Overview

　　The LUGB series vortex flowmeter is a type of flow instrument that uses a piezoelectric crystal as its sensing element, delivering a standard signal proportional to the flow rate. This instrument can be directly paired with instrumentation devices or integrated with computers and distributed control systems, enabling accurate measurement of flow parameters for various media. Based on the principle of detecting fluid-induced vortices, the piezoelectric crystal in this flowmeter remains completely isolated from the measured medium, ensuring features such as simple construction, excellent versatility, and high operational stability.

　　The LUGB series vortex flowmeters are suitable for flow detection and measurement of various gases, liquids, and steam. The LUGB series vortex flowmeters can be used with the company’s own intelligent totalizers, as well as with smart instruments manufactured by other meter vendors, making them highly versatile.

How it works

　　The basic principle of the vortex flowmeter is based on the Karman vortex street phenomenon, which states that "the frequency of vortex shedding is directly proportional to the flow velocity." The diameter of the flowmeter's flow passage body is typically identical to the instrument's nominal bore size. As shown in Figure 1, an approximately isosceles triangular prism is inserted into the flow passage, with its axis perpendicular to the direction of the fluid being measured and its base facing upstream.

Where:

f is the frequency (Hz) of vortex shedding from a cylindrical body;

V— Lateral flow velocity in the column (m/s); d—Width of the column’s upstream face (m); Sr—Strouhal number.

It is a constant that depends on the cross-sectional shape of the cylinder and is largely independent of the fluid properties and flow velocity.

Product Features and Applications

　　1. The sensor measurement probe is encapsulated using a special process, offering standard temperature resistance up to 250°C, with high-temperature versions capable of withstanding up to 350°C.

　　2. The sensing element is encapsulated within the probe body, ensuring the detection component remains isolated from the measured medium, resulting in an extended service life.

　　3. The sensor features a compensation design to enhance the instrument's seismic resistance;

　　4. Simple structure with no moving parts, ensuring high durability;

　　5. Within the specified Reynolds number range, the measurement is unaffected by medium temperature, pressure, or viscosity;

　　6. The flowmeter can be used in explosion-proof environments, offering excellent safety;

　　7. Wide measurement range, up to 10:1;

　　8. Highly versatile, capable of measuring both impure gases and liquids;

　　9. This instrument is widely applicable for measuring the flow of various media—including water and wastewater in large, medium, and small pipelines, industrial circulation systems, sewage treatment processes, as well as oils, chemical reagents, compressed air, saturated and superheated steam, natural gas, and more.

Technical specifications

Selection of models

Example: For measuring steam using a Flange-mounted, explosion-proof vortex flowmeter with a DN50 pipeline, where on-site display of flow rate and remote transmission of a current signal are required, the product model should be: LUGB-2305CE

Typical flow range for liquids and gases

Factory display

Honor Show

Exhibition style