YOKOGAWA Digital YEWFLO Vortex Flowmeter With FOUNDATION Fieldbus

The YOKOGAWA digitalYEWFLO Vortex Flowmeter (Models: DY Vortex Flowmeter, DYA Vortex Flow Converter) with FOUNDATION Fieldbus Communication

The YOKOGAWA digitalYEWFLO Vortex Flowmeter, part of the OpreX Field Instruments family under the OpreX Measurement category, is a high-performance flow measurement solution designed for liquids, gases, and steam. Combining a field-proven sensor and body assembly (with over 450,000 units installed worldwide) with advanced digital technology--including Yokogawa's proprietary Spectral Signal Processing (SSP)--this flowmeter delivers accuracy and stability even in harsh process conditions. Available as integral or remote detector types (DY) and remote converters (DYA), it supports FOUNDATION Fieldbus, HART 7/5, and BRAIN communication protocols, enabling seamless integration into industrial control systems. The lineup also includes a Reduced Bore Type, optimized for low flow rates and simplified installation, making it versatile for applications with varying flow demands.

The Reduced Bore Type integrates the flowmeter with a concentric reducer, offering unique advantages for low-flow and variable-flow applications:

• Simplified Installation: Eliminates the need for separate reducers, expanders, or short pipes for straight pipe length, reducing connection points by up to 70% and lowering leakage risk.
• Extended Low-Flow Measurement: Expands the lower measurement limit by 2-3 times compared to standard types, enabling accurate low-flow detection without downsizing the main pipe.
• Cost and Safety Benefits: Reduces installation costs, minimizes fluid leakage risks, and eliminates the need to stop processes for flow range adjustments (e.g., replacing orifice plates).

Two Reducer Options:

• /R1: Detector bore size reduced by 1 size from the flange piping.
• /R2: Detector bore size reduced by 2 sizes, ideal for ultra-low flow rates.

Compatibility with Special Versions: Can be combined with Multi-Variable Type (for temperature measurement and correction) or High-Temperature Version (process temperature up to 450°C), enhancing versatility.

Process Temperature: Standard Type: -29 to 250°C; High-Temperature Version: up to 450°C.

Process Pressure: -0.1 MPa to flange rating (varies by model).

Diameters:

• Standard Type: Wafer (15-100 mm), Flange (15-400 mm).
• Reduced Bore Type: Flange (25-200 mm) with /R1 or /R2 reducers.

Accuracy:

• Liquids: ±0.75% of reading (depends on Reynolds number).
• Gases/Steam: ±1.0% of reading (depends on flow velocity).

Output Signals: Analog output, transistor contact output (simultaneous output available).

• Standard Type: Ideal for wide flow ranges in boilers, chemical processing, and utility systems.
• Reduced Bore Type: Suitable for steam supply lines, seasonal flow-variable systems, and low-flow processes in textiles, food, and building materials manufacturing.
• Multi-Variable Combination: Enables direct mass flow measurement of saturated steam, even at low flow rates.