KRAL OMG 13 - Load Due to Pressure Pulsation; Maximum Values

8 OIO 14en Edition 07/2017 Operating Instructions
Operational limits
Technical data
Technic al data
Operational limits
The values specified on the rating plate and the calibration certificate apply. The permissible operational
limits of individual values influence each other so that every application is checked individually by the
manufacturer when selecting the flowmeter.
If no operating data are provided by the orderer, standardized substitute operating data are used.
Load due to pressure pulsation
Maximum values
The following table shows the respective maximum values that, however, may not occur simultaneously.
In addition, the operational limits of the corresponding end connection, of the sealing material of the pick
up and of the temperature sensor are to be observed.
Tab. 1 Maximum values
Tab. 2 Additional maximum values when BEG 43D is used
Strong pressure pulses in the system can reduce the lifetime of
the flowmeter.
Fig. 1 Pressure pulses
OMG 13 OMG 20 OMG 32 OMG 52 OMG 68 OMG100 OMG140
Flow rate
Q
max
[l/min] 15 45 150 525 1050 3000 7500
Q
nom
10 30 100 350 700 2000 5000
Q
min
0.1 0.3 1 3.5 7 20 50
Pressure max. [bar] 250 160 100 40
Temperature
min.–max. [° C] -20...+200
Viscosity
min.–max. [mm
2
/s] 1 – 1000000
Measuring
chamber
volume
[ml/U] 1.64 6.25 25.6 112.7 251.3 833.3 2259.9
Rotation speed
n (Q
max
) [min
-1
] 9120 7200 5850 4658 4182 3600 3318
n (Q
nom
) 6090 4800 3900 3105 2784 2400 2214
n (Q
min
) 61 48 39 31 28 24 22
K1 OMG 13 OMG 20 OMG 32 OMG 52 OMG 68 OMG100 OMG140
Pole number 2 4 6 8 10 14 20
K-factor [P/l] 1216 640 234 71.0 39.8 16.8 8.85
Milliliters/pulse [ml/P] 0.822 1.56 4.27 14.08 25.13 59.52 112.99
Pulse frequency
f1 (Q
max
) [Hz] 304 480 585 621 697 840 1106
f1 (Q
nom
) 203 320 390 414 464 560 738
f1 (Q
min
) 2.0 3.2 3.9 4.1 4.6 5.6 7.4
10 3020 40 t [ms]
30
10
20
0
p
[bar]