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Vortex Precession Flow Meter

  • Size:DN20-DN200
  • Accuracy:1.5% standard,1% optional
  • Medium Temperature:-20~80℃
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Summary

Intelligent swirl flow meter is the brand-new gas flow meter design & developed by our company with most advanced technology, this flow meter combine the functions of gathering flow,temperature and pressure testing, and could carry out the temperature, pressure and compression factor compensation automatically, which is the ideal instruments for gases measuring in petrol, chemical, power, metallurgy industry etc.


Main Performance

  Without movable mechanical parts inside, incorruptible,reliable&stable, long service life, long time runing no need special maintenance.

   Adopt 16bits computer chip, high integrity, small size, good performance, powerful functions.

♦   Adopt the advanced intelligent anti-vibration technology, restrain the interference signal caused by vibration and pressure fluctuate.

  Adopt EEPROM technology, convenient parameter setting, can save permanently, it can save the one year historal data.

  The flow converter could output frequency pulse, 4~20mA analogue signal, and has RS485 interference, it could connect computer network, the transmission distance can reach 1.2km.

  Multi physical quantity parameters alarm output, the end user can select any of them.

  Flow meter converter could rotate 360degree, easy and convenient installation.

  Match with our company FM model data gather, it could carry out the remote data transmission via internet or telephone or internet.

  Pressure, temperature signal is flow sensor input method, strong interchangeability. 

  Lower power consumption, could use the battery powered and connect the external power   


Working Principle

The flow sensor flow profile like the venturi tube shaped wire (pic 2), install one group sprial guide buffle in the side of entrance, while the fluid enter the flow sensor, the guide buffle will press the fluid generate strong swirl flow, when the fluid enter expansion section, the swirl flow will generate second time rotating under the effect of counterflow, and shape the swirl precession phenomenon of gyroscopic shape. The precession frequency in proportion to flow volume, it will not influenced by fluid physical property and density, when get the fluid second time precession, the testing element will get better linearity in the wide flow range. The signal will be magnified via front amplifer, filting and transform into the pulse signal in proportion to flow rate, then send to the micro processor undertake totalizering process with the temperature, pressure testing signal, fianlly it will display the measured result on the LCD displayer ( instantaneous flow total flow and temperature, pressure data).



 


 

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Vortex Precession Flow Meter Specification

Size

DN25-DN200

Accuracy

±1.0% of rate,±1.5% of rate

Standard State Condition

P=101.325KPa, T=293.15K.

Body Material

SS304, Aluminium Alloy

Pressure Rating

1.6 MPa,2.5 MPa,4.0 MPa,6.3 MPa

Environment Temperature

-30℃~+65

Relative Humidity

5%95%

Medium Temperature

-20℃~+80

Atmospheric Pressure

86KPa106KPa

External Power

24VDC±15%, ripple wave5

Internal Power

1 group 3.6V lithium battery (ER26500)

Power Consumption

External power: <2W, Internal power:  1mW

Signal Output

Pulse,4~20 mA

Communication

RS485

Explosion-Proof Mark

ExdIIBT4;ExiaIICT4

Protection Class

IP65

Cable Entry

M20×1.5, 1/2" NPT

 

  Precession Vortex Flow Meter Selection Table

QTLUX Selection Model: DN50-A1-C1-P1-S1-J1-D1-G1-B1-M1-F1

Accuracy

1

A1

 

 

 

 

 

 

 

 

 

1.5

A2

Connection

Flange

C1

Thread

C2

Wafer

C3

Pressure
Rating

1.6 MPa

P1

2.5 MPa

P2

4.0 MPa

P3

6.3 MPa

P4

Signal
Output

4~20 mA,pulse (two wire system)

S1

4~20 mA,pulse (three wire system)

S2

RS485 Commnunication

S4

4~20 mA,Pulse,Hart

S5

Alarm

Low and high limit alarm

J1

Without

J2

Cable
Entry

M20x1.5

D1

1/2" NPT

D2

Power
Supply

24VDC

G1

3.6V lithium Battery

G2

3.6V lithium Battery,24VDC

G3

Ex-proof

ExdIIBT4

B1

ExiaIICT4

B2

Without

B3

Body
Material

SS304

M1

Aluminium Alloy

M2

Flange
Standard

EN 1092-1, PN10

F1

EN 1092-1, PN16

F2

EN 1092-1, PN25

F3

EN 1092-1, PN40

F4

JIS B 2220, 10K

F5

JIS B 2220, 20K

F6

JIS B 2220, 40K

F7

ASME B16.5, Class 150

F8

ASME B16.5, Class 300

F9

ASME B16.5, Class 600

F10

 

  Flow Range Table

DN
(mm)

Type

Flow Range
(m3/h)

Flow Range  
(Nm3/h)

 Wroking Pressure
(MPa)

Accuracy Level

Repeatability

20

 

1.215

1.9824.73

1.6
2.5
4.0
6.3

1.0
1.5

Less than 1/3 of basic
error absolute value

25

 

2.530

4.1249.46

32

 

4.560

7.4298.93

50

B

10150

16.49247.32

80

B

28400

46.17659.52

100

B

50800

82.441319.04

150

B

1502250

247.323709.8

200

 

3603600

593.575935.68

1.6
2.5
4.0


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