Page 418 - Bürkert

Selection Help – Flow Velocity Considerations you find the correct fitting diameter for your application depending on
Depending on the sensor type, the right flow rate has to be chosen to get flow velocity and sensor technology. Pipes for fluids similar to water are
the best accuracy. The higher the flow velocity, the lower the measure- generally designed for an average flow velocity of approx. 2 to 3 m/s or
ment error, but the higher the pressure loss. The following chart will help 6-10 ft/s.

Flow rate Diagram for nominal diameter selection
3
[GPM] [l/min] [m /h] DN400
55000 4000 DN350
DN300 S020 Fittings
8000 2000 DN250
1000 DN200
10000 DN150
500
1.600 DN125
5000
DN100
800 200 DN80
100 DN65
1000 DN50 (DN65)*
50 DN40 (DN50)*
160 500
DN32 (DN40)*
80 20 DN25 (DN32)*
10 DN20 (DN25)*
100 DN15 (DN15 or DN20)*
5
16
50
DN10
8 2
20 DN8
1 DN6
10
0.5 *for following fittings:
1.6
5 – with external threads
0.8 3 0.2 acc. to SMS 1145
– with weld-ends
2 acc. to SMS 3008,
0.1 BS 4825 | ASME BPE
1 or DIN 11850 Series 2
0.05 – clamp acc. to
0.16
0.5 SMS 3017 / ISO 2852,
0.08 0.3 0.02 BS 4825 / ASME BPE
0.2 or DIN 32676
0.01
0.1 0.2 0.3 0.5 1 2 3 5 10 [m/s]
0.33 0.65 1 1.6 3.3 6.6 10 16.4 33 [ft/s] Flow velocity
8030 HT
8011 / 12 / 20 / 25 / 26 /30 / 32 / 35 / 36 /39
8041 / 8045
8051 / 55 / 56

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