First, precession vortex flowmeter requirements for measured air conditions

1. The gas to be measured shall be a single-phase, continuous tube flow through the pipe.

2. Before the gas flows through the flowmeter, the flow rate must be parallel to the axis of the pipeline and no vortex flow is allowed.

3 , the air flow should be subsonic, non-pulsating, and its flow rate changes slowly with time.

Second, the installation requirements for the spiral vortex flowmeter

The precession vortex flowmeter does not have much special requirements for the process installation and use environment, but any type of flow measurement instrument has a commonality that avoids vibration and high temperature environments as much as possible with the off-flow interference components ( such as the compressor , separators, pressure regulators, size heads and manifolds, elbows, etc. ) Keep the straight and straight inner walls of the meter straight and flat to ensure that the measured medium is a clean single-phase fluid.

Three, precession swirl flowmeter installation and use should pay attention to matters

Precession vortex flowmeter has no mechanical moving parts, small size, corrosion resistance, stable performance ; can directly display the working pressure, temperature, flow rate of the medium and the gas volume under the standard state ; wide range of measurement range, small measurement error, etc. It is widely used in the production and measurement of oil and gas wells and in the measurement of natural gas sales. In field applications over the years, we believe that the flowmeter is best suited for relatively clean dry gas metering and gradually becomes the preferred meter for small and medium gas metering.

To ensure that the precession vortex flowmeter measures accurately and reduces the measurement error, please note:

1. The rational selection should not make the actual minimum flow QVmin lower than the lower limit of the selected flowmeter flow range.

2. The correct flow meter upstream of the installation should have at least 10 D of measurement straight pipe length. The inner wall of the straight pipe section should be smooth, and no step can be made. The weld seam of the connecting flange is smoothed and the flange gasket cannot protrude into the pipe. Can't install the direction of the flowmeter again. Tests have proved that all unreasonable installations will lead to a low metering value.

3 , away from the source of shock, or install the pier on the flow meter, downstream to avoid the impact of pipeline vibration. Avoid strong magnetic field interference on the flow meter chip.

4 , the relatively clean temperament, especially the liquid-gas two-phase flow ; when the temperament is dirty, the flowmeter should be cleaned immediately.

5 , to reduce the impact of air flow pulsation can be installed in front of the buffer tank, or lengthen the length of the metering straight pipe upstream.

6 , timely verification of the swirling vortex flowmeter to ensure accurate and reliable value.

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