Yokogawa VY Series Vortex Flowmeter

Product Overview

The Yokogawa VY Series Vortex Flowmeter stands at the forefront of industrial process measurement, delivering exceptional accuracy and long-term stability for monitoring diverse fluid types. Designed to meet the rigorous demands of modern industrial automation, this digital gas flowmeter and liquid monitoring device integrates cutting-edge frequency output technology with a rugged mechanical structure. Whether deployed in chemical processing plants, power generation, or general utility networks, this industrial vortex meter ensures precise data acquisition and seamless system integration.

Core Technology & Measurement Principle

Operating on the principle of Karman vortex shedding, the Yokogawa VY vortex flowmeter measures the frequency of vortices generated behind a precision-engineered shedder bar. With no internal moving parts, this obstructionless design completely eliminates pressure drops and significantly reduces maintenance requirements. The device features an intuitive local indicator equipped with high-visibility displays, alarm icons, and interactive setting switches, enabling engineers to monitor process variables and configure parameters safely.

Communication & System Flexibility

Equipped with versatile communication protocols—including HART protocol, FOUNDATION Fieldbus, and Modbus communication types—the VY series flow meter offers flexible integration into existing control room architectures. It supports active 4 to 20 mA analog outputs, pulse outputs, status alarms, and auxiliary analog inputs, ensuring comprehensive feedback for complex control loops. Furthermore, data backup and restoration are fully supported via pre-amplifier data storage, enhancing operational efficiency during maintenance.

Rugged Build & Safety Standards

Built to withstand harsh industrial environments, the flowmeter complies with strict international EMC standards and offers waterproof construction options (IP66/IP67 / Type 4X). The meter incorporates rigorous grounding options, lightning protection capabilities (option code /A), and robust temperature ranges, ensuring maximum structural integrity and safety in demanding outdoor or indoor installations.

Application Fields

• Chemical & Petrochemical Processing: Ensures stable, high-precision flow monitoring for corrosive and high-temperature chemical media within industrial piping networks.

• Power & Steam Generation: Accurately measures superheated and saturated steam flows to optimize thermal energy efficiency and boiler performance.

• Water & Wastewater Management: Delivers reliable continuous flow measurement for municipal and industrial water distribution and effluent treatment.

• Industrial Manufacturing & Process Automation: Integrates seamlessly with DCS and PLC architectures via HART, Fieldbus, or Modbus for real-time liquid, gas, and steam tracking.

Technical Specifications

• Applicable Fluids: Liquid, Gas, and Steam

• Size Range: 15 mm to 400 mm (0.5 in. to 16 in.)

• Communication Protocols: HART (HART 7), FOUNDATION Fieldbus, and Modbus (RS-485)

• Power Supply Voltage:

  • HART Type: 10.5 to 42 V DC (10.5 to 30 V DC with lightning protector)

  • Fieldbus / Modbus Type: 9 to 32 V DC / 9 to 30 V DC

• Output Signals: 4 to 20 mA DC analog output, pulse output (80 mA DC max), and status/alarm contacts

• Enclosure Protection: IP66 / IP67 (IEC 60529) and NEMA Type 4X

• Ambient Temperature Range: -29°C to 85°C (Standard type); options available down to -50°C (/LAT)

FAQ

• Q: Can the VY Series flowmeter measure multi-phase flows such as gas-liquid mixtures?

  • A: No. While the flowmeter handles liquid, gas, and steam independently within the same structure, accurate measurement of mixed multi-phase flows (such as bubble or mist flows) is not possible.

• Q: How is zero adjustment performed if the meter outputs a signal during zero flow?

  • A: Although zero drift is minimal due to the frequency output sensor, you can perform manual low-cut adjustments or execute “Tuning at zero” (Zero Tuning) via the configuration tool or indicator when the fluid flow is completely stopped.

• Q: What should be checked if the indication drops to zero while fluid is flowing?

  • A: Check for potential coating or scaling on the vortex shedder bar or inner tube, verify that parameter configurations match operating conditions, and ensure the low-cut or TLA values are correctly set.

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