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JC080 Vortex Steam Flow Meter

Parameters of JC080 Vortex Steam Flow Meter

JC-080 series smart vortex flowmeter is mainly used for measuring flow of industrial pipeline fluid, such as gas, liquid and steam, etc. It has little pressure loss, broad span range and high accuracy. It is not under influence of density, pressure, temperature and viscocity when measuring volumetric flow. It has no movable mechanical parts with high reliability and little maintenance.

JC080 Vortex Steam Flow Meter

Description

JC-080 series smart vortex flowmeter is mainly used for measuring the flow of industrial pipeline fluid, such as gas, liquid, and steam, etc. It has little pressure loss, broad span range, and high accuracy. It is not under influence of density, pressure, temperature, and viscosity when measuring volumetric flow. It has no movable mechanical parts with high reliability and little maintenance.

 OPERATION PRINCIPLES  

Setting vortex generation body (bluff body) in fluid, regular vortex will alternately generate from two sides of the vortex generation body. This kind of vortex is called Karman vortex. See picture 1. Vortex is at downstream of the vortex generation body, unsymmetrical array. Set occurrence to be f , average flow speed of measured medium U, face width d, and diameter D. According to Karman principle, exciting following relation :

f = StU1/d = StU/md

U1 – average flow speed at two sides of vortex generation body, m/s

St – Strouhal number

m – the ratio of segment area and pipeline cross-sectional area

Instantaneous volumetric flow :

In the formula K — Instrument Coefficient, pulse number/m3 (P/m3)

K has a relation with the vortex generation body, pipeline dimension and Strouhal number. Strouhal number is a parameter without dimension. It has something to do with the shape of the vortex generation body and Reynolds number. Seeing from the picture, in the range of Re = 2 * 104 ~ 7 * 106, St can be seen to be a constant. When measuring gas flow, the flow calculation formula of JC-080 is

Diagram 2 Relation Curve of Strouhal number and Reynolds number

In the formula, Qvn, Q — volumetric flow under standard conditions and working conditions, m3/h

Pn, P — absolute pressure under standard conditions and working conditions, Pa.

 

Tn, T — thermodynamics temperature under standard conditions and working conditions, K

Zn, Z — gas compression coefficient under standard conditions and working conditions

Seeing from the above formula, pulse frequency signal output by JC-080 is not influenced by fluid physical properties and component changes, that is, the instrument coefficient only has relation with the vortex generation body and the dimension of the pipeline in a certain range of Reynolds number. But the flowmeter must measure mass flow in material balance and energy measurement, here the output signal of the flowmeter should monitor volumetric flow and fluid density, therefore, fluid physical properties and components have a direct influence on flow measurement.

MODEL SELCETION

Code Nominal Diameter (mm) Flow Range (m3/h) Remarks
JC-080-25

JC-080-32

JC-080-40

JC-080-50

JC-080-65

JC-080-80

JC-080-100

JC-080-125

JC-080-150

JC-080-200

JC-080-250

JC-080-300

DN25

DN32

DN40

DN50

DN65

DN80

DN100

DN125

DN150

DN200

DN250

DN300

1.4~12(L)  8.8~124(G)  7-124(S)

2.0~20(L)  15~200(G)  12-200(S)

3.2~36(L)  23~300(G)  18-300(S)

5~56(L)   35~450(G)   28-450(S)

8.2~96(L)  63~820(G)  50-820(S)

12.5-145(L) 90~1200(G) 75-1200(S)

20~224    142~1950   120-1950

30~352 220~3000 175-3000         44~512   320~4400    260-4400

79~920   565~7800    440-7800

140-1200  850-12400      720-12400

175-2020   1250-17500    1020-17500

1. Make reference to sheet 3 for steam flow range

2. DN250 ~ DN600 can be provided according to customers’ requirements

3. For DN300 and above, we recommend Insertion Type Vortex Flowmeter

4. L is liquid ,G is gas , S is steam

 

Code Function 1
N

Y

No Temperature & Pressure compensation

Temperature & Pressure compensation provided

Code Output               Code   Output  
F1

F3

4 ~ 20 mA (two wires)   F2    4-20ma (three wires)

RS 485 interface        F4     Pulse/Frequency

Code Medium       Code      Medium
J1

J2

Liquid          J3       Steam

Gas

Code Connection
L1

L2

Wafer Type

Flange Connection Type

Code Function 2
E1

E2

T1

T2

T3

P1

P2

P3

P0

D1

D2

I

R

1.0

1.5

Normal temperature

High Temperature

Steam

1.6 MPa

2.5 MPa

4.0 MPa

Special pressure

Internal 3.6 V

24V DC

Integral type

Remote type (10M cable )

 

JC-080-25     Y                   F1     J1     L1    E1T1P1D2 I
Explaination :  

Size:DN25

Y: Temperature & Pressure compensation provided

F1 :4 ~ 20 mA (two wires) for output  

J1:  Medium  is Liquid

L1:  Wafer Type

E1: 1.0   for accuracy

T1: Normal temperature

P1:1.6 MPa

D2:24V DC

I: Integral type   

Attention  :  Vortex Flowmeter can’t apply in the site with vibration .

 

Additional information

Medium

Gas, liquid, steam

Size

25, 32, 50, 80, 100, 150, 200, 250, 300

Measuring Range

Reynold number 1.5 * 104 ~ 4 * 106; gas 5~50m/s;
liquid 0.5~7m/s

Accuracy

Class 1.5

Temperature

Normal temperature -25℃~100℃
High temperature -25℃~150℃ -25℃~250℃

Output Signal

Pulse voltage output signal,4 ~ 20 mA, transmission distance 100m

Environmental Conditions

Temperature: -25℃~+55℃ humidity: 5~90%

Material

Stainless Steel , Aluminum Alloy

Power

24 V DC or lithium battery 3.6V

Protection Class

IP65

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