Yokogawa’s digitalYEWFLO Multivariable Vortex Flow Meter can measure flow rate and temperature simultaneously, eliminating the need for separate components and associated installation costs. The embedded temperature sensor inside the shedder bar directly outputs the mass flow rate of saturated steam and computes the flow rate in real time based on the measured temperature.
Our multivariable vortex flow meter features:
- Embedded temperature sensor
- Built-in steam tables
- Self-diagnostics functions
- Simultaneous displays of mass flow rate and temperature on two-line LCD indicator
Details
Features
Embedded Temperature Sensor
With the digitalYEWFLO multivariable type vortex flow meter, there is no need for an external temperature sensor or the insertion hole in a pipe. An embedded Pt1000 RTD sensor extends the application of digitalYEWFLO to include the mass flow of saturated steam, gas, and liquids.
Built-in Steam Tables
Built-in steam tables provide temperature references for pressure based on the saturated steam conditions. With these steam tables, the measured temperature defines the steam pressure, and the temperature and pressure define the steam density. The mass flow rate is calculated by combining the steam density and volumetric flow rate.
With its Spectral Signal Processing system, the digitalYEWFLO is able to accurately measure fluctuations in temperature.
Advanced Self-Diagnostics
The LCD indicator provides messages to alert the operator if the temperature is outside the set range or if there is a temperature sensor fault, so necessary actions can be taken to prevent inaccurate measurements.
Simultaneous Displays of Mass Flow Rate and Temperature
The multivariable vortex flow meter displays mass flow rate and temperature on the two-line LCD indicator, providing simultaneous outputs for temperature monitoring and mass flow measurement. The LCD indicator also features user-selectable flow, temperature, total and other display parameters.
Durability
See General Specifications documents below for digitalYEWFLOW vortex flow meter dimensions and other detailed specifications.
Applications
Steam Flow Measurement
Steam has often been described as the 'lifeblood' of the industry. The multivariable vortex flow meter is the perfect solution for steam flow measurement due to its embedded temperature sensor, built-in steam tables, inherent linear measurement, large turndown, low pressure drop, and high accuracy. The multivariable vortex flow meter eliminates the need for separate components and associated installation temperature elements. In addition, it provides quality, dependability and high pressure ratings along with a stable and reliable flow measurement.
Vortex Flow Meter Working Principle: How Multivariable Flow Meters Work
Saturated Steam Measurement Mechanism
A steam table provides data on the temperature, pressure and density of steam and is provided by a certification body such as ASME (American Society of Mechanical Engineers). The saturated steam curve shows the steam saturation point for each pressure/temperature level. The digitalYEWFLO converter calculates the mass flow rate using the density figure from the steam table. With its Spectral Signal Processing system, the digitalYEWFLO is able to accurately measure fluctuations in temperature. With superheated steam, density is calculated as a fixed pressure value that includes the superheated temperature value.
Resources
Yokogawa's digitalYEWFLO Reduced Bore Type Vortex Flow meter features a cast stainless steel body and a concentric reducer and expander that enable stable flow rate measurements in low-flow conditions. This expands the range of measurements that can be performed, from the higher flow rates down to the lower end of the flow span, which is normally difficult for Vortex Flow meters, and ensures stable and accurate flow rate output.
Vortex flow meters utilize a fluid phenomenon in which frequencies of Karman vortex streets released from a shedder bar inserted in a flow are proportional to flow velocities.
Progress in digital signal processing and network technologies has enabled advanced functions which cannot be achieved by traditional field devices with 4-20 mA signal, to be implemented on field devices. Standardization of international fieldbus specifications, notably the FOUNDATION™ Fieldbus, has enabled users to build optimum field networks comprised of freely chosen field devices from various device vendors.
Vortex flow meters have been appreciated by users as volume flow meters, which can, in principle, be applied to any flow measurement of liquid, gas, or steam. Volume flow measurement is enough for substances with small variations in density such as liquid.
Downloads
Brochures
- digitalYEWFLO Vortex Flowmeter Multivariable type (387 KB)
- Vortex Flowmeter digitalYEWFLO Series - Total Insight - (5.9 MB)
- Beneficial operation of Oxygen supply measurement for reaction vessel by digitalYEWFLO Multivariable type! (3.7 MB)
- Digital YEWFLO Vortex Flow Meters (429 KB)
- Brochure: Five Mistakes When Selecting a Flowmeter
Instruction Manuals
- digitalYEWFLO Series Vortex Flowmeter Installation Manual (6.0 MB)
- Manual Change: digitalYEWFLO Series Vortex Flowmeter: No. 18-0020-E (283 KB)
- digitalYEWFLO Series Vortex Flowmeter FOUNDATION Fieldbus communication type (4.4 MB)
- digitalYEWFLO BRAIN Communications Programming (677 KB)
- digitalYEWFLO Series Vortex Flowmeter FOUNDATION Fieldbus communication type (4.4 MB)
- digitalYEWFLO HART Communications Programming Pocket Guide (782 KB)
- Vortex Flow Meter Auto-Tuning Feature (15 KB)
- Yewflo Brain Communicating Vortex Flow Meter (60 KB)
- Yewflo HART Communicating Vortex Flow Meter Pocket Guide (95 KB)
General Specifications
Software
- Yokogawa DTM FOUNDATION Fieldbus
- Fieldbus DD/CF file - digitalYEWFLO Vortex Flowmeter
- Fieldbus DD/CF file - digitalYEWFLO Vortex Flowmeter with software download function
- Fieldbus Device Description (DD) and Capabilities File (CF) (95 KB)
- Fieldbus Device Description (DD) and Capabilities File (CF) (354 KB)
- Fieldbus Device Description (DD) and Capabilities File (CF) (123 KB)
- Digital YEWFLO Sizing Program 9.04 (13.6 MB)
Engineering Tools
- digitalYEWFLO Vortex Flowmeter Integral / Remote , Wafer [DY015, DY025, DY040, DY050, DY080, DY100] (684 KB)
- digitalYEWFLO Vortex Flowmeter Integral / Remote , Flange [DY015, DY025, DY040, DY050, DY080, DY100] (677 KB)
- digitalYEWFLO Vortex Flowmeter Integral / Remote , Flange [DY150, DY200, DY250, DY300, DY400] (674 KB)
- digitalYEWFLO Vortex Flowmeter High Temp. (/HT) and Cryogenic (/LT) Remote , Wafer [DY015,DY025,DY040,DY050,DY80,DY100] (639 KB)
- digitalYEWFLO Vortex Flowmeter High Temp. (/HT) and Cryogenic (/LT) Remote , Flange [DY015,DY025,DY040,DY050,DY80,DY100] (645 KB)
- digitalYEWFLO Vortex Flowmeter High Temp. (/HT) Remote , Flange [DY150, DY200, DY250, DY300, DY400] (651 KB)
- digitalYEWFLO Vortex Flowmeter High Temp. (/HT) , Reduced Bore (/R1) Remote , Flange [DY040, DY050, DY080] (630 KB)
- digitalYEWFLO Vortex Flowmeter High Temp. (/HT) , Reduced Bore (/R1) Remote , Flange [DY100, DY150] (629 KB)
- digitalYEWFLO Vortex Flowmeter Reduced Bore (/R1) Integral / Remote , Flange [DY025, DY040, DY050] (671 KB)
- digitalYEWFLO Vortex Flowmeter High Temp. (/HT) , Reduced Bore (/R1) Remote , Flange [DY200] (627 KB)
- digitalYEWFLO Vortex Flowmeter High Temp. (/HT) , Reduced Bore (/R2) Remote , Flange [DY040, DY050, DY080, DY100, DY150, DY200] (631 KB)
- digitalYEWFLO Vortex Flowmeter Reduced Bore (/R1) Integral / Remote , Flange [DY080, DY100, DY150] (671 KB)
- digitalYEWFLO Vortex Flowmeter Reduced Bore (/R1) Integral / Remote , Flange [DY200] (668 KB)
- digitalYEWFLO Vortex Flowmeter Reduced Bore (/R2) Integral / Remote , Flange [DY040, DY050, DY080, DY100, DY150, DY200] (672 KB)
- digitalYEWFLO Vortex Flowmeter SS Housing (/E1) Remote, Wafer [DY015, DY025, DY040, DY050, DY080, DY100] (623 KB)
- digitalYEWFLO Vortex Flowmeter SS Housing (/E1) Remote, Flange [DY015, DY025, DY040, DY050, DY080, DY100] (631 KB)
- digitalYEWFLO Vortex Flowmeter SS Housing (/E1) Remote, Flange [DY150, DY200, DY250, DY300, DY400] (629 KB)
- digitalYEWFLO Vortex Flowmeter SS Housing (/E1) , Reduced Bore (/R1) Remote, Flange [DY025, DY040, DY050, DY080, DY100, DY150] (619 KB)
- digitalYEWFLO Vortex Flowmeter SS Housing (/E1) , Reduced Bore (/R1) Remote, Flange [DY200] (619 KB)
- digitalYEWFLO Vortex Flowmeter SS Housing (/E1) , Reduced Bore (/R2) Remote, Flange [DY040, DY050, DY080, DY100, DY150, DY200] (620 KB)
- digitalYEWFLO Series Vortex Flowmeter High Pressure Type (BA6, CA6) Integral/Remote, Flange [DY025, DY040, DY050] (628 KB)
- digitalYEWFLO Series Vortex Flowmeter High Pressure Type (BA6, CA6), Stainless Steel Housing (/E1), Remote, Flange (567 KB)
- digitalYEWFLO Vortex Flowmeter Remote Type Vortex Flow Converter [DYA] (688 KB)
- digitalYEWFLO Vortex Flowmeter Flameproof Packing Adapter [/G11, /G12] (548 KB)
- digitalYEWFLO Vortex Flowmeter Remote Type Signal Cable [DYC] (629 KB)
2D/3D Configurator
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