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VA Master FAM540
METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
7
Installation
Installation conditions
• The installation recommendations of VDI / VDE Directive
3513 must be observed.
• The flowmeter is installed vertically in the piping. The
measuring media must flow from bottom to top.
• Keep the device as far away as possible from pipe vibrations
and powerful magnetic fields.
• The nominal diameter of the piping should be the same as
the connection nominal diameter.
• Inlet and outlet sections are generally not required. Care
should be taken to avoid flow turbulence, pulsations,
pressure shocks and other flow instabilities in order to
prevent measuring inaccuracies, increased wear or damage.
• When selecting devices, pay close attention to the chemical
resistance of the wetted parts of the device and the process
connection gaskets in relation to the measuring medium.
• Avoid pulsating flow of the measuring medium. Use the
optional float damping if necessary.
• For gaseous measuring media we recommend an
undisturbed inlet length of five times the inside diameter of
the piping in accordance with VDI / VDE Directive 3513 sheet
3. Additional measures such as flow straighteners or
perforated plates may be necessary for highly unbalanced
flow profiles.
• Avoid contamination of gaseous measuring media (refer to
BGR 132-7.3.2.2.2).
• For liquid measuring media, the nominal diameter of the
piping should be dimensioned as large as possible (if
economically viable).
• Avoid gas inclusions in liquid measuring media.
• Use valves which open slowly.
• If the flowmeter is installed in a pipeline where
decommissioning is impossible or inexpedient, a bypass line
should be provided.
• Stop and throttle valves should preferably be attached to the
outlet of the flowmeter.
Figure 13: Installation of the flowmeter (example)
Refer to VDI/VDE Directive 3513 sheet 3, Selection and
Installation Recommendations for Variable Area Flowmeters.
Sensor insulation
Figure 14: Insulation of the flowmeter
As shown in Figure 14, the flowmeter may only be insulated up to
the flange diameter.
