending on the liquid, sufficient back
pressure on the outlet of the product can prevent the li-
quid from outgassing. Suitable sealing material must be
used during assembly. The use of Teflon tape or similar
must be avoided.
Any carried solid matter can lead to measurement errors.
When using pumps, the product must be installed in the flow
direction behind the pump on the pressure side to ensure that
there is sufficient pressure. The maximum pressure rating of
the product must be taken into account.
Straight and uninterrupted inlet and outlet distances for the
product must be complied with for a correct volume flow
measurement. Dependent on the nominal size, these are at
least:
DN10 DN15 DN20 DN25 DN32 DN40 DN50
Inlet distance 10
cm
30
cm
40
cm
40
cm
40
cm
45
cm
60
cm
Outlet distance 0 cm 5 cm 10
cm
20
cm
20
cm
20
cm
20
cm
9.3 Installation of the measurement device
The measurement device is installed using the process con-
nections in the pipe or tube line. To ensure optimal degassing,
we recommend mounting the product vertically in the line.
The device must not be mounted behind an outlet valve as it
can run empty otherwise. To prevent gas diffusion and blister
formation of the medium during flow measurement, the
product must always be installed on the pressure side of the
system pump.
GEMÜ 3040
Valve
Container
Process valve
Pump
GEMÜ 3040
Fig.5: Installation situation
9 Installation in piping
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