Centrifugal Fans direct driven with scroll - Nicotra Gebhardt
Centrifugal Fans direct driven with scroll - Nicotra Gebhardt Centrifugal Fans direct driven with scroll - Nicotra Gebhardt
Fittings / Accessories Volumeter p in p in 2 qV = K × — × pDü Direct driven centrifugal fans / RZA / Accessories With the flow measuring device it is possible to easilymeasure / monitor the flow rate after the fan is installed. A pressure tapping at a predetermined position on the inlet cone is provided whereby the differential pressure in relation to the static pressure is measured in front ofthe inlet cone in a static atmosphere. • volume flow qV [m³/h] • calibration factor K [m²s/h] • density of media r [kg/m³] • pressure difference at cone DpDü [Pa] In order to calculate the flow rate, a calibrating factor "K" is required. This factor is determined by comparativemeasurement on a standard test rig. • • • Measuring connector in inlet cone Hose pipe to connecting piece in the side wall Connecting piece (external diameter of 6mm) for the pressure measurement Standard-calibration faktor K10
Fittings / Accessories Volume flow determination Electrical accessories 194 Direct driven centrifugal fans / RZA / Accessories With the represented chart and a measured difference pressure at the nozzle can streamed determined become the volumes in the indicated density. The chart can be used also to the determination of the needed pressure area of a manometer. In addition the difference pressure is determined at the nozzle for the maximally appearing volume current with the chart. m³/h q V 32000 28000 24000 20000 16000 12000 8000 4000 0 0 500 1000 1500 2000 p FI Pa RZA 11- 0560 0500 0450 0400 0355 0315 0280 0250 0225 Electrical accessories (Frequency converter, Differential pressure sensor, Universal control device, Isolator) see chapter "Accessories".
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Fittings / Accessories<br />
Volume flow determination<br />
Electrical accessories<br />
194<br />
Direct <strong>driven</strong> centrifugal fans / RZA / Accessories<br />
With the represented chart and a measured difference pressure at the nozzle can<br />
streamed determined become the volumes in the indicated density. The chart can be<br />
used also to the determination of the needed pressure area of a manometer. In addition<br />
the difference pressure is determined at the nozzle for the maximally appearing<br />
volume current <strong>with</strong> the chart.<br />
m³/h<br />
q V<br />
32000<br />
28000<br />
24000<br />
20000<br />
16000<br />
12000<br />
8000<br />
4000<br />
0<br />
0 500 1000 1500 2000<br />
p FI<br />
Pa<br />
RZA 11-<br />
0560<br />
0500<br />
0450<br />
0400<br />
0355<br />
0315<br />
0280<br />
0250<br />
0225<br />
Electrical accessories (Frequency converter, Differential pressure sensor, Universal<br />
control device, Isolator) see chapter "Accessories".
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