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electromagnetic flowmeter

An electromagnetic flowmeter is composed of two parts- electromagnetic flow sensor and electromagnetic flow transducer
INQUIRY
Description SELECTION CRITERIA INSTALLATION AND USE FIELD INSTALLATION

An electromagnetic flowmeter is composed of two parts- electromagnetic flow sensor and electromagnetic flow transducer.
The operation of an electromagnetic flowmeter is based on Faraday law ofelectromagnetic induction.The mainly parts of the sensor are: measuring tube、electrode poles、excitation coil、iron core、yoke and housing. The measuringtube of the sensor is a short alloy tube whose diameter is D, the inner sufaceof it has an insulating liner.Two electrodes are fixed in the measuring tubealong with the diameter direction of it and they usually flush with the inner surfaceliner.When excitation coil pulsed by two-way square wave,there generatesa working magnetic field with a flux density B in the vertical direction ofthemeasurement axis.In the meantime,if some electrical conductivity liquidflows at an average velocity V through the measuring tube ,cuts lines of themagnetic field,there generates induced electromotive force E.Electromotiveforce E is directly proportional to the product of flux density B、measuring tubediameter D and average velocity V,that's: E BVD. Electromotive force E(flowsignal) is measured by the electrodes and transmitted to transducer throughcable.After the transducer handles the flow signal by magnifying it, the flowand total amount can be displayed,also will output pulse and  current etc. The transducer of RXLDBE type electromagnetic flowmeter has an intelligentindicator suggesting Chinese characters LCD display.

Standard

JB/T9248-1999

Nominal diameter

3、6、10、15、20、25、32、40、50、65、80、100、125、150、200、250、300、350、400、450、500、600、700、800、900、1000、1200、1400、1600、1800、2000、2200、2400、2600、2800、3000

Maximum flowrate

15m/s 

Accuracy class

Indication result±0.5%(Flowrate0.8m/s);±4mm/s(Flowrate<0.8m/s)

Fluid conductivity

≥5μS/cm

Nominal pressure

4.0 MPa

1.6 MPa

1.0 MPa

0.6 MPa

6.3、10 MPa etc

DN3~DN150

DN15~DN600

DN200~DN1000

DN700~DN3000

Special order

Lining material

Polytetrafluoroethylene、Neoprene、Polyurethane、Fluororesin-46(F46)、PFA with stainless steel net

Ambient

temperature

Sensor

-25℃~+60℃

Transducer and integrated type

-10℃~+60℃

Maximum

Fluid

temperature

Integrated type

70℃

Divided type

Neoprene lining

80℃;120℃(Note it in the order)

Polyurethane rubber lining

80℃

Polytetrafluoroethylene lining

100℃;150℃(Note it in the order)

Fluororesin-46(F46)

PFA with stainless steel net

Material of signal electrode and ground electrode

Stainless steel0Cr18Ni12Mo2Ti、Hastelloy C、Hastelloy B、Titanium、Tantalum、

Platinum/Iridium alloy、Stainless steel coating with tungsten carbide

Electrode drawknife apparatus

DN80~DN3000

Connection flange material

Carbon steel

Connection ring material

Stainless steel1Cr18Ni9Ti

Housing protection

DN15~DN3000 divided type rubber or polyurethane lining sensor

IP65 or IP68

Integrated type(round transducer )

IP67

Other sensors and divided type transducers

IP65

Sign of explosionproof instrument

Ex dmⅡCT4

Only integrated type、IP65、magnetic flux linkage、DN15~DN600

Distance(divided type)

The distance from transducer to sensor usually whinthin 100m,over 100m should make a special order


a.Connection form

A.Flanged connection

B.Gripping type

f. Housing protection

1.IP65

2.IP68+IP65(SensorIP68+TransducerIP65)(Code c can only choose

2,3;Code f can only choose 0;Code h can only choose CR;Code j can

only choose 01~06)

3.IP67(Code c can only choose 2,3;Code f can only choose 0;Code h

can only choose CH;Code j can only choose 07~10).

b Nominal diameter(mm)                     

Code   Bore   Code   Bore   Code   Bore

015     15    250    250    10A    1000

020     20    300    300    12A    1200

025     25     350    350    14A    1400

040     40    400    400    16A    1600

050     50    450    450    18A    1800

065     65    500    500    20A    2000

100     100   600    600    22A    2200

150     150   700    700    24A    2400

200     200   800    800    26A    2600

              900    900    28A    2800

                            30A    3000

 

g. Explosion-proof sign

0 Nil

1 ExdmⅡCT4(DN15~DN600);e can only choose 1

h. Attachments

0 Nil

1 Ground electrode(DN25~DN3000)

2 Ground ring(DN15~DN3000)

3 Electrode drawknife apparatus(DN80~DN3000)

C. Nominal pressure(MPa)

06           0.6          (DN700-DN3000)

10           1.0          (DN15-DN10000)

16           1.6          (DN15-DN600)

40           4.0          (DN15-DN150)

xx Special order

i. Structure

CR Divided type

CH Integrated type

j. Power supply

1 85~265V 45~400Hz

2 16~40V D.C.

d. Lining material

1.Polytetrafluoroethylene(F4)     (DN15~DN1000)

2.Neoprene                    (DN50~DN3000)

3.Polyurethane                 (DN15~DN600)

4.Fluororesin-46(F46)           (DN15~DN250)

5.PFA with stainless steel net    (DN50~DN250)

k. Transducer type

1.Square divided type、Key、Single electricity、_Double pulse、Two circuits alarm

2..Ball integrated type、Key、Single electricity、Monopulse、Two circuits alarm

3. Ball integrated type、Magnetic flux linkage、Single electricity、Monopulse、Two circuits alarm

4. Square divided type、Magnetic flux linkage、Single electricity、Double pulse、Two circuits alarm

Note: 1. Communication Protocol: RS232, RS485, Hart optional

2. The batch control function is optional

3. GPRS remote monitoring function optional

 

e. Electrode material

1.Stainless steel0Cr18Ni12Mo2Ti

2.Hastelloy B

3.Hastelloy C

4.Titanium

5.Platinum/Iridium alloy

6.Tantalu



 
 

 
DN15-DN150 profile、 dimensions and weight                                                      DN15-DN150DN15-DN150 flange dimensions(Standard:GB/T9119)

Nominal diameter

(DN)

L

H1 x W

H2

Weight for reference(Kg)

 

Nominal

diameter

(DN)

Pressure1.6MPa

Pressure4.0MPa

Integrated type

Sensor

D

d1

d0

n

b

D

d1

d0

n

b

15

200

174X140

112

10

7

15

95

65

14

4

16

95

65

14

4

16

20

200

174X140

112

12

9

20

105

75

14

4

18

105

75

14

4

18

25

200

174X140

116

14

11

25

115

85

14

4

18

115

85

14

4

18

32

200

210X168

116

15

12

32

140

100

18

4

18

140

100

18

4

18

40

200

210X176

142

16

13

40

150

110

18

4

20

150

110

18

4

20

50

200

210X176

144

17

14

50

165

125

18

4

20

165

125

18

4

20

65

200

250X214

157

25

22

65

185

145

18

4

20

185

145

18

8

22

80

200

250X214

175

29

26

80

200

160

18

8

20

200

160

18

8

24

100

250

312×230

200

31

28

100

220

180

18

8

22

235

190

22

8

26

125

250

370×281

226

36

33

125

250

210

18

8

22

270

220

26

8

26

150

300

370×281

254

41

38

150

285

240

22

8

24

300

250

26

8

28


DN200-DN600 profile~dimensions and weight                                       DN200-DN600 flange dimensions       

Nominal

diameter

(DN)

L

H

Weight

forreference

(Kg)

 

GB/T9119

Nominal

diameter

(DN)

Pressure 1.6 MPa

Pressure 1.0 MPa

D

d1

d0

n

b

D

d1

d0

n

b

200

350

Ø310

45

200

340

295

22

12

26

340

295

22

8

24

250

450

Ø358

50

250

405

355

26

12

28

395

350

22

12

26

300

500

Ø410

60

300

460

410

26

12

32

445

400

22

12

28

350

550

Ø465

145

350

520

470

26

16

35

505

460

22

16

30

400

600

Ø515

180

400

580

525

30

16

38

565

515

26

16

32

450

600

Ø564

215

450

640

585

30

20

42

615

565

26

20

35

500

600

Ø614

245

 

500

715

650

33

20

46

670

620

26

20

38

600

600

Ø722

335

 

600

840

770

36

20

52

780

725

30

20

42


DN700-DN3000 profile、 dimensions and weight          DN700-DN3000 flange dimensions

Nominal

diameter

(DN)

L

H

Weight

forreference

(Kg)

 

Nominal diameter

(DN)

PressureMPa

 

D

d1

d0

n

b

700

700

Ø836

435

700

1.0

895

840

30

24

30

800

800

Ø936

545

800

1015

950

33

24

32

900

900

Ø1036

655

900

1115

1050

33

28

34

1000

1000

Ø1136

810

1000

1230

1160

36

28

34

1200

1200

Ø1336

875

700

0.6

860

810

26

24

26

1400

1400

Ø1536

1235

800

975

920

30

24

26

1600

1600

Ø1736

1555

900

1075

1020

30

24

26

1800

1800

Ø1960

2085

1000

1175

1120

30

28

26

2000

2000

Ø2160

2610

1200

1405

1340

33

32

28

2200

2200

Ø2364

3210

1400

1630

1560

36

36

32

2400

2400

Ø2564

3910

1600

1830

1760

36

40

34

2600

2600

Ø2764

4280

1800

2045

1970

39

44

36

2800

2800

Ø2960

5000

2000

2265

2180

42

48

38

3000

3000

Ø3160

5600

2200

2475

2390

42

52

42

 

2400

 

2685

2600

42

56

44

2600

 

2905

2810

48

60

46

2800

 

3115

3020

48

64

48

3000

 

3315

3220

48

68

50

Correct hoisting To ensure the length ofthe straight pipe When installed vertically,flowing from
the bottom to top
 
The installation position should be
convenient for reading and operating
Relative position of two electrodes
is basically on the level
When installed vertically, flowing
from the bottom to top
 
Reasonable support,the sensor
cannot be used as load point
Centring the shims to avoid vortex Far away from flame
 
When discharging,should avoid the impac
of bubbles and negative pressure
To avoid negative pressure,the flowmeter
can't be installed on the suction side of
the pump
When the head is over 5m,should install an
automatic exhaust valve at the downstream
high position of the meter to prevent negative
pressure difference damaging the lining
 
To prevent leakage To avoid large temperature difference  To avoid strong vibration To avoid solarization

 

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