Performance comparison between vortex flowmeter and throttling differential pressure flowmeter

Performance comparison between vortex flowmeter and throttling differential pressure flowmeter Advantages of vortex flowmeter Compared with throttling differential pressure flowmeter, vortex flowmeter has the following advantages. ①Simple and firm structure, easy installation and maintenance. There is no need for pressure guide tubes and three-valve groups, etc., reducing leakage, blockage and freezing. ②The accuracy is high, generally ±^〜^ 5) ^ 8. ③The measurement range is wide, the caliber can be reasonably determined, and the range can reach 20:1. ④The pressure loss is small, about 1/4-1/2 of the throttling differential pressure flowmeter. ⑤ Output a pulse signal proportional to the flow rate without zero drift. ^⑥In a certain range of Reynolds number, the output frequency is not affected by the physical properties (density, viscosity) and composition of the fluid, that is, the instrument coefficient is only related to the shape and size of the vortex generator and the pipe. Limitations of the vortex flowmeter ① It is sensitive to the mechanical vibration of the pipeline and should not be used in strong vibration places. ②The larger the caliber, the lower the resolution. Generally, the full tube flowmeter is used below 0^400. ③When the fluid temperature is too high, the sensor still has difficulty, and the general fluid temperature is < 4201. ④ When the fluid has pressure pulsation or flow pulsation, the indication value will be greatly higher and the influence will be greater, so it is not suitable for pulsating flow.

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