AI.VFM Series

Product catalog summary

Introduction
The AI.VFM series Vortex Flow Meter operates on the Karman vortex street principle, where swirls generated by a bluff body in the pipe are proportional to the volumetric flow. It is widely used for measuring gases, steam, and liquids, particularly in large facilities for steam production efficiency.

Principle
When fluid passes a bluff body, vortices are generated, known as Karman vortices. The frequency of these vortices depends on the size of the triangular prism and the flow rate, independent of medium parameters like temperature and pressure. Key formulas include:

F = sR*v (1-1.27*d/D)
Q = 3600*F/K
M = Q*P

Where F is the vortex frequency, Sr is the Strouhal number, v is the flow rate, d is the width of the triangle prism, D is the meter diameter, Q is the volume flow rate, K is the meter coefficient, M is the quality flow rate, and P is fluid density.

Applications
The meter is applicable in various industries, including chemicals, petrochemicals, power generation, and heat-supply systems, handling fluids like steam, compressed air, nitrogen, and more.

Features
The Vortex Flow Meter includes integrated pressure and temperature compensation, selectable outputs (4-20mA, pulse with HART or RS485), a wide temperature range up to 350℃, and a fully welded SS304 body. It has no moving parts, reducing wear and maintenance.

Connection Types
Available connection types include flange, thread, wafer, tri-clamp, and insertion, with options for compact and remote types.

Display and Circuitry
The device features a large LCD display with backlight for easy observation and debugging, and a digital circuit board with anti-vibration and anti-interference capabilities.

Flow Range and Parameters
Tables provide flow ranges for liquids, air, and steam, as well as density and relative temperature and pressure for superheated steam.

Dimensions
Dimensions are provided for different connection types, including flange, wafer, and insertion.

Installation and Model Selection
Guidelines for installation and model selection are included, ensuring proper setup and operation.

Catalog excerpts

VORTEX FLOW METER AI.VFM Series

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AI.VFM works on the Karman vortex street principle that swirls generated by a bluff body in the pipe. The number of swirls are proportional to the volumetric flow in the pipe. Vortex flowmeter widely used for gases, steam and liquid applications. It is ideal for measuring saturated and superheated steam in large facilities to improve steam production efficiency. When the fluid in the pipeline passes the bluff body (triangular prism), vortices will be generated due to the acceleration of partial flow rate. The vortices will arise alternatively in two lines, which is called Karman vortex. The releasing...

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Integrated pressure and temperature compensation 4-20mA, pulse with HART or pulse with RS485 are selectable Wide temperature range up to highest temperature 350℃ Embedded sensor, 4 piezo-electric crystal encapsulated inside the sensor. No moving parts, no abrasion, non-wearing parts inside, fully welded SS304 body (SS316 selectable) TYPE OF CONNECTION FLANGE TYPE THREAD TYPE WITH COMPENSATION TYPE WAFER TYPE TRI-CLAMP TYPE INSERTION TIPE COMPACT AND REMOTE TYPE Compact Type Remote Type 1) Remote converter Type (standard cable 10m, max cable 20m) Tel.: +39 011 198 218 39 - E-mail: [email protected]...

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LOW POWER CONSUPTION LCD DISPLAY Big LCD Display with back light is easy to debug and observe -•Instantaneous Flow • Total Flow ■* Frequency, Density, Temperature, Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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Measured Medium Liquid, Gas, Steam Communication RS485 Modbus or HART Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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Table 1 Liquid and Air Flow Range Table (m3/h) Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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Table 2 Saturated Steam Mass Flow Range Table (kg/h) Le caratteristiche dichiarate possono cambiare senza alcun preavviso 7

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Table 2 Saturated Steam Mass Flow Range Table (kg/h) Le caratteristiche dichiarate possono cambiare senza alcun preavviso 8

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Table 3 Superheated Steam Density & Relative Temperature and Pressure (Kg/m3) Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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Flange Connection Type Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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Wafer Connection Type Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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Insertion Type VORTEX FLOW METER INSTALLATION Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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MODEL SELECTION AI.VFM Size Tel.: +39 011 198 218 39 - E-mail: [email protected] - www.asit-ge.com Le caratteristiche dichiarate possono cambiare senza alcun preavviso

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