Vortex flow meter
- Commodity name： Vortex flow meter
- Product Description
-
Overview
Vortex flowmeters are widely used in industrial pipelines in sectors such as petroleum, chemical, electric power, and light industry to measure the flow of liquids or gases.
They can also be used for flow measurement in urban water supply, heating, boiler water supply, and fluid pipelines in the medical industry.
For flow measurement in large and medium-sized pipelines, an insertion structure can be used. If a ball valve and lifting mechanism are installed, continuous flow disassembly can be performed, facilitating the cleaning and maintenance of the sensor.
Working Principle
The vortex flowmeter uses the principle of Kármán vortex street to measure the flow of steam, gas, and low-viscosity liquids.
When the fluid flows past a vortex generator placed perpendicular to the flow direction of the measured medium, two rows of vortices are alternately generated on both sides behind it, known as Kármán vortex street. Within a certain range of Reynolds numbers (2×104～7×106), the frequency f of the vortices generated has the following relationship with the average velocity V of the medium and the width d of the upstream face of the vortex generator:
, where St is the Strouhal number, which is a dimensionless constant. By detecting the frequency f of the vortices using a piezoelectric element, the average flow velocity V can be calculated, thus determining the flow rate of the medium in the pipeline.Product Features
(1) Simple structure with no moving parts, easy installation and maintenance, long lifespan.
(2) Low pressure loss with a wide range of measurement.
(3) The piezoelectric stress detection element is independently installed behind the vortex generator, reducing the impact of dirt in the medium.
(4) The detection element does not come into direct contact with the measured medium, making it especially suitable for flow measurement in harsh environments.
(5) Can display on-site, transmit remotely, and connect to computer control systems.
Technical Specifications
Nominal Diameter Pipeline Type: DN15～DN500
Insertion Type: DN200～DN2000Medium Gas, liquid, steam Nominal Pressure PN16, PN25, CL150, CL300 Accuracy Level Liquid: Class 1 Gas: Class 1.0, Class 1.5 Medium Temperature -20℃～+250℃; 100℃～+350℃ Output Signal Type Pulse signal On-site display with standard current output of 4～20mA Battery powered for on-site direct reading Battery powered on-site direct reading with temperature and pressure compensation On-site direct reading with temperature and pressure compensation and output of 4～20mA On-site LCD display with output of 4～20mA + HART On-site direct reading with RS485 communication On-site direct reading with RS485 communication and temperature and pressure compensation Power Supply 24V DC power supply 1. Two South Battery cells
2. 3.6V, 7.5Ah lithium battery, designed battery life is two yearsExplosion-proof Marking Ex iaⅡCT1～T5Ga Materials SUS304, SUS316
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