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Vortex Flow Sensor
Product Model:Vortex Flow Sensor

1.Working Principle:
The vortex flowmeter operates on the basis of Karman vortex street principle. If put a vertical cylinder in flow fluid,during the range of Reynolds number will alternate to form a regular vertex behind the cylinder two sides,named as Karman vortex street.The direction of vortex street is inward,up will form a clockwise rotation,down will form a counter-clockwise rotation,the frequency in single side in proportion to flowrate, in inverse proportion to the diameter of vortex producer,the relationship of them as following:
f=St×v/d
In the formula:St-Jack straw Hal number;f-frequency product by single side vortex;v-flowrate;d-diameter.
Instrument parameters K: a ratio of separation pulse amount of vortex to the volume amount:
K=N/V
In the formula:
K-instrument coefficient (pulse 1/m3)
N-pulse number (time)
V-volume amount
The relationship between the vortex separation frequency and liquid flow is as follows:
f=K×Q
In the formula:
f-frequency (time)
Q-flow (m3/h)
By testing the vortex separation frequency, the liquid flow in the pipe can be measured.

2.Type Selection:


Model

Instruction

1

2

3

4

5

6

7

8

9

10

 

 

 

 

 

 

 

 

Karman Vortex Street

LUG

 

 

 

 

 

 

 

Stress Type Testing

Measuring Ways

1

 

 

 

 

 

Flange connection(GB9119-2000)

2

 

 

 

 

 

Clamp flange(equip with flange and bolts in factory)

Medium

1

 

 

 

 

Both for gas and liquid

2

 

 

 

 

Liquid

3

 

 

 

 

Gas

4

 

 

 

 

Steam

Diameter

02

 

 

 

DN25

04

 

 

 

DN40

05

 

 

 

DN50

08

 

 

 

DN80

10

 

 

 

DN100

15

 

 

 

DN150

20

 

 

 

DN200

25

 

 

 

DN250

30

 

 

 

DN300

Operation Condition

Blank

 

 

Normal Type

B

 

 

Intrinsic safety,iaIICT6

Signal Output

P

 

Voltage pulse, 24V power

Hand operator and digital control meter is optional

S

 

Pulse,4~20mA, on-site,24V power

Optional Input ports:HART,temp.(PT100),pressure sensor,pressure transmitter

D

 

On-site,without any display,lithium battery

Without any input ports

Structure

F

Separated Type

Z

Integrated Type



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