Product overview
LUGB series pipeline vortex flowmeter is composed of vortex generator, detection probe and corresponding electronic circuit. When the fluid flows through the vortex generator, two alternate rows of vortices are formed on both sides of the vortex generator, which is called Karman vortex street. On the basis of Karman vortex street theory, Strouhal proposed that the frequency of Karman vortex street is directly proportional to the flow velocity of fluid, and gave the relationship between frequency and flow velocity: < br / >
　　　　　　　 f=St× V/d

Where: < br / >
F vortex street frequency (Hz) < br / >
The average velocity (M / s) on both sides of V vortex generator is < br / > 0
St steharol coefficient (constant) < br / >
These alternating vortices form a series of alternating negative pressure, which acts on the detection probe to form a series of alternating electrical signals. After being converted, shaped and amplified by the preamplifier, the pulse frequency signal (or standard signal) in direct proportion to the vortex synchronization is output.
 
Product features
No moving parts, long-term stability, simple structure, easy to install and maintain;
The output of the sensor is pulse frequency, which is linear with the actual flow rate of the measured fluid. The zero point has no drift, the performance is very stable, and the structure is various, including pipeline and plug-in flow sensors;
Generally, the measurement accuracy of liquid is & plusmn; 1.0%； The measurement accuracy of gas is & plusmn; 1.5%;
The measurement range is wide, when the Reynolds number is 2 & times; 104 ～7× In the range of 1:106, it can reach 1:20;
The pressure loss is small (about 1 / 4 ~ 1 / 2 of the orifice flowmeter), which is an energy-saving flow meter;
The installation method is flexible, according to the site process pipeline is blocked, it can be installed horizontally, vertically and at different angles;
The anti-interference circuit and anti vibration sensor head are used, which has a certain anti environmental vibration performance;
Using ultra-low power consumption single chip microcomputer technology, a 3v10ah lithium battery can be used for more than 5 years;
The nonlinearity of the instrument coefficient is corrected by software to improve the measurement accuracy;
EPROM is used to protect the accumulated flow from power failure for more than 10 years;
 
technical parameter
Executive Standard & nbsp;
  Vortex flowmeter (jjg1029-2007)
Gauge diameter (mm) & nbsp;
  15、20、25、32、40、50、65、80、100、125、150、200、250、300
Nominal pressure (MPA) & nbsp;
  1.6Mpa, 2.5MPa, 4.0Mpa (others can be customized)
Accuracy level & nbsp;
  Liquid: & plusmn; 1%

Gas or steam: & plusmn; 1.5%、± 1%
Range ratio & nbsp;
  1:10； 1:15； 1:20
Sensor material & nbsp;
  304 stainless steel, 316 (L) stainless steel, etc
Conditions of use & nbsp;
  Medium temperature: - 40 ℃ ~ + 250 ℃, - 40 ℃ ~ + 320 ℃ & nbsp< br />
  Ambient temperature: - 20 ℃ ~ + 60 ℃ & nbsp< br />
  Relative humidity: 5% - 95% < br / >
  Atmospheric pressure: 86kpa ～ 106kpa
Signal output function & nbsp;
  Pulse signal, 4 ~ 20mA signal
Communication output function & nbsp;
  RS485 communication output, HART protocol, etc
Working power supply & nbsp;
  External power supply: 34vdc & plusmn; 15%, Ripple & le& plusmn; 5%, suitable for 4 ~ 20mA output, pulse output, RS485 communication output, etc
  Internal power supply: 1 set of 3.1v10ah lithium battery, which can work normally when the battery voltage is 2.0V ~ 3.0V
Signal line interface & nbsp;
  Basic type: Hausman connector or self-contained three core cable; Explosion proof type: internal thread M20 & times; one.5
Explosion proof grade & nbsp;
  Exiaiict5 or exdiibt6
Protection level & nbsp;
  IP65 or higher (customizable)
 
measuring range
Gas measurement range
Gauge diameter & nbsp< br />
（mm）
V-shaped measurement range & nbsp< br />
（m3/h）
DN15
5-30（6:1）
DN20
6-60（10:1）
DN25
7-70（10:1）
DN32
8-160（20:1）
DN40
18-360（20:1）
DN50
25-500（20:1）
DN65
40-800（20:1）
DN80
50-1000（20:1）
DN100
80-1600（20:1）
DN125
150-3000（20:1）
DN150
180-3600（20:1）
DN200
350-7000（20:1）
 
The measurement range of saturated steam flow takes steam pressure 1.0MPa as an example
Gauge diameter & nbsp< br />
（mm）
V-shaped measurement range & nbsp< br />
（kg/h）
DN15
25.8-154.8（6:1）
DN20
30.96-309.6（10:1）
DN25
36.12-361.2（10:1）
DN32
41.28-825.6（20:1）
DN40
92.88-1857.6（20:1）
DN50
129-2580（20:1）
DN65
206.4-4128（20:1）
DN80
258-5160（20:1）
DN100
412.8-8256（20:1）
DN125
774-15480（20:1）
DN150
928.8-18576（20:1）
DN200
1806-36120（20:1）
 
Product classification
Product picture


Instrument model
LUGB-N
LUGB-D
signal output
pulse
Optional 4-20mA / pulse
Power supply
+24VDC± 15%
24VDC± 15% + lithium battery
Accuracy class
Liquid: grade 1.0 & nbsp< br />
Gas or steam: class 1.5-1.0
Liquid: grade 1.0 & nbsp< br />
Gas or steam: 1.5-1.5Grade 1.0
measuring range
Standard range
Standard range or extended range
monitor
nothing
yes
Temperature and pressure compensation
nothing
yes
communication interface
nothing
RS485
Real time recording
nothing
yes
Instrument material
304 or 316L stainless steel
304 or 316L stainless steel
Explosion proof grade
Exdiibt6 or ExiaIICT4
Exdiibt6 or ExiaIICT4
Protection level
IP65
IP65
Overall power consumption
< 1W
< 1W
Instrument thoroughfare
DN15～DN300
DN15～DN300
Installation method
Flange installation
Flange installation
Medium temperature
-40 ℃ ~ 250 ℃ or & nbsp< br />
-40℃～350℃
-40 ℃ ~ 250 ℃ or & nbsp< br />
-40℃～350℃
ambient temperature
-20℃～60℃
-20℃～60℃
 
On site cases




Application in food factory
Application in brewery
Installation in Hotel
Application in Industrial Park