Manual
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danger
Risk of injury due to high fluid temperatures.
• Use safety gloves to handle the fitting.
• Stop the circulation of fluid and drain the pipe before
loosening the process connections.
Risk of injury due to the nature of the fluid.
• Respect the prevailing regulations on accident pre-
vention and safety relating to the use of hazardous
products.
Warning
Risk of injury due to non-conforming installation.
• Fluidic installation can only be carried out by qualified
and authorised personnel with the appropriate tools.
• Observe the installation instructions for the measuring
device inserted into the fitting.
Risk of injury due to an uncontrolled restart.
• Ensure that the restart of the installation is controlled
after any interventions on it.
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Warning
Risk of injury if the fluid pressure/ temperature
dependency is not respected.
• Take into account the fluid pressure/ temperature
dependency according to the materials from which the
fitting is made and to the measuring device used (see
the relevant user manual).
• Comply with the Pressure Directive 97/23/EC.
→ Select an appropriate fitting regarding to the flow
velocity and the flow rate of the fluid in the piping, see
the following charts:
The graph is used to determine the DN of the pipe and the
fitting appropriate to the application, according to the fluid
velocity and the flow rate.
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Selection example:
- Specification: if the nominal flow is 10 m
3
/h the dimen-
sioning of the optimal flow rate must be contained in 2 to
3m/s
- Answer: on the chart, the intersection of flow rate and
flow velocity gives the appropriate diameter, DN40 or
DN50 for fittings with *.
* For fittings:
- with external threads according to SMS 1145,
- with weld-ends according to SMS 3008, BS 4825 /
ASME BPE or DIN 11850 Rg2
- Clamp according to SMS 3017 / ISO 2852 or BS 4825 /
ASME BPE or DIN 32676
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0.1 0.3 0.5 1 3
5
10
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
20
50
100
200
m
3
/h
0.2
0.5
1
2
5
10
20
50
100
200
500
1000
2000
3000
l/min
0.3 0.5 1 3 5 10
30
m/s
fps
gpm
0.05
0.1
0.2
0.5
1
2
5
10
20
50
100
200
500
1000
DN65
DN50 (DN65)*
DN40 (DN50)*
DN32 (DN40)*
DN25 (DN32)*
DN20 (DN25)*
DN15 (DN15 or
DN20)*
DN08
DN06
flow rate
Fluid velocity
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