Measuring Liquids Containing Abrasive Or Other Particles; Inlet And Outlet Conditions - Siemens SITRANS F US SONOFLO Handbook

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SITRANS F US SONOFLO
Measuring liquids contain-
ing abrasive or other
particles

Inlet and outlet conditions

2. Choice of measuring site
SFIDK.PS.029.V3.02 - 521H0553
The sensor should be mounted in vertical or
inclined pipe position to minimize wear.
To maximize performance inlet and outlet must
be straight. There must be a certain distance
between meter and bends, pump and valves. It
is also important to centre the flowmeter in
relation to pipe flanges and gaskets.
Valves must always be installed after the flow-
meter. The only exception is installation of the
sensor in a vertical pipe. In this case a valve
below the sensor is necessary to allow zero-
point adjustment. It is important to select a valve
which does not alter the flow when fully open.
Recommended inlet:
Fully open valve, i.e. no flow restriction:
min. 10 × pipe diameter
Partially open valve: min. 40 × pipe diameter
Pumps: min. 20 × pipe diameter
Bends: min. 20 × pipe diameter
Recommended outlet: 3 × pipe diameter
If more bends than one, please contact Sie-
mens Flow Instruments for advice.
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