<3. Installation>
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IM 01E25A01-01EN
3.2.2 Flowmeter Piping
CAUTION
Misaligned or slanted piping can lead to leakage and
damage to the flanges.
(1) Correct any misaligned or slanted piping, and any
gaps that may exist between mounting flanges before
installing the flowmeter (see Figure 3.2.2).
Slanted
F0310.ai
Misaligned
Figure 3.2.2 Slanted and Misaligned Flowmeter Piping
(2) Inside a newly installed pipeline, there may be some
foreign substances such as residue from welding
or wood chips. Remove them by flushing the piping
before mounting the flowmeter. This prevents the
lining from being damaged, as well as the occurrence
of erroneous measured signals resulting from foreign
substances passing through the sensor during
measurement.
3.3 Integral Flowmeter and
Remote Sensor Installation
WARNING
• All gaskets used for piping of Magnetic Flowmeters
should be prepared by customers except in some
cases.
With the option of grounding ring, if the lining is
natural hard rubber or PTFE, gaskets must be
placed between each the grounding ring and the
sensor to avoid fluid leakage. These gaskets are
to be supplied by customer. Do not forget those
gaskets also when ordering and attaching the
grounding rings later additionally.
• Use the gasket of the equivalent hardness for
gasket (customer pipe) and gasket (sensor).
NOTE
• The tightening torque of gaskets varies by the
type and external dimensions of the lining and the
gasket. The tightening torque values should be
decided by referring to Table 3.3.1.
• For fluids capable of potentially permeating PTFE
linings (such as nitric acid, hydrofluoric acid, or
sodium hydrate at high temperatures), do not use
the PTFE lining type.
NOTE
• The PTFE lining has a structure adhering PTFE to
the metal inner face of the sensor. When tightening
bolts and nuts to install to the piping, be careful not
to bring unequal stress or torque to the PTFE lining.
• For the PTFE lining, it is recommendedo be installed
with grounding rings, or to be installed with short
pipes at upstream and downstream sides.
IMPORTANT
Use bolts and nuts in compliance with the flange
ratings. When choosing the gaskets, be sure to choose
sheet gaskets designed to fit for flange standard.
Installation
3
