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3.2.1 Flowmeter Primary Installation
The electromagnetic flowmeter can be installed at any arbitrary
location in the pipeline as long as the installation requirements
(see 3.2) are satisfied.
When selecting the installation site consideration should be
given to assure that moisture cannot enter into the electrical
connection or converter areas. Make certain to carefully seat
the gaskets and secure the covers after installation and start-up
have been completed.
Note:
Graphite should not be used for the flange or process
connection gaskets, because under certain conditions it
may cause an electrically conductive coating to form on
the inside of the metering spool. Vacuum shocks in the
pipeline should be avoided to prevent damage to the
liners.
Gasket Surfaces on the Mating Flanges
In all installations parallel mating flange surfaces should be
provided and gaskets made from materials suitable for the fluid
and the temperature should be installed. Only then can leaks be
avoided. The flange gaskets for the flowmeter primary must be
installed concentrically to achieve optimum measurement re-
sults.
Protection Plates
Protection plates are installed to prevent damage to the
flowmeter primary liner during transport. Remove the protection
plates only when ready to install the flowmeter in the pipe line.
Be careful not to cut or otherwise damage the liner in order to
prevent leakage.
Electromagnetic Flowmeter COPA-XT
Torque Specifications for Flanges
The mounting bolts are to be tightened equally in the usual
manner without excessive one-sided tightening. We recom-
mend that the bolts be greased prior to tightening and that they
be tightened in a criss-cross pattern as shown in Fig. 9. Tighten
the bolts during the first pass to approx. 50%, during the second
pass to approx. 80% and only during the third pass to 100% of
the max. torque value. The max. torque values should not be
exceeded, see the following table:
Fig. 9
Torque Specifications for Flanged Flowmeters
Liner
Meter Size
DN mm inches
PFA/PTFE/
10
Hard rubber
15
≥1/2" DN15
20
25
32
40
50
65
80
100
Table 1
Torque Specifications for Wafer Design Flowmeters
Liner
Meter Size
DN mm inches
10
15
20
25
PFA/
32
PTFE
40
50
65
80
100
Table 2
Note:
For measurement reasons it is recommended that the
mating flanges be made of plastic or stainless steel
when installing a Wafer Design flowmeter.
Process
Bolts
Torque
Connec-
max.
tions
Nm
3/8
Flanges
4 x M12
1/2
4 x M12
3/4
4 x M12
1
4 x M12
1-1/4
4 x M16
1-1/2
4 x M16
2
4 x M16
2-1/2
8 x M16
3
8 x M16
4
8 x M16
Process
Bolts
Torque
Connec-
max.
tions
Nm
3/8
Wafer
4 x M12
1/2
Design
4 x M12
3/4
4 x M12
1
4 x M12
1-1/4
4 x M16
1-1/2
4 x M16
2
4 x M16
2-1/2
8 x M16
3
8 x M16
4
8 x M20
Press.
Rating
bar
8
40
10
40
16
40
21
40
34
40
43
40
56
40
39
40
49
40
47
16
Press.
Rating
bar
7
40
7
40
11
40
15
40
26
40
33
40
46
40
30
40
40
40
67
40
5
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