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Magnetic Vortex Flow Meter/Vortex Flow Meter

Basic Info

Model No.:  cx

Product Description

Model NO.: cx Main Application: Water, Wastewater, Diesel Fuel, Fuel Oil, Nature Gas, Corrosive Liquid/Gas Sensor: Tube/Flange Measurement Object: Closed Pipeline (Mainland) Brand Name: Gn Exported: More 80 Countries Maintenance: Less and Easy Specification: CE SGS HS Code: 9026100000 Accuracy: >±1% Size: DN50-100 Application: Environmental Protection Certification: CE, SGS, ISO Warranty: One Year Price: Competitive Trademark: GN Origin: Shanghai Working principle
To install a vortex generator(bluff body)in the fluid,which can produces regular vortex at both sides of the vortex generator altematively.Such vortex is called Karman Vortex.Vortex trains are asymmetrically arranged at the downstream of the vortex geberator. Suppose the generating frequency of the vortex is f,the average speed of the incoming flow of the tested medium is V,the head-on width of the vortex generator is d,and the diameter of the flowmeter is D,and base on the principles of Karman Vortex,the following relations will be obtained:  
    cart(1)
                   f=StV/d           Formula (1)     
 
 
Note:f- Suppose the generating frequency of the vortex
     St-Strouhal number
     V-average flow velocity at both sides of the vortex generator
d- the vortex geberator body width
 
Thus, by measuring the Carmen frequency of vortex separation of instantaneous flow rate can be calculated. Among them, Strouhal number ( St ) is a dimensionless unknown, Figure ( two) said the Strouhal number ( St ) and Reynolds number ( Re ) relationship.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

                                    chart(2)
In the curve St = 0.17straight section, whirlpool release frequency and velocity proportional to, namely the vortex flow sensor measurement range. As long as the detected frequency f can be obtained within the tube by the flow rate of the fluid, flow velocity and volume flow rate V. The measured pulse number and volume ratio, called the instrument constant ( K ), see type (2)
                      K=N/Q(1/m³)             Formula (2)
K=Instrument constant(1/m³)
N=Pulse number
Q=Volume flow(m³)
 
 
Main technical index                                 Unit(1)
Nominal diameter(mm) 25,40,50,65,80,100,125,150,200,250,300,(300~1000 Insert type)
Nominal pressure (MPa) DN25-DN200 4.0(>4.0 Supply agreement),DN250-DN300 1.6(>1.6 Supply agreement)
Medium temperature(ºC) Piezoelectric type:-40~260,-40~320;Capacitance type
: -40~300, -40~400,-40~450(Supply agreement)
Body material 1Cr18Ni9Ti,(Other materials supply agreement)
Allowable vibration acceleration Piezoelectric type:0.2g     Capacitance type:1.0~2.0g
Accuracy ±1%R,±1.5%R,±1FS;Insert type:±2.5%R,±2.5%FS
Range of 1:6~1:30
Power supply voltage Sensor:+12V DC,+24V DC;Transmitter:+12V DC ,+24V DC;Battery type:3.6V Battery
Output signal Square wave pulse ( not including the battery power supply type ): high level or low level5V,1V; current: 4~ 20mA
Pressure loss coefficient In line with the JB / T9249standard Cd = 2.4
Explosion proof marks Intrinsic safety type: Exd IA CT2-T5 flameproof type: Exd CT2-T5
Protection grade The ordinary IP65  diving type IP68
Environmental conditions Temperature - 20~ 55,5% ~ 90% of relative humidity, atmospheric pressure is 86 ~ 106kPa
Applicable medium Gas, liquid, steam
Transmission distance Three wire system pulse output type: < 300m, two line standard current output type (4 ~ 20mA ): load resistance less than 750ohm
 
 
 
 
 
 
 
 
 
 
Table (2) reference conditions of vortex flow sensors flow rate range table
Meter diameter
(mm)
Liquid Gas
Measuring range
(m3/h)
Output frequency range(Hz) Measuring range
(m3/h)
Output frequency range(Hz)
25 1.2~16 25~336
 
8.8~55 190~1140
40 2~40 10~200 27~205 140~1040
50 3~60 8~160 35~380 94~1020
80 6.5~130 4.1~82 86~1100 55~690
100 15~220 4.7~69 133~1700 42~536
150 30~450 2.8~43 347~4000 33~380
200 45~800 2~31 560~8000 22~315
250 65~1250 1.5~25 890~11000 18~221
300 95~2000 1.2~24 1360~18000 16~213
(300) 100~1500 5.5~87
 
1560~15600 85~880
(400) 180~3000 5.6~87 2750~27000 85~880
(500) 300~4500 5.6~88 4300~43000 85~880
(600) 450~6500 5.7~89 6100~61000 85~880
(800) 750~10000 5.7~88 11000~110000 85~880
(1000) 1200~1700 5.8~88 17000~170000 85~880
>(1000) Agreement
Agreement
Note: (300) to (1000) diameter for insertion type

4

  
 


chart(3)

Instrument installation dimensions: see figure ( five ), map ( six)
 
Caliber
()(mm)
(mm)
A B C CH
15~25 70 55 390 455
40 85
 
80 385 440
50 85 90 390 450
65 85 105 400 470
80 90 120 420 480
100 85 140 440 500
125 95 168 465 530
150 100 194 490 560
200 102 248 545 610
250 115 300 600 660
300 130 350 650 710


 









B




 
Caliber (mm) DN250 DN300 DN400 DN500 DN600 DN800-
2000
L 60.5 58 65.5 60.5 55.5 45.5


L

                                                            
 
 














Sensor



Direction indicator








Globe valve




Flange



Measuring head




chart(4)
 

 
 




 

                                    chart(5)
 
 
 
 
 
 
 
 
Vortex Flow Meter selection table
Spectrum Explain
LU
Vortex flow meter
G
Sensor
Detection mode B
Piezoelectric sensor
E
Capacitance type sensor
Connection mode
1 Only the full pipe type Flange connection
2 Only the full pipe type The flange clamp type
3 Only to insert type Simple insertion type
4 Only to insert type Insertion type ball valve
Measurement of medium
2

Liquid
3

Gas
4

Steam
Nominal diameter
02

30
 
 
 
DN25
              unit:mm
DN300
The use of the environment
P
Ordinary type
B
Explosion proof type
Output signal
1
Pulse output
2
4 ~ 20mA output current, liquid crystal display
3
RS-485 communication
4
Battery powered, with temperature, pressure compensation
5
The temperature and pressure compensation for one,4 ~ 20mA current output type
6
The temperature and pressure compensation integrated, battery power supply type
Type description For example: LUGE2405-P2 full pipe type capacitive vortex flow meter, a flange clamp connection, medium for steam
Instrument path for DN50, general 4~ 20mA output current signal












 
2. Sensor the nominal size of the code table
 
Nominal diameter  DN  mm 25 32 40 50 65 80 100 125 150 200 250
Tag number 02 03 04 05 06 08 10 12 15 20 25
Nominal diameter  DN mm 300 350 400 450 500 600 700 800 1000 1200 1500
Tag number 30 35 40 45 50 60 70 80 A0 A2 A5
 
 

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