Which is a good Guangzhou digital vortex flowmeter

Which is a good Guangzhou digital vortex flowmeter

principle&structure

'The vortex flowmeter uses the Karman vortex principle 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“Kármán vortex street”, ind/D=0.281When the released vortex is stable, the frequency of Karman vortex street release is related to the velocity of fluid flow and the width of the column, and can be used alone

Using the formula to represent:

'F=St ×V/d

FThe release frequency of the Karman vortex street

St: is the coefficient (known as Strouhal number)

V: for flow velocity

d: Column width

D: Instrument inner diameter

Which is a good Guangzhou digital vortex flowmeter

feature

Integrated liquid, gas or vapor mass flow meter

adoptDSPFully digital vortex street using spectrum analysis technology and adaptive filtering technology

Measurement vibration sensor independent of signal measurement sensor Excellent seismic performance

Excellent low flow rate performance; Ultra wide range ratio17：1

Design of probe with built-in temperature

Design of online replaceable detection pressure measurement

have10Point non-linear correction function

optionalHARTCommunication protocol orRS485Communication（MODBUSAgreement)

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 up to400℃The steam

Electrical isolation between output and power supply, with excellent resistanceGan disturbance energy力

The power supply hasACandDCConvenient for users to choose

Turn off the three-way valve to replace the pressure sensor online with pressure

three-way valve

Accuracy of vortex flowmeter

●Repeatability: Measurement of values±0.1%

●Response time: The response to step changes in input is less than50ms

●Stability: Stability of over one year is measured±0.1%

●The impact of environmental temperature: Beyond 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 is not affected.

●Start time: Starting from zero traffic requires50millisecond

●zuiLarge scale travel 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 steel1.4301(304)Stainless steel1.4435(316L)

Vortex generator: stainless steel1.4301(304)Stainless steel1.4435(316L)Monel alloy

Detector material: stainless steel1.4435(316L)Hastelloy and Monel alloys

Material of connector: stainless steel1.4301(304)(Connected to converter)

●Temperature sensor:PT100Built into 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、900The1500

JIS 10k /JIS 20K

Clamping type（Wafer）

●Pressure loss: calculated according to the formula shown in the figure on the rightzuiHigh pressure loss

●Inlet pressure: When measuring liquid flow rate, the flow meter measures the inlet pressurezuiCalculate according to the calculation formula for low requirements

●Reynolds number:10000＜Re＜700000

Sensor parameters

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

●Shell material: Low copper die cast aluminumNema 4X ,IEC60529 IP66(Standard), customizable stainless steel converter housing

●Power supply:DC 16V to 36V，1AQuick circuit breaker insurance

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

●Pulse output:0～5000HZActive output,NPNMethod, with built-in pull-up resistor, duty cycle50%

●Switch output: high and low alarm, two sets of normally open contacts, with a driving capability of24VDC,30mA,Drive impedance greater than800Ohmic relays, alarm lights, and valves

●Display:LEDLCD,4Line display with backlight; The display digits for instantaneous flow and total amount are9bit

Instantaneous flow unit:m³/hThem³/mThem³/sTheGalTheUSAG/mTheUSAG/sThekg/hThekg/mThekg/sThet/hThet/m

Total unit:m³TheGalTheLThekgThet

Temperature unit:℃

Pressure unit:Mpa

　 Density unit:kg/m³

Frequency unit:HZ

●Algorithm selection:

●belt10Nonlinear processing function of segments

●communication protocolRS485Communication（modbusAgreement);HartProtocol optional;RS232Communication optional

●Calibration function:4 to20mACalibration; Temperature calibration; pressure calibration

●Protection level:IP65

●Electrical interface:1/2NPT

●Power:max 3 watts

●Explosion-proof ratingExdeⅡBT6；ExdeⅡCT6

●belt10Nonlinear processing function of segments

●communication protocol

RS485Communication（modbusAgreement)

HartProtocol optional

RS232Communication optional

●Calibration function:4 to20mAcalibration

temperature calibration

pressure calibration

●Protection level:IP65

●Electrical interface:1/2NPT

●Power:max 3 watts

●Explosion-proof ratingExdeⅡBT6

ExdeⅡCT6

The relationship between low measurable flow velocity and medium density in vortex flowmeter

Keweiler Company mainly engages in natural gas flow meters, sewage flow meters, magnetic flap level meters, compressed air flow meters, steam flow meters, diesel flow meters, vortex flow meters, turbine flow meters, electromagnetic flow meters, elliptical gear flow meters, and metal tube float flow meters; Pressure instruments: pressure gauges, pressure transmitters, differential pressure transmitters, etc; Temperature instruments: thermocouple, thermistor; Liquid level gauges: Magnetic flip plate liquid level gauges, input type liquid level gauges, and other series of products are widely used in industries such as petroleum, power, chemical, metallurgical, pharmaceutical, and tap water. The company's business philosophy is to be innovative, skilled in manufacturing, sincere in service, and achieve a win-win situation for supply and demand. Corporate spirit: pragmatic and innovative,ExcellentYue's work style: quick response and continuous improvement.