Measuring flow ranges of superheated steam flowmeters

Vortex flowmeter is suitable for flow measurement and detection of saturated steam, superheated steam, gas, liquid and other media. When selecting a suitable superheated steam flow meter, in addition to parameters such as temperature and pressure, you must also pay attention to the medium flow range.

1. The common flow rate should be controlled in the middle and upper part of the measurable range of the vortex street

Since the measurement of the lower limit flow rate of the vortex street is easily affected by pipeline vibration, the lower limit should be avoided as much as possible measurement.

2. When the flow range exceeds the measurable range of the vortex flowmeter, the diameter can be reduced or expanded. However, it should be noted that the diameter of the instrument should not be too large. After the diameter is reduced, the flow rate increases and the increase If the resistance and back pressure are reduced, cavitation is prone to occur when the diameter is expanded; when the straight pipe section allows, "reducing head + straight pipe section" should be selected to ensure stable measurement of the fluid; the Reynolds number should also be considered when selecting the flow range Is it within the normal range?

3. Vortex flowmeter is not suitable for measuring pulsating flow. If there are power mechanical equipment such as Roots blowers and reciprocating water pumps in the pipeline system, strong pulsation will occur. If the pulsation frequency is within the vortex frequency band, measurement errors will occur. When the pulsation is severe, a Karman vortex cannot even be formed. .

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