Selection Guide for Vortex Flowmeters

    Vortex flowmeters, as a commonly used flow measurement instrument, have wide applications in the industrial field. The following is a detailed analysis of the advantages and disadvantages of vortex flowmeters and a selection guide:

Advantages

   Wide measurement range: Vortex flowmeters have a large range ratio, usually up to 1:10 or higher (some special devices can reach 1:35), which can meet the measurement requirements of different flow ranges.

High accuracy: Vortex flowmeters have high accuracy when measuring volumetric flow under working conditions, with relative deviations typically between ±1% and ±1.5%, and their measurements are basically unaffected by parameters such as fluid density, pressure, temperature, and viscosity.

Low pressure loss: The design of vortex flowmeters results in relatively small pressure loss during measurement, which helps reduce system operating costs and has certain energy-saving effects.

Simple and robust structure: Vortex flowmeters have no moving parts, a simple and robust structure, and are highly reliable for long-term operation.

Convenient maintenance: Due to the simple structure of vortex flowmeters and the fact that the sensor does not directly contact the measured medium, they are relatively easy to maintain.

Diverse signal output: Vortex flowmeters have both analog standard signal output and digital pulse signal output, which is convenient for use with digital systems such as computers to achieve automatic control and remote monitoring.

Wide application range: Vortex flowmeters can be used to measure the flow of various media such as gases, liquids, and steam, and have a wide range of applications.

High reliability: Vortex flowmeters use piezoelectric stress sensors and have high reliability, and can operate normally within a working temperature range of -20°C to +250°C (some models can reach even higher temperatures).

Disadvantages

   Poor vibration resistance: Vortex flowmeters are sensitive to vibration, and external vibration may cause measurement errors or even prevent normal operation. This issue is more pronounced in large pipe diameters. Although there are models with better vibration resistance available, this problem still needs to be noted during use.

High requirements for straight pipe sections: To ensure measurement accuracy, vortex flowmeters typically require a straight pipe section of 40D before and 20D after (D is the pipe diameter), which to some extent limits their application in certain complex piping systems. 

LUGB Series Temperature and Pressure Compensated Integrated Vortex Flowmeter

Poor adaptability to dirty media: The vortex flowmeter's generating body is prone to being contaminated by the medium or entangled by impurities, which can affect measurement accuracy. When measuring fluids containing impurities, regular cleaning and maintenance are required.

Not suitable for large pipe diameters: Vortex flowmeters are generally not suitable for pipes with diameters larger than DN300mm (some insert types can handle larger diameters), as the flow coefficient is relatively small at this point, which may affect measurement accuracy. However, this issue can be mitigated to some extent by choosing an appropriate installation method (such as insert type) and reducing the pipe diameter.

Selection Guide

    Determine the measured medium: Select the appropriate vortex flowmeter model based on the nature of the medium (such as gas, liquid, steam, etc.) and its state (such as temperature, pressure, viscosity, etc.). For high-temperature, high-pressure, or corrosive media, choose a flowmeter that is resistant to high temperatures, high pressures, or corrosion.

Determine the flow range: Select the appropriate vortex flowmeter model and specification based on the actual flow range to ensure measurement accuracy and reliability. It is generally recommended to keep the common flow within the upper-middle part of the measurable range.

Consider pipe size: Choose the appropriate vortex flowmeter based on the inner diameter of the pipe to ensure measurement accuracy and stability. For large pipe diameters, consider using an insert type vortex flowmeter.

Consider environmental conditions: Select the appropriate vortex flowmeter model and specification based on the working environment conditions (such as temperature, humidity, electromagnetic interference, etc.). For locations with vibration sources, choose a model with better anti-vibration performance.

Consider signal output requirements: Select the appropriate vortex flowmeter model based on the signal output requirements. If it needs to be used with digital systems such as computers, choose a model with digital pulse signal output.

Consider maintenance and upkeep: Choose a vortex flowmeter model that is easy to maintain and service to reduce later maintenance costs and improve equipment reliability.

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