DEVICE DESCRIPTION
2
17
H250 M40
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03/2020 - 4000640706 - MA H250-M40 R06 en
2.2.2 Float damping
Float damping is characterised by high standstill times and self-centering. The damping sleeve
is made of high performance ceramic or PEEK, depending on the medium and the application.
Float damping can also be retrofitted for the user (refer to "Service").
Use of damping
•
Generally when CIV and DIV floats are used for gas measurement.
•
For TIV floats (H250/RR and H250/HC only) with an operating primary pressure:
2.2.3 Pointer damping
In principle, the indicating element with its magnetic system contains indicator damping.
An additional eddy current brake is advantageous in the event of fluctuating or pulsing flows.
The magnets on the eddy current brake surround the pointer vane without touching it, damping
its movement. The result is a much steadier pointer position, without distorting the measured
value. The eddy current brake can be retrofitted during operation without recalibration.
Note the maximum tightening torque (0.12 Nm) for the turnbuckle!
Nominal size according to
Operating primary pressure
EN 1092-1
ASME B16.5
[bar]
[psig]
DN50
1/2"
≤
0.3
≤
4.4
DN25
1"
≤
0.3
≤
4.4
DN50
2"
≤
0.2
≤
2.9
DN80
3"
≤
0.2
≤
2.9
DN100
4"
≤
0.2
≤
2.9
Table 2-1: Float damping
Figure 2-7: Pointer damping
1
Eddy current brake
2
Pointer vane
3
Support
4
Pointer cylinder
5
Turnbuckle, max. tightening torque is 0.12 Nm