LUGB Flange Connected Vortex Flow Meter from China Manufacturer

Introduction Features Specifications Model Selection Application Installation

Introduction

Vortex steam flowmeter is one of the main flowmeter products, widely used in petroleum, chemical industry, metallurgy, heating and other departments. Test and measure the flow of liquid, gas and steam.

The LUGB vortex flow sensor is based on the theory of Karman and Strohal about the generation of vortices and the relationship between vortices and flow to measure the flow of steam, gas and low viscosity liquid. A triangular column is inserted vertically into the surface body, that is, the generating body of the vortex. When there is a medium flowing through the surface body, a regular Karman vortex in the opposite direction is alternately generated behind the triangular column, and the separation frequency F of the vortex is proportional to the flow velocity V of the medium. By detecting the number of vortices through the sensing head, the fluid velocity can be calculated, and then the volume flow of the measured medium can be calculated according to the surface diameter.

Features

The surface body is formed by one-time precision casting, which effectively avoids product leakage and other problems caused by welding technology.

The probe is built-in, non-human factors caused by the problem, the service life of the probe can reach 5 to 10 years.

Using DSP full digital circuit, can be more effective anti-vibration, signal is more stable, range ratio is wider.

The probe adopts four piezoelectric crystals, which can effectively reduce the resonance and reduce the interference of small signals.

Body material is made of 304 stainless steel.

The structure is simple and firm, no moving parts, high reliability, long-term operation is very reliable.

The pressure loss is small, the operation cost is low, and the energy saving is more significant.

In a certain range of Reynolds number, the output signal frequency is not affected by the physical properties of the fluid and the composition of the change, the instrument coefficient is only related to the shape and size of the vortex generating body, the measurement of fluid volume flow without compensation, after the replacement of accessories generally do not need to re-calibrate the instrument coefficient.

Wide application range, steam (saturated steam), gas (compressed air, oxygen, nitrogen, gas, natural gas, hydrogen, liquefied petroleum gas, hydrogen peroxide, flue gas, methane, butane, chlorine, methane, etc.), liquid (water, high temperature water, oil, food liquid, chemical liquid, etc.) can be measured.

Specifications

Measuring medium	Liquid, gas, saturated steam, superheated steam
Accuracy	Liquid ±1.0%, gas (steam) ±1.5%, plug-in ±2.5%
Working pressure	1.6MPa，2.5MPa，4.0MPa，6.4MPa
Medium temperature	Ordinary type -40 ~ 150℃ Medium temperature type -40 ~ 250℃ High temperature type -40 ~ 350℃
Output signal	Three-wire voltage pulse, low level 0 ~ 1V, high level > 4V, duty cycle 50%; Two-wire system standard current 4 ~ 20mA; Three-wire system standard current 0 ~ 10mA
Working environment	-35℃～+60℃，Humidity ≤95%RH
Working power supply	DC12V；DC24V
Material	Carbon steel, stainless steel
Explosion-proof type	Intrinsically safe ExibIICT6

Model Selection

Measuring medium: Vortex flowmeter is a speed flowmeter, its principle, determines its measuring medium type, can be liquid, can also be gas or steam. At present, the vast majority of industrial occasions, such as nitrogen, compressed air, steam, heat conduction oil, etc., mostly use flange connected vortex flowmeter to measure;

Pipe diameter: Flange connected vortex flowmeter can be divided into pipe type and insert type installation according to the different installation methods. For the pipeline type, the pipe diameter is the same as most other flowmeters, the small is DN15, and the large is able to reach DN300. If you need a larger caliber, you can choose to insert the installation, the conventional caliber range can reach DN2000, DN2000 caliber above supply in accordance with the agreement;

Measurement accuracy: The accuracy of the flange connected vortex flowmeter also has several grades, and it is divided according to the measurement medium. If it is to measure liquid, the measurement accuracy can reach 1.0, and if it is to measure gas, the accuracy can reach 1.5. If it is inserted vortex flowmeter, the accuracy can reach level 1.5 and 2.5;

Medium temperature: Generally speaking, it is divided into three ranges, which are divided into normal temperature, medium and high temperature. The temperature range is -40 ~ 100℃(normal temperature), 100 ~ 250℃(medium temperature), 100 ~ 320℃(high temperature). If the field medium temperature is higher, such as some superheated steam, you can use the orifice flowmeter to measure;

Nominal pressure: mainly divided according to the installation method, the main demand on the market is as follows: for example, flange clamp type (2.5MPa), flange connection type (1.0/1.6/2.5MPa), plug-in installation type (1.6MPa/2.5MPa/4.0MPa);

Power supply: According to the current market demand, there are mainly +12VDC(three-wire pulse output), +24VDC(three-wire pulse output type and two-wire current output type)3.6V lithium battery, dual power supply

Output signal: According to the current market demand, the main voltage frequency pulse output, two-wire system 4-20mA output and HART output. In addition, some occasions may require digital output, we can also provide modbus RS485 communication.

Application

Industrial process

Energy measurement

Environmental protection engineering

Transportation

Biotechnology

Scientific experiment

Marine meteorology

Rivers and lakes

Installation

1、The special flange and the straight pipe section cannot be welded with the sensor;

2、When installing, the flow direction of the sensor should be consistent with the flow direction of the fluid in the pipeline;

3、Before installing the sensor, the sealing ring must be placed in the flange groove. The pressure and temperature measuring points are located at 3 ~ 5DN downstream of the sensor, and the temperature measuring points are located at 5 ~ 8DN downstream.

4、When measuring high temperature media, do not use insulation material to wrap around the sensor connection rod;

5、The direction of the shielded cable connecting the sensor should be as far away from the interference of strong electromagnetic fields as possible. * It is not allowed to be laid together with high-voltage cables, the shielded cables should be as short as possible, and should not be coiled to reduce the distributed inductance, and the length should not exceed 200 meters;

6、The pipe must be cleaned before installing the sensor. Flush out the impurities in the tube to avoid clogging the sensor after the flow. The pipe for measuring the liquid must be filled with the liquid being measured to prevent interference from bubbles.

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