Introduction
principle, structure
The vortex flowmeter is measured by the principle of Karman vortex street. A column is inserted vertically into the measuring tube. When the fluid passes through the column, under certain conditions, two columns of regular vortices will be alternately generated on both sides of the column, as follows As shown in the figure, these two rows of vortices are called "Kaman vortex streets". When d/D=0.281, the released vortices are the most stable. It can be simply expressed by the following formula:
F=St ×V/d
F: is the release frequency of the Karman vortex street
St: is the coefficient (called the Strohha number)
V: is the flow rate
d: column width
D: the inner diameter of the instrument
main feature
● Integrated liquid, gas or vapor mass flow meter
● Fully digital vortex street using DSP spectrum analysis technology and adaptive filtering technology
● Measurement vibration sensor independent of signal measurement sensor, excellent anti-vibration performance
● Excellent low flow rate performance; ultra-wide turndown ratio 17:1
● Probe design with built-in temperature
● Online replaceable testing pressure measurement design
● With 10-point nonlinear correction function
● Optional HART communication protocol or RS485 communication (MODBUS protocol)
● Modular circuit design and rich self-diagnosis function, easy maintenance
● Fast response speed, suitable for process control and automatic adjustment
● High temperature sensor can measure steam up to 400℃
● Electrical isolation between output and power supply, with excellent anti-interference ability
● The power supply has AC and DC, which is convenient for users to choose
application
| fluid | condition | industry | |||||||
| gas | Clean | Metallurgy, papermaking, water treatment, chemical industry, light industry, textile, food and beverage, catering, agricultural irrigation, hydropower station, oil field, power and mining industries | |||||||
| dirty | |||||||||
| liquid | Clean | ||||||||
| Corrosive | |||||||||
| dirty | |||||||||
| steam | Saturated Vapor | ||||||||
| superheated steam | |||||||||
Performance overview
Flow meter, the base element is stainless steel or alloy. Applicable medium: liquid, gas, steam. The maximum working pressure is 40Mpa. The medium temperature is -50…360℃. Power supply: 12V~36VDC. Protection level IP68. Applicable pipe diameter 15-600mm. Unique DSP spectrum analysis technology.