Newsletter
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一、Product introduction
The digital YEWFLO vortex flowmeter combines the field proven sensor and body assembly used in more than 400,000 units installed worldwide with a unique and powerful combination of digital technology that includesspectral signal processing (SSP), a Yokogawa innovation. The digitalYEWFLO vortex flowmeter is accurate and stable, even in harsh process conditions, and has a highly reliable and robust design that delivers improvements in plant efficiency and reduced operating costs
二、Features
- New functions with Spectral Signal Processing (SSP) technology
SSP analyses the fluid conditions inside the digitalYEWFLO vortex flowmeter and uses the data to automatically select the optimum adjustment for the application, providing features never seen before in a vortex flowmeter.
SSP accurately senses vortices in the low flow range, providing outstanding flow stability.
- Advanced self-diagnostics
Application conditions such as high pipeline vibration and abnormal flow are predicted and indicated.
- High accuracy
±0.75% of reading (liquid)
±1.0% of reading (gas, steam)
- Wide process temperature range
High temperature version up to 450 deg C
Cryogenic version minimum -196 deg C
- Simple parameter settings
Frequently-used selections grouped together in a quick-access format decrease commissioning time
- Clear, concise indicator
Convenient display of the simultaneous and total flow rates together with the process diagnosis
- Dual output for analog/pulse
Simultaneous output for flow rate and pulse
- Alarm output
An alarm signal is output when an alarm occurs.
- BRAIN/HART communication and key switches for human-machine interface
- NACE compliant
- NAMUR 43 compliant
- Remote cable length up to 30m
三、Specifications
| Standard Type | Reduced Bore Type | Multi-Variable Type | ||
| Model |
Model DY Vortex Flowmeter (Integral Type, Remote Type) Model DYA Vortex Flow Converter (Remote Type) (Option for High Process Temperature Version: /HT, Option for Cryogenic Version: /LT) |
Option: /R1, /R2 1 size down: /R1 2 size down: /R2 (Option for High Process Temperature Version: /HT) |
Option: /MV | |
| Fluid to be Measured | Liquid, Gas, Steam (Avoid Multiphase Flow and Sticky Fluids) | |||
| Nominal Size | Wafer | 15 to 100 mm | N/A | 25 to 100 mm |
| Flange | 15 to 400 mm |
R1: 25 to 200 mm (Detector: 15 to 150 mm) R2: 40 to 200 mm (Detector: 15 to 100 mm) |
25 to 200 mm (Special: 250 to 300 mm) |
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| Accuracy | Liquid |
±0.75% of Reading (Depends on Reynolds number) |
±1.0% of Reading (Depends on Reynolds number) |
±0.75% of Reading (Depends on Reynolds number) |
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Gas Steam |
±1.0% of Reading (Depends on flow velocity) |
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| Output Signal |
Dual Output (Both analog and pulse output available) Communication: HART 5/HART 7, BRAIN, FOUNDATION™ fieldbus |
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| Process Temperature |
-29 to 250 deg C -29 to 450 deg C (/HT) -196 to 100 deg C (/LT) |
-29 to 250 deg C -29 to 450 deg C (/HT) |
-29 to 250 deg C -29 to 400 deg C (/HT) |
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| Process Pressure | -0.1MPa (-1kg/cm2) to flange rating | |||
| Ambient Temperature | -29 to 85 deg C (Depends on model type) | |||
| Ambient Humidity | 5 to 100% RH (No Condensation) | |||
| Mounting |
Flange or Wafer Type JIS 10/20/40K ANSI 150/300/600/900 (Special: 1500) DIN PN 10/16/25/40/ 60/100/160 |
Flange Type only JIS 10/20K ANSI 150/300 |
Flange or Wafer Type JIS 10/20/40K ANSI 150/300/600/ 900 DIN PN 10/16/25/40 |
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| Electrical Connection | JIS G1/2 Female, ANSI 1/2NPT Female, ISO M20×1.5 Female | |||
| Explosion Protected Type |
TIIS Ex d, FM Ex d/Ex ia, ATEX Ex d/Ex ia, CSA Ex d/Ex ia, IECEx Ex d, SAA Ex ia |
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| Material |
Body: Stainless steel(Special: Hastelloy, Carbon steel) Shedder Bar: Duplex stainless steel(Option: Stainless steel, Hastelloy) Gasket: Stainless steel with Teflon coating (/HT: with Silver plating) Converter housing, case and cover: Aluminum alloy(Option: Stainless steel) |
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