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INSTRUCTION MANUAL 10DX3111A&G Sizes 14 - 24 Inches
2.4 Mounting
2.4.1 Orientation
The ABB Automation Series 3000 Magnetic Flowmeter may be installed in horizontal, vertical or
sloping pipe runs. However, precautions must be taken to assure that the metering tube is filled at all
times during measurement. A vertical installation, with the pipe line carrying fluid upwards assures a
filled hydraulic line under low flow rate conditions and also minimizes wear on the meter lining by
abrasive grit. Horizontal installations should be made with the meter in the lower section of a pipeline
to assure a filled meter condition.
For horizontal or sloping installations the meter should be placed so that the electronic housing of the
meter is on top. This will align the meter electrodes in a lateral plane. Positioning the meter in this
way eliminates the possibility of entrained air acting as an electrode insulator. (Electrodes must not
be on "top" when the meter is horizontally mounted.)
The MAG-X Magnetic Flowmeter must be oriented in accordance with the direction of process flow,
as indicated by the FLOW arrow on the meter data tag. For accurate metering, a straight pipe run
equivalent to a minimum of three straight pipe diameters are required upstream of the meter,
measured from the center of the meter. See Figure 2-3 for recommended piping diagrams (Note that
the illustration is for references purposes only and that the meter shown may not represent
the actual model described in this instruction manual).
If a throttling valve is required, it is strongly recommended that it be placed downstream of the meter.
Upstream valves can create turbulence that result in undesirable air pockets and may affect the
meter's accuracy or cause its output to be noisy. If greasy sludges or insulating materials which tend
to coat pipe walls are to be metered, it is recommended that in addition to standard block valves and
bypass line, a clean-out tee be installed to facilitate meter cleaning without removal or interruption of
the process.
2.4.2 Pipe Connections
Standard meter piping connections are made by means of flanges that conform to ANSI standards in
outside diameter and bolt circle. The bearing surfaces of the flanges are insulated with the meter pipe
liner. Figure 2-2 provides outline and mounting dimensions of the standard Series 3000 large
diameter Magnetic Flowmeters. Outline and mounting dimensions for the remote mounted Signal
Converter are shown in the Instruction Manual supplied with the Signal Converter.
It is generally recommended that two pipe spools be installed while the flowmeter is out of the
pipeline, one on each end fitting of the meter, in order to minimize the possibility of damage to the
meter pipe and flange liner during mounting. Lined spool pieces and/or special length spools are
available on special order. (Exception - see NOTE below. TEFLON
Lined Meters).
2-5
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