Do you need a reliable, cost-effective way to measure steam, gas, or liquid flow without the moving parts that wear out? For over 50 years, Yokogawa's vortex flowmeters—known globally as the YEWFLO series—have set the standard for durability and precision. With over 500,000 units sold, this proven technology now enters its next generation: the Vortex Flowmeter VY Series. Combining a unique, robust shedder bar design with advanced digital signal processing (SSP), the VY series delivers accurate, stable measurement across a wide range of temperatures and process conditions, from cryogenic services to superheated steam.

Why Choose Yokogawa Vortex Flowmeters? Solving Noise, Stability & Application Challenges

Achieve reliable flow data with intelligent features that directly address common industrial pain points.

• Eliminate Errors from Process Noise and Vibration: Pipeline vibration and flow turbulence can create noise that masks the true vortex signal. The VY Series vortex flowmeter incorporates Yokogawa's proprietary digital signal processing technology (SSP) . This intelligent filtering automatically distinguishes between the Von Karman vortex frequency (the signal you want) and process noise (the signal you don't), ensuring rock-solid stability even in challenging pipework, as proven through decades of YEWFLO evolution.

• Unmatched Reliability with a Proven Sensor Design: The heart of the YEWFLO vortex flowmeter is its simple, robust structure with no moving parts. The vortex shedder bar is designed to generate strong, stable vortices, and the piezoelectric sensor is sealed and protected. This inherently reliable design, refined since 1979, minimizes maintenance and provides the long-term stability needed for critical applications like saturated steam monitoring, with temperature capability from -196°C to 450°C.

• Comprehensive Diagnostics for Predictive Maintenance: Don't just measure flow; monitor the health of your instrument. The VY series offers overall diagnostics and condition-based maintenance alerts, enabled by its digital core. Using tools like the FSA130 Verification Tool, you can perform health checks, ensuring your vortex shedding flowmeter is operating correctly and giving you confidence in your data, which is essential for custody transfer and energy balance calculations.

• Versatile Configurations for Diverse Needs: One meter cannot fit every application. The VY series offers a wide range of specialized models to meet your exact requirements, all inheriting the core YEWFLO technology:

• Built-in Temperature Sensor Type: Calculate saturated steam mass flow with a single instrument.

• High Temperature / Cryogenic Type: For extreme process conditions.

• Reduced Bore Type: For low-flow applications, improving accuracy at reduced velocities.

• High Pressure Type: For demanding high-pressure pipelines.

• Dual-Sensor Type: For enhanced redundancy and reliability.

Key Features for Demanding Industrial Applications

Engineered for longevity, precision, and seamless integration:

• Proven Measurement Principle: Utilizes the Von Karman effect, where the frequency of vortices shed from a blunt body (shedder bar) is directly proportional to flow velocity. This frequency is detected by a piezoelectric sensor, providing a linear output independent of fluid properties like density, pressure, and temperature for volumetric flow.

• Exceptional Rangeability: Wide turndown ratio suitable for varying flow rates.

• Robust Construction: No moving parts means minimal wear and tear, resulting in exceptional long-term reliability and low maintenance.

• In-Situ Verification: Compatible with FSA130 tool for comprehensive diagnostics, reporting, and data management, integrating seamlessly with Yokogawa's FieldMate.

• Wide Range of Sizes and Connections: Available in sizes from 15 mm to 400 mm with wafer or flange connections, including specialized reduced bore options to optimize low-flow measurement.

Technical Specifications at a Glance

Measurement Principle & Performance

• Technology: Vortex Shedding (Von Karman Effect)

• Sensor Type: Piezoelectric crystal (sealed, no moving parts)

• Signal Processing: Proprietary digital SSP (Spectral Signal Processing) for superior noise immunity

• Measurable Fluids: Liquids, Gases, Saturated Steam, Superheated Steam

• (Note: Not suitable for multiphase flow, sticky, or highly corrosive fluids)

• Accuracy (of reading):

• Liquids: ±0.75%

• Gas & Steam: ±1.0%

• Fluid Temperature Range: -196°C to 450°C (depends on shedder bar material and type)

• Line Sizes (Connection Size):

• Wafer: 15 to 100 mm

• Flange (General Type): 15 to 400 mm

• Reduced Bore Type (1 size reduction): 25 to 200 mm

• Reduced Bore Type (2 size reduction): 40 to 200 mm

• High Pressure Reduced Bore: 25 to 150 mm

• Dual-Sensor Type: 15 to 200 mm

Model Series & Specializations (VY Series)

Diagnostics & Verification

• Onboard Diagnostics: Overall device health monitoring and condition-based maintenance alerts via SSP.

• External Verification Tool: FSA130 (License key for FieldMate) provides comprehensive:

• Health Check

• Reporting and Data Management

• Compatible with VY Series (HART) and ADMAG TI Series

Communication & Integration

• Protocols: HART 7 (standard), FOUNDATION Fieldbus, PROFIBUS PA, etc. (depending on model/option)

• Configuration: Can be configured via local display or using tools like FieldMate.

Ready to Achieve Reliable, Maintenance-Free Flow Measurement for Steam and Gases?

Whether you are monitoring saturated steam for boiler efficiency, measuring compressed air, or handling cryogenic liquids, the VY Series offers the proven reliability and advanced diagnostics you need.