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FV10 series vortex flowmeter
FV10 series vortex flowmeter
FV10 series vortex flowmeter
Principle, structure

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Product details

Principle, structure

The vortex flowmeter uses the principle of Karman vortex street for measurement. A cylindrical object is vertically inserted into the measuring tube. When the fluid passes through the cylindrical object, under certain conditions, two columns of regular vortices will alternate on both sides of the column. As shown in the figure below, these two columns of vortices are called "Karman vortex streets". When d/D=0.281, the released vortices are the most stable. The frequency of Karman vortex street release is related to the velocity of fluid flow and the width of the cylindrical object. It can be simply expressed by the following formula:

F=St ×V/d

F： The release frequency of the Karman vortex street

St： For coefficients (known as Strouhal numbers)

V： For flow velocity

d： Column width

D： Instrument inner diameter

main features

● Integrated liquid, gas or vapor mass flow meter

Fully digital vortex street using DSP spectrum analysis technology and adaptive filtering technology

Independent of signal measurement sensors, it is a measurement vibration sensor with excellent seismic performance

Excellent low flow rate performance; Ultra wide range ratio 17:1

● Design of probe with built-in temperature

● Design of online replaceable detection pressure measurement

● Equipped with 10 point nonlinear correction function

● Can choose between HART communication protocol or RS485 communication (MODBUS protocol)

Modular circuit design and rich self diagnostic functions, easy to maintain

Fast response speed, suitable for process control and automatic adjustment

High temperature sensors can measure steam up to 400 ℃

Electrical isolation between output and power supply, with excellent anti-interference ability

The power supply includes AC and DC, making it convenient for users to choose

application

fluid condition industry
gas clean Metallurgical, paper-making, water treatment, chemical, light industry, textile, food and beverage, catering, agricultural irrigation, hydropower stations, oil fields, power and mining industries, etc
Easily dirty
liquid clean
Corrosive
Easily dirty
steam Saturated steam
superheated steam

performance parameter

Accuracy of vortex flowmeter
FV10 Pipeline Vortex Flow Meter
fluid Re： Reynolds number accuracy
liquid Re≥20000 ± 0.75% of the reading
10000＜Re＜20000 ± 1.5% of the reading
gas Re≥20000 ± 1% of the reading
vapor 10000＜Re＜20000 ± 1.5% of the reading
FV10 plug-in vortex flowmeter
fluid Re： Reynolds number accuracy
liquid Re≥20000 ± 1.5% of the reading
10000＜Re＜20000 ± 2.5% of the reading
gas Re≥20000 ± 1.5% of the reading
vapor 10000＜Re＜20000 ± 2.5% of the reading

● Repeatability: ± 0.1% of the measured value

Response time: less than 50ms in response to step changes in input

Stability: Stability for over one year is ± 0.1% of the measured value

The impact of ambient temperature: Exceeding the working temperature range is ± 0.25%

The impact of installation location: As long as the sensor is fully loaded and sufficient straight pipe sections are ensured in front and behind, the installation will not be affected.

● Startup time: It takes 50 milliseconds to start from zero traffic

Maximum range ratio: 28:1 (gas); 30:1 (liquid)

Sensor parameters

● Size: Clamping type: DN15 to DN150 ；

Flange type: DN15 to DN300 ；

Insertion type: DN200 to DN2800 ；

● Fluid temperature：Conventional type:- 30 to 280℃

High temperature type:- 30 to 400℃

● Sensor material:

Flange and shell: Stainless steel 1.4301 (304), stainless steel 1.4435 (316L)

Vortex generator: stainless steel 1.4301 (304), stainless steel 1.4435 (316L), and Monel alloy

Detector material: stainless steel 1.4435 (316L), Hastelloy and Monel alloy

Material of connector: Stainless steel 1.4301 (304) (connected to converter)

● Temperature sensor: PT100 is built-in in the detection probe, two-wire system

Pressure sensor: can be repaired and replaced online

● Process connection: DIN PN10 to PN160

ANSI class 150、300、600、900、1500

JIS 10k /JIS 20K

Clamp type (Wafer)

Pressure loss: Calculate the maximum pressure loss according to the formula shown in the figure on the right

● Inlet pressure: When measuring liquid flow rate, the minimum requirement of the flowmeter for inlet pressure is calculated according to the formula

Reynolds number: 10000<Re<700000

Sensor parameters

● Environmental temperature range:- 20 to 140O F (-29 to 60 ℃ )；

● Shell material: Low copper die cast aluminum Nema 4X, IEC60529 IP66 (standard), customizable stainless steel converter shell material

● Power supply: DC 16V to 36V, 1A quick fuse

● Current output: 4 to 20 mA output, active output, isolated from the power supply. The relationship between load resistance and power supply is shown in the following diagram

Pulse output: 0-5000Hz, active output, NPN mode, with built-in pull-up resistor, duty cycle of 50%

● Switch output: high and low alarm, two sets of normally open contacts, driving capacity of 24VDC, 30mA, driving impedance greater than 800 ohms for relays, alarm lights, and valves

● Display: LED LCD, 4-line display, with backlight; The display digits for instantaneous flow and total amount are 9 digits

Instantaneous flow unit: m³/h、m³/m、m³/s、Gal、USAG/m、USAG/s、kg/h、kg/m、kg/s、t/h、t/m

Total unit: m³、Gal、L、kg、t

Temperature unit: ℃

Pressure unit: Mpa

Density unit: kg/m³

Frequency unit: HZ

Algorithm selection:

Optional algorithms Measurement medium Measurement and display flow unit Output current 4 to 20mA pulse output RS485 output
Gas operating condition volume flow rate gas Volume flow rate and temperature under operating conditions m³ Operating flow rate m ³/h Standard configuration All parameters and data
Gas standard condition volume flow rate gas Volume flow rate, temperature, and pressure under standard conditions Nm³ Standard flow rate Nm ³/h
Liquid volume flow rate liquid Volume flow rate, temperature m³ Volume flow rate m ³/h
Liquid mass flow rate liquid Mass flow rate, temperature kg or t Mass flow rate kg/h, t/h
Saturated steam temperature compensation Saturated steam Mass flow rate, temperature, density kg or t Mass flow rate kg/h
Saturated steam pressure compensation Saturated steam Mass flow rate, temperature, pressure, density kg or t Mass flow rate kg/h
Saturated steam temperature and pressure compensation Saturated steam Mass flow rate, temperature, pressure, density kg or t Mass flow rate kg/h

● Equipped with 10 non-linear processing functions

● Communication protocol: RS485 communication (Modbus protocol)

Hart protocol optional

RS232 communication is optional

Calibration function: 4 to 20mA calibration

temperature calibration

pressure calibration

● Protection level: IP65

● Electrical interface: 1/2NPT

● Power: max 3 watts

Explosion proof grade: ExdeⅡBT6

ExdeⅡCT6

The relationship between the minimum measurable flow velocity and medium density of vortex flowmeter

flow rate range

DN Liquid flow rate rangem/s Gas flow rate rangem/s Steam flow rate rangem/s
Vmin Vmax Vmin Vmax Vmin Vmax
15 0.5 9 7.9 80 ﹣ 85
20 0.4 9 6.8 80 ﹣ 85
25 0.35 9 5.9 80 5.5 85
32 0.3 9 4.9 80 5.5 85
40 0.3 9 4.9 80 5.5 85
50 0.3 9 4.9 80 3.9 85
65 0.3 9 4.9 80 3.9 85
80 0.3 9 4.9 80 3.9 85
100 0.3 9 4.9 80 3.9 85
125 0.3 9 4.9 80 3.9 85
150 0.3 9 4.9 80 3.9 85
200 0.35 9 5.9 80 4.4 85
250 0.4 9 6.9 80 ﹣ 85
300 0.4 9 6.9 80 ﹣ 85
medium Calculation basis Physical parameters
liquid water Density 1000kg/m ³
gas air Density 1.29kg/m ³
high temperature gas steam 0.7Mpa, 170 ℃, density 4.1kg/m3

Converter function

FV-D
power supply DC16V TO 36V
display LCDliquid crystal
4-20mA √
pulse √
High and low alarm √
RS485 √
HART Optional
RS232 Optional
FV-D
mass flow √
Volume flow rate √
Standard flow rate √
density √
temperature √
pressure √
nonlinear correction √
Signal Processing Spectrum analysis and adaptive filtering technology

Converter menu structure

Converter output wiring

be careful:

1. Pulse output, analog current output, and power isolation

2. Pulse output with pull-up resistor, NPN mode, active output

3. The current output is an active output with 24VDC built-in

4. The driving capability of the high and low alarm circuit is 24VDC, 30mA, which can drive relays, valves, and alarm lights

INSTALLATION REQUIREMENTS

The above diagram shows the installation of straight pipe sections before and after the flowmeter;

The following table shows the required data for the straight pipe section of the flowmeter;

Flow meter inlet pipeline The minimum length of straight pipe required for proper operation
Upstream straight pipe section requires mm Downstream straight pipe section requires mm
Single 90 degree elbow 20 Dia 12 Dia
Tee 20 Dia 12 Dia
RDCR / EXPNDR 20 Dia 12 Dia
Two 90 degree elbows on the same plane 30 Dia 17 Dia
Fully open butterfly valve or ball valve 30 Dia 17 Dia
Two 90’s Out of Plane 40 Dia 22 Dia
control valve 50 Dia 27 Dia
P.R.V 50 Dia 27 Dia

The following figure shows the installation requirements for flow meters in high-temperature environments.

The following diagram shows the correct installation of the flowmeter on the pipeline.

Outline parameter diagram of clamping type and flange type

DN L(mm) H(mm) D(mm)
Clamping type Flange type Clamping type Flange type Clamping type Flange type
DN15 70 180 335 240 15 15
DN20 70 180 335 240 20 20
DN25 70 200 335 240 25 25
DN40 70 200 335 247 40 40
DN50 80 200 335 252 50 50
DN65 80 200 345 260 65 65
DN80 100 200 355 262 80 80
DN100 120 235 365 280 100 100
DN125 140 270 382 290 125 125
DN150 160 300 395 305 150 150
DN200 360 332 200
DN250 400 355 250
DN300 400 380 300

Outline parameter diagram of flange type

FV10-F flange type external dimensions (DIN PN16 and ANSI Class150 and Class300)

Size (mm) Between flanges L (mm) Outer diameter of flange D (mm) Height H (mm)
PN16 Class 150 Class300 PN16 class150 class300 PN16 Class150 Class300
15 160.6 160.6 169.6 95 89 95 156 153 156
20 169.6 169.6 179.3 105 99 117 161 157 167
25 176.2 176.2 189 115 108 124 166 162 170
32 179.3 179.3 195 140 117 133 178 166 175
40 204 204 216.6 150 127 155 178 166 178
50 207 207 219.7 165 152 165 187 180 187
65 219.7 219.7 232.4 185 178 191 197 193 199
80 239.7 239.7 258.5 200 191 210 220 215 225
100 277.4 277.4 296.6 220 229 254 250 254 267
125 302.8 302.8 322 250 254 279 295 297 310
150 342.8 342.8 362 285 279 318 313 310 330
200 301.6 301.6 311.2 340 343 381 370 371 391
250 433.2 433.2 464.6 405 406 445 428 428 447
300 478.6 478.6 510 460 483 521 480 491 510

FV10-F flange type external dimensions (DIN PN25 and JIS10K and JIS20K)

Size (mm) Between flanges L (mm) Outer diameter of flange D (mm) Height H (mm)
PN25 JIS 10K JIS 20K PN25 JIS10K JIS20K PN25 JIS10K JIS20K
15 127 127 133 95 95 95 156 156 156
20 129 129 137 105 100 100 161 158 158
25 137 137 141 115 125 125 166 171 171
32 141 141 147 140 135 135 178 176 176
40 156 156 162 150 140 140 178 173 176
50 160 160 164 165 155 155 187 182 182
65 168 168 176 185 175 175 197 192 192
80 190 190 202 200 185 200 220 213 220
100 215 215 243 235 210 225 258 245 253
125 219 219 253 270 250 270 305 295 205
150 271 271 311 300 280 305 320 310 323
200 316 316 354 360 330 350 380 365 375
250 360 360 404 425 400 430 438 425 440
300 386 386 438 485 445 480 493 473 490

Insertion type external parameter diagram

Model Selection Table

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