KROHNE OPTIFLUX 2070 EN - Manual (Page 14)

3
INSTALLATION
14
OPTIFLUX 2070
www.krohne.com 04/2008 • 4000243601
3.5.10 Grounding
3.6 Installation
Here you find the maximum pressure and torques for the flowmeter. All values are theoretical
and calculated for optimum conditions and use with carbon steel flanges.
Figure 3-12: The grounding of the flowmeter
1 Metal pipelines, not internally coated. Grounding without grounding rings!
2 Metal pipelines with internal coating and non-conductive pipelines. Grounding with grounding rings!
3 Grounding rings
CAUTION!
The grounding of the flowmeter provides a stable and accurate measurement.
Nominal size
DN [mm]
Pressure
rating
Bolts Max. torque [Nm]
Polypropylene Hardrubber
50 PN 40 4 × M 16 55 31
65 PN 16 4 x M 16 51 42
80 PN 40 8 × M 16 47 25
100 PN 16 8 × M 16 39 30
125 PN 16 8 x M 16 53 40
150 PN 16 8 × M 20 68 47
200 PN 10 8 × M 20 - 68
250 PN 10 12 x M 20 - 65
300 PN 10 12 x M 20 - 76
350 PN 10 16 x M 20 - 75
400 PN 10 16 x M 24 - 104
450 PN 10 20 x M 24 - 93
500 PN 10 20 x M 24 - 107
600 PN 10 20 x M 27 - 138