LUGB Flange Clamped Vortex Flowmeter from China Manufacturer

Introduction Features Specifications Model Selection Application Installation

Introduction

LUGB flange clamped vortex street steam flowmeter is a commonly used structure, its body itself does not have a connection flange, in connection with the pipe, the flowmeter clamped between two special flanges, and then bolted. It is characterized by small size and simple and compact structure. At the same time, special flanges and fastening bolts are provided, so the installation cost is low and the installation is very convenient.

Vortex flowmeter is a new flowmeter developed on the basis of Karman vortex principle. Because it has the advantages that other flowmeters can not be combined, since the 1970s has been rapid development, according to the data in the close, now Japan, Europe and the United States and other developed countries use the proportion of vortex flowmeter has risen significantly, has been widely used in various fields. It will occupy a leading position in the future flow meters and is an ideal alternative to orifice flowmeters. Vortex flowmeters are suitable for measuring the mass flow and volume flow of superheated steam, saturated steam, compressed air, general gas, water and liquid.

The company produced LUGB vortex flowmeter, there are remote transmission type, field display type, temperature and pressure automatic compensation type. Can be widely used in chemical, petroleum, metallurgy, light industry, environmental protection, municipal, electric power and other departments.

Features

Easy to install and easy to maintain;

Simple and firm structure, no moving parts, long-term operation is very reliable;

Wide range, range ratio up to 1:15;

Small pressure loss, low operating cost, more energy saving significance;

Wide range of applications, liquid, gas, steam can be measured;

The verification cycle is long, generally two years;

In a certain range of Reynolds number, the output signal is not affected by the change of physical properties and components of the measured medium, the instrument coefficient is only related to the shape and size of the vortex generator, and it is generally not necessary to re-calibrate the instrument coefficient after replacing the parts.

It can be displayed on the spot, can also be transmitted remotely, and can also be networked with the computer control system;

The detection probe does not directly contact the measured medium, and the performance is more stable.

Specifications

Performance	Technical parameter
Measuring medium	Steam, compressed air, liquid (single phase media)
Medium temperature	-40℃～+350℃
Medium pressure	1.6、2.5、4.0Mpa
Range ratio	1：8～1-30(air at reference scale) 1：8～1：40(Refer to normal temperature water)
Measuring range	Liquid 0.4 ~ 0.7m/s Gas 4.0 ~ 60m/s Steam 5.0 ~ 70m/s
Specification	DN25～DN300mm
Material	304, 316L a variety of materials
Reynolds number	Normal 2 x 104Cd to 7 x 106
Drag coefficient	Cd≤2.6
Vibration acceleration	LUGB type≤0.2g
Class of protection	IP65
Explosion-proof class	（ia) II CT6
Accuracy	Level 1.0, level 1.5
Environmental condition	Ambient temperature	-40℃～+55℃(non-explosion-proof place) -20℃～+55℃(explosion-proof place)
	Relative humidity	≤85%
	Atmospheric pressure	86～106Kpa
Power supply	Non-explosion-proof type	Pulse type	+12VDC 20mA
		current type	+24VDC 20mA
Output signal	Frequency pulse signal 2 ~ 3000Hz Low level ≤1V High level ≥6V
	Two-wire 4-20mA signal (isolated output) load ≤500Ω

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、When using a vortex flowmeter to measure steam, the body and pipe must be insulated, the flange must be clamped, and there must be no air leakage, otherwise the instrument is easy to damage;

2、It is better to install the instrument indoors, away from vibration and strong electromagnetic interference. If outdoors, the watch head can be protected;

3、The instrument should have 10-15 times the straight pipe section, and then have more than 5 times the straight pipe section. Select the installation place to facilitate installation, wiring and debugging;

4、For a straight pipe section, weld the two flanges before installation, then install the instrument and clamp it, cut off the equal length straight pipe, and then install the whole table welded before. Never weld the watch on the flange.

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