YOKOGAWA Digital YEWFLO Vortex Flowmeter With FOUNDATION Fieldbus

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

Product Introduction

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.

Key Features

Multi-Fluid Compatibility: Measures flow rates of liquids, gases, saturated steam, and superheated steam (avoids multi-phase or adhesive fluids), adapting to diverse industrial processes.

SSP Technology: Yokogawa’s exclusive Spectral Signal Processing enhances vibration resistance and enables advanced self-diagnosis, ensuring reliable measurements in dynamic environments.

No Moving Parts: Simple, robust structure with no moving components reduces wear and maintenance needs, improving durability and longevity.

Zero Adjustment Not Required: Sensor detects frequency directly, with zero output at zero flow, eliminating the need for manual zero calibration.

Broad Communication Support: Compatible with FOUNDATION Fieldbus, HART 7/5, and BRAIN protocols, facilitating real-time data transmission and remote control.

Explosion Protection: Certified for multiple explosion protection standards (TIIS Ex d, FM Ex d/Ex ia, ATEX Ex db/Ex ia, CSA Ex d/Ex ia, IECEx Ex db/Ex ia), ensuring safety in hazardous areas.

Reduced Bore Type Enhancements

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.

Specifications

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).

Applications

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.