digitalYEWFLO Vortex Flowmeter

Specifications / Functions

Refer to the General Specification sheet located under the Downloads tab for detailed specifications.

digitalYEWFLO Vortex flowmeter Reduced Bore Type is a vortex flowmeter in which the main body of the vortex flowmeter and the reducer (reduction pipe and expansion pipe) are integrated into a casting.
Suitable for lines with large fluctuations in flow rate depending on the season, such as steam supply lines.
Since the reducer and the vortex flowmeter are integrated, it is not necessary to prepare a reducer and a short pipe for securing the straight pipe length.
This not only simplifies installation and reduces costs, but also improves safety by reducing the number of connection points.

Realize Simple Instrumentation

As an example of a vortex flowmeter application, a reducer may be used to measure low flow.
In this case, as shown in the figure below, it is necessary not only to connect the reduction pipe and the expansion pipe, but also to connect short pipes to secure the straight pipe length upstream and downstream respectively. As a result, not only is the installation process complicated and difficult, but also the installation cost increases. Furthermore, with six connections, the risk of fluid leakage increases.
The Reduced Bore Type has a concentric reducer. Therefore, there is no need to install not only the reduction pipe and the expansion pipe, but also the short pipe for securing the straight pipe length.
Furthermore, the reduced number of connections brings reducing the risk of fluid leakage and installation costs.
The measurement lower limit value is expanded by 2 to 3 times, and a low flow rate can be measured with a pipe diameter size flowmeter.

The line that used to change the two orifice plates according to the amount of flow fluctuation has no need to be changed by installing the Reduced Bore Type.
For lines that require yearly or long-term flow control, there is no need to stop the line when making changes. In addition to the high-temperature and high-pressure fluid that Vortex Flowmeter is originally good at, the vibration resistance and self-diagnosis function using the SSP function unique to digitalYEWFLO Vortex Flowmeter, the quality of flow control is upgraded using various functions.

Two Lineups

The Reduced Bore Type is available in two reducer specifications (/R1 and /R2) so that it can be used depending on the application.
The nominal diameter of the detection part is reduced by 1 size down for /R1 and 2 sizes down for /R2 compared to the nominal diameter of flange piping.
The relationship between the nominal diameter of the flange piping and the nominal diameter of the detector is shown below.

The Reduced Bore Type contributes to stable flow measurement at low flow rates that are difficult to measure with standard types.
An example of the measurable flow rate range is shown below for the standard type and two reducer specifications.In the standard type, the measurable flow rate range is 74 to 1,876 kg/h, which is ideal when the flow rate range to be measured is wide.
If you want to measure a low flow below 74 kg/h, the Reduced bore type R2 is suitable.
In addition, if you want to measure flow as wide as standard type as well as low flow rate area under 74 kg/h, Reduced bore type R1 specification is suitable.

Combination with Multi-Variable Type Possible

The Reduced Bore Type can be combined with the Multi-Variable Type.
The combination with the Multi-Variable Type enables temperature measurement and temperature correction for low flow rate.
Even at low flow rates, the mass flow rate of saturated steam can be directly output with one unit.

Combination with High Temperature Version Is Possible

The Reduced Bore Type can be combined with high temperature version.
The combination with high temperature version extends the upper limit of applicable fluid temperature from the usual 250 °C to 450 °C.
Even at low flow rates, it is possible to measure the flow rate of high temperature fluid.

Durability

Durability through simple design and construction.

digitalYEWFLO Vortex Flowmeter Multi-Variable Type is a flowmeter most suitable for steam applications, with a built-in resistance temperature sensor (Pt1000) in a solid shedder bar (vortex generator).
Analog and pulse signals can be output simultaneously, and while displaying the flow rate on the display, it is also possible to display the fluid temperature as a temperature monitor function. It contributes to the total cost reduction and energy saving of the line using steam as the heat medium.

 

RTD Built into the Shedder Bar (Vortex Generator)

Temperature Display Function

The built-in thermometer inside the shedder bar allows simultaneous display of instantaneous flow and fluid temperature.

Mass Flow Calculation Function

The Multi-Variable Type has a built-in steam table, so it can automatically calculate and directly output the mass flow rate of saturated steam from the measured fluid temperature. Furthermore, with FOUNDATION Fieldbus communication type, Arithmetic (AR) function block expands the mass flow calculation function for the saturated steam, superheated steam, gases and natural gas by using external pressure/temperature input (/MV: internal temperature input) with a high accuracy. In combination with FSA120 Flow Navigator software brings to the high accurate mass flow calculation output using AGA No. 8 temperature correction calculation of natural gas or using physical property database (DIPPR) for general gas, natural gas, and liquids.

Mechanism of Saturated Steam Density Calculation

The Multi-Variable Type has the saturated steam curve that is a curve that represents the saturation point of the steam. The mass flow rate is calculated by calculating the density based on the measured fluid temperature and the saturated steam curve.
This is why digitalYEWFLO vortex flowmeters can perform mass flow calculations by tracking changes in fluid temperature. In the case of superheated steam, the density is calculated from the steam table with the pressure kept constant.
Using the integration function, the energy consumption of steam can be recorded at regular intervals, so it can be used as a material for energy saving improvement plans.

Combination with High Temperature Is Possible

The Multi-Variable Type can be used in combination with High Process Temperature Version.
The combination with the High Process Temperature Version extends the upper limit of applicable fluid temperature, usually from 250 °C up to 400 °C.

Model Code			DY025 to DY100: Wafer Type DY025 to DY200: Flange Type
Option Code			/MV	/HT/MV
Function	Temperature Indication / Output	Temperature Range	-29 to 250 °C	-29 to 400 °C
	Saturated Steam Mass Flow Rate	Calculation Temperature Range	100 to 250 °C	100 to 330 °C
	Superheated Steam Mass Flow Rate		100 to 250 °C	100 to 400 °C
	Gas Volume Flow Rate		-29 to 250 °C	-29 to 400 °C
	Liquid Mass Flow Rate		-29 to 250 °C	-29 to 400 °C

 

Combination with Reduced Bore Type Possible

The Multi-Variable Type can be combined with the Reduced Bore Type.
The combination with the Reduced Bore Type enables temperature measurement and temperature correction even at low flow rates.

Durability

Durability through simple design and construction.

Specifications / Functions

Refer to the General Specification sheet located under the Downloads tab for detailed specifications.

Model		DY type vortex flowmeter (Integral type, remote type detector) DYA type remote type converter
Specification		Optional specifications: /MV
Measurement Fluid		Liquid, gas, saturated steam, superheated steam (avoid multi-phase flow and adhesive fluid)
Process Temperature		-29 to 250 °C
Process Pressure		-0.1 MPa to flange rating
Diameter	Wafer	25 ～ 100 mm
	Flange	25 to 200 mm (custom specification: 250 to 400 mm)
Accuracy	Liquid	± 0.75 % of reading (depends on Reynolds number)
	Gas, Steam	± 1.0 % of reading (depends on the flow velocity)
Output Signal		Analog output, transistor contact output (simultaneous output possible)
Communication Type		HART 7 / HART 5, BRAIN, FOUNDATION fieldbus
Explosion Protected Type		TIIS Ex d, FM Ex d / Ex ia, ATEX Ex db / Ex ia, CSA Ex d / Ex ia, IECEx Ex db / Ex ia

 

digitalYEWFLO Vortex Flowmeters High Process Temperature Version can be measured up to 450 °C, Cryogenic Version can be measured down to -196 °C.

 

Ideal for Measuring High Temperature Steam, Liquid Nitrogen, Etc.

Supports a wide range of fluid temperatures compared to the standard types. It has the same face-to-face dimension as the standard type, so replacement is easy. It is a simple structure that is easy to keep warm and cool.

Combination with Multi-Variable Type Possible (High Process Temperature Version Only)

For the High Process Temperature Version, combination with the Multi-Variable Type is possible.
The combination with multiple variable type allows temperature measurement and correction up to 400 °C.

Model Code			DY025 to DY100: Wafer Type DY025 to DY200: Flange Type
Option Code			/MV	/HT/MV
Function	Temperature Indication / Output	Temperature Range	-29 to 250 °C	-29 to 400 °C
	Saturated Steam Mass Flow Rate	Calculation Temperature Range	100 to 250 °C	100 to 330 °C
	Superheated Steam Mass Flow Rate		100 to 250 °C	100 to 400 °C
	Gas Volume Flow Rate		-29 to 250 °C	-29 to 400 °C
	Liquid Mass Flow Rate		-29 to 250 °C	-29 to 400 °C

 

Combination with Reduced Bore Type Possible (High Process Temperature Version Only)

For the High Process Temperature Version, combination with the Reduced Bore Type is possible.
In combination with the Reduced Bore Type, flow measurement can be performed up to 450 °C even in the low flow.

 

Durability

Durability through simple design and construction.

Specifications / Functions

Refer to the General Specification sheet located under the Downloads tab for detailed specifications.

Model		DY type vortex flowmeter (remote type detector)
Specification		Optional specification 　High Process Temperature Version: /HT 　Cryogenic Version: /LT
Measurement Fluid		Liquid, gas, saturated steam, superheated steam (avoid multi-phase flow and adhesive fluid)
Process Temperature		-29 to 450 °C（ /HT ） -196 to 100 °C（ /LT ）
Process Pressure		-0.1 MPa to flange rating
Diameter	Wafer	15 to 100 mm
	Flange	15 to 400 mm
Accuracy	Liquid	± 0.75 % of reading (depends on Reynolds number)
	Gas, Steam	± 1.0 % of reading (depends on the flow velocity)
Output Signal		Analog output, transistor contact output (simultaneous output possible)
Communication Type		HART 7 / HART 5, BRAIN, FOUNDATION fieldbus
Explosion Protected Type		TIIS Ex d, FM Ex d / Ex ia, ATEX Ex db / Ex ia, CSA Ex d / Ex ia, IECEx Ex db / Ex ia

Remote	Remote electronics allows you to locate the indicator away from the process measurement point and to more convent visible area. Remote digitalYEWFLO vortex flowmeters are available in a number of different sizes ranging from 1/2-inch to 16-inch. Available with wafer style or flanged style (ANSI Class 150 to ANSI Class 900). digitalYEWFLO has the size you need. The picture left shows a Stainless Steel housing. The SS housing is available option on all Yokogawa digitalYEWFLO Vortex Flowmeters.
High-Pressure High-Pressure digitalYEWFLO is designed to take your toughest high-pressure steam and water applications. The High-Pressure digitalYEWFLO is available with ANSI 900#, 1500#, and 2500# flange connections. Quality, dependability, and now pressure ratings to 5000 psi!
Dual Sensor	When your application requires the highest safeguards for personnel and process, the digitalYEWFLO dual sensor design offers total redundancy and is available in a broad range of sizes and pressure ratings.
High-Purity High-Purity digitalYEWFLO meets the standards set forth in ASTM G93-6 Level B and ANSI B40.1 Level IV. Electropolished to a 15Ra or better finish and double bagged, the High-Purity digitalYEWFLO accurately measures critical high purity steam, water, and gas applications.