INSTALLATION
3
23
H250 M40
www.krohne.com
03/2020 - 4000640706 - MA H250-M40 R06 en
3.4.1 Tightening torques
For devices with PTFE liner or ceramic liner and PTFE raised face, tighten the flange threads
with the following torques:
3.4.2 Magnetic filters
The use of magnetic filters is recommended when the medium contains particles which can be
influenced magnetically. The magnetic filter is to be installed in the flow direction upstream of
the flowmeter. Bar magnets are positioned helically in the filter to provide optimal efficiency at
low pressure loss. All of the magnets are coated individually with PTFE to protect against
corrosion. Material: 1.4404 / 316L
Nominal size according to
Stud bolts
Max. torque
EN 1092-1
ASME B16.5
EN
ASME
EN 1092-1
ASME 150 lb
DN
PN
Inch
lb
150 lb
300 lb
Nm
ft*lbf
Nm
ft*lbf
15
40
1/2"
150/300
4x M12
4x 1/2"
4x 1/2"
9.8
7.1
5.2
3.8
25
40
1"
150/300
4x M12
4x 1/2"
4x 5/8"
21
15
10
7.2
50
40
2"
150/300
4x M16
4x 5/8"
8x 5/8"
57
41
41
30
80
16
3"
150/300
8x M16
4x 5/8"
8x 3/4"
47
34
70
51
100
16
4"
150/300
8x M16
8x 5/8"
8x 3/4"
67
48
50
36
Table 3-1: Tightening torques
Figure 3-3: Types of magnetic filters
1
Type F - fitting part with flange - overall length 100 mm / 4"
2
Type FS - fitting part without flange - overall length 50 mm / 2"
