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Card mounted vortex flowmeter
Card mounted vortex flowmeter
Card mounted vortex flowmeter
Card mounted vortex flowmeter

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涡街流量计涡街流量计涡街流量计涡街流量计
Setting up a vortex generator (blocking fluid) in the fluid and alternately generating regular vortices from both sides of the vortex generator is called a Karman vortex street, as shown in Figure 1. The vortices are arranged asymmetrically downstream of the vortex generator. Assuming the frequency of vortex occurrence is f, the average velocity of the incoming flow of the measured medium is U, the width of the vortex generator face is d, and the diameter of the body is D, according to the principle of Karman vortex street, there is the following relationship:涡街流量计公式
In the formula:
涡街流量计公式- Average flow velocity on both sides of the vortex generator, m/s
涡街流量计公式Strouhal number
涡街流量计公式The ratio of the bow shaped area on both sides of the vortex generator to the cross-sectional area of the pipeline
涡街流量计公式
涡街流量计原理
Kaman Vortex Street
InstantTime volume flow rate涡街流量计公式For: 涡街流量计公式
In the formula, K represents the instrument coefficient of the flowmeter, with pulse count in m3 (P/m3)
K is not only related to the geometric dimensions of the vortex generator and pipeline, but also to the Strouhal number. The Strouhal number is a dimensionless parameter that is related to the shape of the vortex generator and the Reynolds number. Figure 2 shows the relationship between the Strouhal number of a cylindrical vortex generator and the Reynolds number of a pipeline
As shown in the figure, within the range of Re=2 × 104~7 × 106, St can be regarded as a constant, which is the normal operating range of the instrument
涡街流量计原理
The relationship curve between Strouhal number and Reynolds number
涡街流量计结构组成
涡街流量计结构组成 涡街流量计结构组成
1. Converter 2. Support rod 3. Sensor housing 4. Detection element 5. Vortex generator 6. Temperature and pressure compensation device (including: temperature sensor, pressure sensor, shut-off valve, condenser bend)
涡街流量计产品特点
1. Small pressure loss, large range, and high accuracy;
When measuring the volumetric flow rate under working conditions, it is almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc;
3. No movable mechanical parts, therefore high reliability and low maintenance;
4. The instrument parameters can remain stable for a long time. This instrument adopts a piezoelectric stress sensor with high reliability and can operate within a temperature range of -25 ℃ to+320 ℃;
5. It has a wide range of applications and can measure the flow rates of fluids such as steam, gas, and liquid;
6. Humanized menu and interface based on dot matrix display, with bright backlight, supporting both Chinese and English languages, suitable for various customer groups;
7. Support temperature and pressure measurement, convenient for gas medium temperature and pressure compensation needs;
8. Support flow rate conversion display function, convenient for on-site viewing of current flow rate;
9. Support split screen display function, which can enlarge and display single or two parameters (temperature, pressure, operating conditions, flow rate and flow rate under standard conditions, etc.) on the screen;
10. Simulation output function, supporting 4-20mA current simulation and frequency output simulation, convenient for on-site non real current debugging;
11. Supports 4-20mA output, pulse (equivalent) output, alarm output, RS485 communication output;
Both two-wire and three wire systems have DCDC (DC1000V) isolation;
涡街流量计产品参数
1. Main technical parameters
Measurement medium Gas, liquid, steam
Execution standards Vortex flow sensor (JB/T 9249-1999)
Verification regulations Vortex flowmeter (JJG 1029-2007)
Connection method Card mounted, flange mounted
Nominal diameter DN25、DN32、DN40、DN50、DN65、DN80、DN100、DN125、DN150、DN200、DN250、DN300
Flange standard Conventional standards GB/T9113-2000
Other standards International pipe flange standard Such as German standard DIN, American standard ANSI, Japanese standard JIS
Domestic pipe flange standards Such as the standards of the Ministry of Chemical Industry and the Ministry of Machinery
Verification conditions Verification device Sonic nozzle flow verification device
Accuracy level Level 1.5
Range ratio 1:10
Flow velocity range Liquid: 0.5-7m/s Gas: 5-50m/s
Instrument material 304 stainless steel, 316 stainless steel
temperature range -25 ℃ to 100 ℃- 25 ℃~+280 ℃- 25℃～+320℃
Pressure level 1.6MPa, 2.5MPa, 4.0MPa
output signal Pulse frequency signal
Two wire 4-20mA DC current signal
485 communication
Power supply 24V DC
Explosion proof grade Basic Type: Non Explosion proof Product, Explosion proof Type: Exd Ⅱ BT4
Protection level IP65
environment condition Environmental temperature: -25 ℃~55 ℃ Relative humidity: 5~90% Atmospheric pressure: 86~106KPa
2. Flow range of liquid and working gas
Diameter DN (mm) Liquid (m3/h) Gas (m3/h) Diameter DN (mm) Liquid (m3/h) Gas (m3/h)
25 1~12 8~80 100 20~200 140~1400
32 1.5～23 15~150 125 31~310 220~2200
40 2.4～32 23~230 150 45~450 300~3000
50 6.3～84 35~350 200 80~800 550~5500
65 10~130 60~600 250 150~1500 880~8800
80 10~130 90~900 300 200~2000 1300~13000
3. Density of commonly used gas media under standard conditions (0.1013mbar, 20 ℃)
Gas Density (Kg/m3) Gas Density (Kg/m3) Gas Density (Kg/m3)
acetylene 1.083 N-butane 2.1463 ethane 1.2500
ammonia 0.7080 ethylene 1.1660 methane 0.6669
propane 1.8332 neon 0.83914 Natural gas 0.776
air 1.2041 argon 1.6605 carbon dioxide 1.829
carbon monoxide 1.165 hydrogen 0.0838 oxygen 1.3302
propylene 1.7459 nitrogen 1.1646
4. Saturated vapor density table
Gauge pressure (MPa) Temperature (℃) Density (kg/m3) Gauge pressure (MPa) Temperature (℃) Density (kg/m3)
0.1 120.23 1.129 1.0 184.15 5.641
0.2 133.54 1.651 1.1 187.96 6.127
0.3 143.62 2.163 1.3 195.04 7.106
0.4 151.84 2.669 1.5 201.37 8.085
0.5 158.94 3.170 1.7 207.11 9.065
0.6 164.96 3.667 1.9 212.37 10.05
0.7 170.41 4.162 2.1 217.32 11.032
0.8 175.36 4.655 2.3 221.86 12.019
0.9 179.88 5.147 2.5 226.11 13.011
5. Superheated steam density table
cut offPressure P (MPa） Temperature t (℃)
100 110 120 130 140 150 160 170 180
0.1 0.590 0.573 0.558 0.543 0.529 0.516 0.504 0.492 0.481
0.2 —— —— 1.137 1.099 1.070 1.042 1.016 0.992 0.969
0.3 —— —— —— 1.674 1.622 1.578 1.537 1.499 1.463
0.4 —— —— —— —— 2.197 2.125 2.067 2.014 1.964
0.5 —— —— —— —— —— 2.666 2.608 2.528 2.472
0.6 —— —— —— —— —— —— 3.159 3.071 2.989
0.7 —— —— —— —— —— —— —— 3.614 3.514
0.8 —— —— —— —— —— —— —— 4.168 4.048
0.9 —— —— —— —— —— —— —— —— 4.591
1.0 —— —— —— —— —— —— —— —— 5.145
1.1 —— —— —— —— —— —— —— —— ——
1.2 —— —— —— —— —— —— —— —— ——
1.3 —— —— —— —— —— —— —— —— ——
1.4 —— —— —— —— —— —— —— —— ——
1.5 —— —— —— —— —— —— —— —— ——
1.6 —— —— —— —— —— —— —— —— ——
1.7 —— —— —— —— —— —— —— —— ——
1.8 —— —— —— —— —— —— —— —— ——
1.9 —— —— —— —— —— —— —— —— ——
2.0 —— —— —— —— —— —— —— —— ——
2.1 —— —— —— —— —— —— —— —— ——
2.2 —— —— —— —— —— —— —— —— ——
2.3 —— —— —— —— —— —— —— —— ——
2.4 —— —— —— —— —— —— —— —— ——
2.5 —— —— —— —— —— —— —— —— ——
2.6 —— —— —— —— —— —— —— —— ——
2.7 —— —— —— —— —— —— —— —— ——
2.8 —— —— —— —— —— —— —— —— ——
2.9 —— —— —— —— —— —— —— —— ——
3.0 —— —— —— —— —— —— —— —— ——
3.1 —— —— —— —— —— —— —— —— ——
3.2 —— —— —— —— —— —— —— —— ——
3.3 —— —— —— —— —— —— —— —— ——
3.4 —— —— —— —— —— —— —— —— ——
3.5 —— —— —— —— —— —— —— —— ——
3.6 —— —— —— —— —— —— —— —— ——
3.7 —— —— —— —— —— —— —— —— ——
3.8 —— —— —— —— —— —— —— —— ——
3.9 —— —— —— —— —— —— —— —— ——
4.0 —— —— —— —— —— —— —— —— ——
Absolute pressure P (MPa)） Temperature t (℃)
190 200 210 220 230 240 250 260 270
0.1 0.471 0.460 0.451 0.441 0.432 0.424 0.416 0.408 0.400
0.2 0.947 0.926 0.906 0.887 0.868 0.851 0.834 0.818 0.803
0.3 1.428 1.396 1.365 1.336 1.308 1.281 1.256 1.231 1.208
0.4 1.916 1.872 1.829 1.789 1.751 1.715 1.680 1.647 1.615
0.5 2.411 2.353 2.299 2.247 2.198 2.152 2.108 2.066 2.052
0.6 2.912 2.841 2.773 2.710 2.650 2.593 2.539 2.487 2.438
0.7 3.421 3.334 3.253 3.178 3.106 3.038 2.973 2.911 2.853
0.8 3.937 3.834 3.738 3.650 3.565 3.486 3.411 3.389 3.271
0.9 4.461 4.342 4.230 4.127 4.029 3.939 3.852 3.769 3.691
1.0 4.995 4.857 4.728 4.610 4.498 4.394 4.297 4.023 4.115
1.1 5.538 5.379 5.233 5.088 4.973 4.855 4.745 4.641 4.542
1.2 6.089 5.909 5.745 5.593 5.452 5.321 5.197 5.082 4.972
1.3 6.614 6.448 6.263 6.093 5.936 5.790 5.654 5.526 5.402
1.4 —— 6.996 6.789 6.600 6.426 6.265 6.115 5.974 5.841
1.5 —— 7.554 7.324 7.114 6.922 6.744 6.579 6.425 6.280
1.6 —— —— 7.866 7.635 7.423 7.229 7.049 6.880 6.723
1.7 —— —— 8.418 8.163 7.931 7.719 7.522 7.340 7.169
1.8 —— —— 8.978 8.699 8.446 8.214 8.001 7.803 7.619
1.9 —— —— 9.549 9.234 8.967 8.715 8.484 8.271 8.072
2.0 —— —— —— 9.795 9.485 9.222 8.973 8.743 8.529
2.1 —— —— —— 10.356 10.030 9.735 9.466 9.219 8.990
2.2 —— —— —— 10.927 10.573 10.255 9.965 9.700 9.455
2.3 —— —— —— 11.507 11.124 10.781 10.470 10.186 9.924
2.4 —— —— —— —— 11.683 11.313 10.980 10.676 10.397
2.5 —— —— —— —— 12.250 11.853 11.496 11.172 10.875
2.6 —— —— —— —— 12.827 12.401 12.019 11.673 11.356
2.7 —— —— —— —— 13.414 12.957 12.547 12.179 11.843
2.8 —— —— —— —— —— 13.519 13.082 12.690 12.334
2.9 —— —— —— —— —— 14.090 13.624 13.208 12.830
3.0 —— —— —— —— —— 14.671 14.174 13.731 13.331
3.1 —— —— —— —— —— 15.260 14.731 14.260 13.837
3.2 —— —— —— —— —— 15.859 15.295 14.796 14.348
3.3 —— —— —— —— —— 16.468 15.868 15.338 14.864
3.4 —— —— —— —— —— —— 16.448 15.887 15.387
3.5 —— —— —— —— —— —— 17.037 16.442 15.914
3.6 —— —— —— —— —— —— 17.636 17.007 16.447
3.7 —— —— —— —— —— —— 18.245 17.578 16.990
3.8 —— —— —— —— —— —— 18.861 18.155 17.535
3.9 —— —— —— —— —— —— 19.489 18.741 18.087
4.0 —— —— —— —— —— —— —— 19.335 18.646
Absolute pressure P (MPa) Temperature t (℃)
280 290 300 310 320 330 340 350
0.1 0.393 0.386 0.379 0.372 0.366 0.360 0.354 0.348
0.2 0.788 0.774 0.760 0.747 0.734 0.721 0.709 0.698
0.3 1.185 1.163 1.142 1.122 1.103 1.084 1.066 1.049
0.4 1.585 1.555 1.527 1.500 1.474 1.449 1.424 1.400
0.5 1.986 1.949 1.914 1.879 1.846 1.815 1.784 1.754
0.6 2.391 2.345 2.302 2.260 2.220 2.182 2.145 2.109
0.7 2.797 2.743 2.693 2.643 2.596 2.551 2.507 2.465
0.8 3.206 3.145 3.085 3.028 2.974 2.921 2.871 2.822
0.9 3.608 3.547 3.479 3.405 3.352 3.293 3.236 3.181
1.0 4.032 3.952 3.876 3.804 3.734 3.667 3.602 3.541
1.1 4.448 4.359 4.275 4.195 4.117 4.042 3.971 3.902
1.2 4.869 4.771 4.675 4.587 4.500 4.419 4.304 4.264
1.3 5.291 5.181 5.079 4.980 4.888 4.789 4.710 4.630
1.4 5.718 5.596 5.485 5.376 5.274 5.179 5.084 4.995
1.5 6.143 6.013 5.893 5.777 5.666 5.559 5.459 5.362
1.6 6.575 6.435 6.301 6.177 6.057 5.942 5.834 5.730
1.7 7.008 6.859 6.716 6.579 6.541 6.329 6.211 6.099
1.8 7.446 7.283 7.133 6.983 6.849 6.716 6.592 6.470
1.9 7.886 7.710 7.547 7.391 7.246 7.102 6.969 6.843
2.0 8.333 8.143 7.968 7.800 7.645 7.496 7.353 7.217
2.1 8.777 8.578 8.391 8.214 8.047 7.888 7.737 7.593
2.2 9.227 9.015 8.816 8.628 8.451 8.283 8.123 7.970
2.3 9.681 9.455 9.244 9.045 8.679 8.510 8.349 8.349
2.4 10.139 9.899 9.675 9.464 9.265 9.078 8.899 8.729
2.5 10.061 10.347 10.108 9.886 9.676 9.478 9.290 9.112
2.6 11.066 10.797 10.545 10.310 10.089 9.880 9.680 9.495
2.7 11.534 11.250 10.984 10.737 10.504 10.285 10.078 9.880
2.8 12.008 11.706 11.427 11.167 10.922 10.962 10.473 10.267
2.9 12.484 12.167 11.872 11.598 11.342 11.100 10.872 10.656
3.0 12.967 12.630 12.321 12.034 11.765 11.511 11.273 11.047
3.1 13.542 13.099 12.773 12.470 12.189 11.925 11.674 11.439
3.2 13.941 13.570 13.229 12.912 12.617 12.340 12.079 11.833
3.3 14.436 14.047 13.687 13.355 13.046 12.757 12.484 12.228
3.4 14.937 14.526 14.148 13.801 13.479 13.177 12.893 12.626
3.5 15.439 15.008 14.616 14.251 13.914 13.598 13.303 13.025
3.6 15.949 15.497 15.073 14.704 14.351 14.023 13.716 13.426
3.7 16.464 15.990 15.557 15.158 14.791 14.449 14.130 13.829
3.8 19.984 16.485 16.033 15.618 15.235 14.879 14.546 14.235
3.9 17.507 16.997 16.513 16.080 15.681 15.312 14.966 14.641
4.0 18.038 17.492 16.998 16.545 16.129 15.746 15.387 15.049
涡街流量计产品外形尺寸
The Focvor series vortex flowmeter has two connection methods and external dimensions

涡街流量计产品外形尺寸
name orifice pressure rating Total length Height Width Temperature pressure distance flange outer diameter Outer diameter of shell Center distance of bolt holes Quantity and aperture
DN Mpa L G1 G2/G3 G4 D d K N*L
Card mounted unit (mm) 25 4.0 90 430 235 145 —— Φ57 —— ——
32 4.0 90 435 235 145 —— Φ65 —— ——
40 4.0 90 440 235 145 —— Φ75 —— ——
50 4.0 90 460 235 145 —— Φ87 —— ——
65 1.6 90 475 240 150 —— Φ109 —— ——
80 1.6 100 510 240 150 —— Φ120 —— ——
100 1.6 100 530 250 160 —— Φ149 —— ——
125 1.6 100 555 290 200 —— Φ175 —— ——
150 1.6 100 585 330 230 —— Φ203 —— ——
200 —— —— ——
250 —— —— ——
300 —— —— ——
Flange unit (mm) 25 4.0 170 460 235 145 Φ115 —— Φ85 4×Φ14
32 4.0 174 475 235 145 Φ140 —— Φ100 4×Φ18
40 4.0 180 480 235 145 Φ150 —— Φ110 4×Φ18
50 4.0 186 500 235 145 Φ165 —— Φ125 4×Φ18
65 1.6 186 515 240 150 Φ185 —— Φ145 4×Φ18
80 1.6 200 550 250 150 Φ200 —— Φ160 8×Φ18
100 1.6 204 565 270 160 Φ220 —— Φ180 8×Φ18
125 ——
150 ——
200 ——
250 ——
300 ——
涡街流量计产品选型

涡街流量计产品选型涡街流量计产品选型
涡街流量计接线指南
1. Wiring terminal diagram
涡街流量计接线指南
2. Meaning of wiring terminals
communication A RS485 communication A
B RS485 communication B
24V DC + 24V DC power input (positive)
- 24V DC power input (negative)
electric current I+ 4~20mA output
frequency P+ 24V frequency, pulse output
call the police AH Upper limit alarm output
AL Lower limit alarm output
3. Wiring diagram
① Two wire 4-20mA output ② Three wire system with 4-20mA output
涡街流量计接线示意图 涡街流量计接线示意图
③ 24V frequency, pulse output ④ RS485 communication interface output
Note: The negative terminal of frequency output and the negative terminal of DC 24V are common terminals; The frequency and pulse output must be wired according to a three wire system, as shown in the diagram below. The two-wire system does not support frequency and pulse output; The default factory frequency and pulse output are active outputs; The default factory frequency and pulse output idle level are high level, and low level when pulses are received. Note: RS485 communication must be wired according to a three wire system, as shown in the diagram below. Two wire system does not support RS485 communication.
涡街流量计接线示意图 涡街流量计接线示意图
⑤ Alarm signal output ⑥ Power supply
Note: The alarm output must be wired according to the three wire system, as shown in the diagram below. The two wire system does not support alarm output.
When the flow meter requires flow pulse signal output, an external power supply with a supply voltage of+24V DC is required (Three line system).
When the flowmeter requires a 4-20mA current signal output, a+24V DC external power supply (two-wire or three wire system) needs to be added.
When the flowmeter requires RS485 data communication, a+24V DC power supply needs to be added. (Three line system).
涡街流量计接线示意图
4. Electrical characteristics
① Two wire system: The maximum value is 26V DC, and the minimum value depends on the load,
The conversion formula is: RL=(Umin-17)/0.022， Umin=RL * 0.022+17
Where RL is the load resistance, measured in ohms; Umin is the minimum supply voltage, measured in volts, and should not exceed a maximum of 26V DC.
For example, for a 250 Ω load, the minimum supply voltage Umin is 250 * 0.022+17=22.5V.
② Three wire system: power supply range: 12-26V DC; Power: 940mW MAX @ 26V DC
涡街流量计安装要求
Vortex flow meters are sensitive to flow velocity distribution distortion, rotational flow, and flow pulsation in pipelines. Therefore, the installation conditions of pipelines on site should be fully taken into account, and the requirements of the manufacturer's instructions should be followed.
Vortex flow meters are sensitive to flow velocity distribution distortion, rotational flow, and flow pulsation in pipelines. Therefore, the installation conditions of pipelines on site should be fully taken into account, and the requirements of the manufacturer's instructions should be followed. Vortex flowmeter can be installed indoors or outdoors. If installed in underground wells, there is a possibility of flooding, and submersible sensors should be selected. Sensors can be installed horizontally, vertically, or obliquely on pipelines, but when measuring liquids and gases, attention should be paid to the installation position to prevent interference from bubbles and droplets.
1. Installation of mixed phase fluids
涡街流量计安装要求
(a) Installation of flow meters for measuring gases containing liquids; (b) Installation of measuring gas-liquid flow meter
2. Requirements for downstream straight pipe length of vortex flowmeter
涡街流量计安装要求
(a) A 90 ° elbow; (b) Concentric expansion tube; (c) Concentric contraction fully open valve; (d) Two 90 ° elbows on different planes; (e) Half open regulating valve; (f) Two 90 ° elbows on the same plane
3. Connection between sensors and pipelines
涡街流量计安装要求
4. Schematic diagram of bypass pipeline
1) The inner diameter D of the upstream and downstream piping is the same as the inner diameter D 'of the sensor, and the difference satisfies the following condition: 0.95D ≤ D' ≤ 1.1D.
2) The piping should be concentric with the sensor, and the coaxiality should not be less than 0.05D '.
3) The sealing gasket cannot protrude into the pipeline, and its inner diameter can be 1-2mm larger than the inner diameter of the sensor.
4) If it is necessary to cut off the flow for inspection and cleaning of the sensor, a bypass pipeline should be set up as shown in the figure.
涡街流量计旁通管道示意图
5. Example of installing pipeline support
The impact of dynamic sources on vortex flowmeters should be addressed as a prominent issue in the on-site installation of vortex flowmeters. Firstly, when selecting the installation location for sensors, try to avoid vibration sources as much as possible. Secondly, elastic hoses can be used for connection, which can be considered for small diameters. Thirdly, installing pipeline supports is an effective vibration reduction method, as shown in the figure.
涡街流量计旁通管道示意图
6. Electrical installation should pay attention to using shielded cables or low-noise cables to connect sensors and converters. When wiring, it should be kept away from high-power power lines and protected with separate metal sleeves as much as possible. The principle of "one point grounding" should be followed, and the grounding resistance should be less than 10 Ω. Both integral and separated types should be grounded on the sensor side, and the grounding point of the converter housing should be "same ground" as the sensor.
涡街流量计常见故障及方法
Fault phenomenon Possible reasons processing method
When there is no flow after power on, there is an output signal 1. Poor input shielding or grounding introduces electromagnetic interference 1. Improve shielding and grounding to eliminate electromagnetic interference
2. The instrument is located near strong electrical equipment or high-frequency pulse interference sources 2. Install away from interference sources and take isolation measures to strengthen power filtering
3. The pipeline has strong vibration. 3. The pipeline has strong vibration 3. Adopt limited shock absorption measures.
No output signal after passing current 1. Power supply malfunction 1. Check the power supply and grounding
2. The incoming signal line is disconnected 2. Check the signal wires and wiring terminals
3. No traffic or low traffic 3. Check the sensing components and leads, inspect the valve, increase the flow rate or decrease the pipe diameter
4. Pipeline blockage or sensor jamming 4. Check and clean the pipeline, clean the sensor
The output signal is irregular and unstable 1. There is a strong electrical interference signal 1. Strengthen shielding and grounding
2. The sensor is contaminated or damp, resulting in a decrease in sensitivity 2. Clean or replace the sensor to increase the amplifier gain
3. Sensor damage or poor lead contact 3. Check the sensors and leads
4. Two phase flow or pulsating flow occurs 4. Strengthen process management and eliminate two-phase flow or pulsating flow phenomena
5. The impact of pipeline vibration 5. Adopt limited shock absorption measures
6. Unstable process flow 6. Adjust the installation position
7. Sensor installation is not concentric or the sealing gasket protrudes into the pipe 7. Check the installation condition and correct the inner diameter of the sealing gasket
8. Upstream and downstream valve disturbance 8. Extend the straight pipe section or install a flow regulator
9. Fluid not filling the pipeline 9. Change the location and method of installing the flow sensor
10. There are entanglements in the body that occur 10. Eliminate entanglement
11. Existence of air pockets 11. Reduce the flow rate and increase the pressure inside the pipe
Leakage of measuring tube 1. Excessive pressure inside the pipe 1. Adjust the pipe pressure and change the installation position
2. Incorrect selection of nominal pressure 2. Choose a higher-level nominal pressure sensor
3. The seal is damaged and the sensor is corroded 3. Replace the sealing components and take anti-corrosion and protective measures
Large measurement error 1. Insufficient length of straight pipe section 1. Extend the straight pipe section or install a flow regulator
2. Incorrect zero drift or full-scale adjustment of analog conversion circuit 2. Calibrate zero and range scales
3. Excessive changes in power supply voltage 3. Check the power supply
4. The instrument exceeds the calibration cycle 4. Timely submission for inspection
5. There is a significant difference in the inner diameter between the sensor and the piping 5. Check the inner diameter of the piping and correct the instrument coefficient
6. Install non concentric or gasket protruding into the pipe 6. Adjust the installation and repair the sealing gasket
7. Sensor contamination or damage 7. Clean and replace the sensor
8. There is two-phase flow or pulsating flow 8. Exclude two-phase flow or pulsating flow
9. Pipeline leakage 9. Eliminate leaks
The sensor emits an abnormal whistling sound 1. Excessive flow velocity causes strong vibration 1. Adjust the flow rate or replace the instrument with a larger diameter
2. Generating cavitation phenomenon 2. Adjust the flow rate and increase the liquid flow pressure
3. Body loosening occurs 3. Tighten the generator
1) Users are not allowed to change the wiring method of the explosion-proof system or arbitrarily twist various output line connectors.
2) When the flowmeter is running, it is not allowed to arbitrarily open the front cover to change the instrument parameters, otherwise it will affect the normal operation of the flowmeter.
3) Do not loosen the fixed part of the flowmeter at will.
4) When using the product outdoors, it is recommended to add a waterproof device.
涡街流量计产品包装
涡街流量计产品包装
涡街流量计物流说明
涡街流量计物流说明
涡街流量计企业资质涡街流量计营业执照
涡街流量计客户现场图
涡街流量计公司车间
涡街流量计买家必读

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