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Vortex Flowmeter

Vortex Flowmeter

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Vortex Flowmeter

Product catalog summary

Features and Main Technical Data

Compact structure with no moving parts, ensuring a long lifetime and stability.
Capable of measuring liquid, gas, and steam with a single sensor.
Meter coefficient remains unaffected by changes in temperature, pressure, and viscosity within the specified Reynolds Number range.
Reynolds Number Range: 2x10⁴ to 7x10⁶ for DN25 to DN100, and 4x10⁴ to 7x10⁶ for DN150 to DN300.
Local LCD display for rate and total flow.
Operating pressure range: 1.6 to 32 MPa.
Fluid temperature range: -40°C to +150°C for integral type, -40°C to +300°C for separate type.
Power supply options: 24 Vdc ± 10% or 3.6Vdc inner lithium battery.
Ambient temperature range: -25°C to +60°C.
Relative humidity: 5% to 95%.
Accuracy: 1% for liquids, 1.5% for gas and steam.
Output signal: 4-20mA current (2-wire system) or standard pulse output (3-wire system).
Explosion proof rating: Exd II BT4.

Principle of Operation

The vortex flowmeter operates by placing a drum vertically in a burette, allowing fluid to flow down and form regular vortexes known as the Karman Street. The output frequency of these vortexes is related to fluid velocity and drum diameter, described by the formula: v f = St * d, where St is the Strohar number. The frequency is directly proportional to velocity, allowing for instantaneous flow rate calculation.

Flow Range

Tables provide detailed flow ranges for various diameters (DN) and pressures, with specific values for water and gas. The factory-calibrated fluids are water or air.

Outline Dimensions

Dimensions and weights are provided for wafer and flange connection types, with specific measurements for different DN sizes.

Straight Pipe Requirements

Minimum straight pipe lengths are specified for various connection types to ensure accurate measurements.

Type Description and Ordering Information

The document includes a detailed type description and ordering information, specifying nominal diameter, fluid name, flow rate, fluid temperature, operating pressure, fluid density, and output signal requirements.

Catalog excerpts

PETROSYSTEM Srl 18-01 Via Gaspare Spontini, 29/4 - 00043 Ciampino (Roma) – Italy Tel:+39 06 7932.1621 Fax:+39 06 7932.1160 Email: [email protected] Web: www.petrosystem.it VORTEX FLOWMETER SDVT SERIES Features and main Technical Data ? Compact structure ? No moving parts, Long lifetime ? Long time stability ? Same sensor to measure liquid, gas and steam ? Within the Reynold’s No. Range meter coefficient is not influenced change of temperature, pressure, viscosity and others. ? Reynolds No. Range: 2X104 ~ 7X106 (DN25~DN100) 4X104 ~ 7X106 (DN150~DN300) ? Display : Rate and Total flow Local LCD Display ? Pressure Operating: 1.6~32MPa ? Fluid Temp.: 40°C ~ +150° C (Integral Type) 40°C ~ +300 °C (Separate Type) ? Power Supply 24 Vdc + 10% or 3.6Vdc inner lithium Battery ? Ambient Temp.: -25° C ~ +60 C ? Relative Humidity : 5% ~ 95% ? Atmospheric Pressure:86 ~ 106KPa ? Measured Fluid: Liquid, Gas and Steam ? Accuracy: 1% (For Liquid), 1.5% (For gas and Steam) ? Output Signal : 4~20mA Current (2 Wire System) or Standard Pulse Output (3 wire System) ? Explosion proof: Exd II BT4 Principle Put a drum vertically into a burette and let some fluid flow down along the drum, by two sides of which there formed, intoration, regular vortexes, which is called the Karman Street. Output frequency of the Karman Street is released to fluid velocity and drum diameter, which can be described by following formula: f= S v t * d Where: f = Karman Street Output frequency v = velocity St = Coefficient (called as Strohar number) d = Drum Diameter As the Karman Street output frequency is directly proportional to velocity v, it may work out an instantaneous flow rate by using a tested output frequency of the Karman Street. The Strohar number is a key coefficient for vortex street flow meters. Within the lineal section of the curve, where St=0.17. the output frequency is directly proportional to the flow velocity, so a velocity v is derivable by using a tested frequency f. SDVT serials vortex street flow transducers detect the output frequency by using piezoeletricial elements inside the sensors (probes) to test the stress that is alternatively acted on the elements by vortex.

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PETROSYSTEM Srl 18-01 Via Gaspare Spontini, 29/4 - 00043 Ciampino (Roma) – Italy Tel:+39 06 7932.1621 Fax:+39 06 7932.1160 Email: [email protected] Web: www.petrosystem.it Outline Dimension Wafer Connection Type (See picture 3) Table 3 DN (mm) A F c F D L Weight (kg) 25 189.5 51 25 70 3.2 40 197 73 40 70 4 50 197.5 92 50 75 5.5 80 224.5 127 70 100 9 Flange Connection Type (See picture 4) Table 4 DN (mm) A FD L Weight (kg) 150 246 139 270 33 200 269 186 310 45 250 292 231 370 70 300 315 276 40 100 Picture 3 Picture 4 Note : D-Means the nominal diameter of flowmeter If temperature and/or pressure...

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PETROSYSTEM Srl 18-01 Via Gaspare Spontini, 29/4 - 00043 Ciampino (Roma) – Italy Tel:+39 06 7932.1621 Fax:+39 06 7932.1160 Email: [email protected] Web: www.petrosystem.it Type Description 1 2 3 4 5 6 7 8 Type DN PN Pipe Connection Electricity Shield Output Signal Power Indicator Note SDVT Vortex Flowmeter 02 DN:25 mm 03 DN:32 mm 04 DN:40 mm 05 DN:50 mm 06 DN:65 mm 08 DN:80 mm 10 DN:100 mm 12 DN:125 mm 15 DN:150 mm 20 DN:200 mm 25 DN:250 mm 30 DN:300 mm ZY Liquid ZQ Gas or Steam FL Separate Type for Liquid, Gas or Steam 1 Nominal Pressure: 2.5 MPa 2 Nominal Pressure: 4.0 MPa J Wafer Connection...

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Vortex Flowmeter

Vortex Flowmeter

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