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The best from XUNYI |
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LUGB series vortex flowmeter (for saturated steam) |
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Part I: Overview |
1. Product range and scope of application
1. LUGB Man of the series of piezoelectric Vortex Flowmeters
2. LUGB insert series of piezoelectric Vortex Flowmeters
3. LUGE series of full-capacitive Vortex Flowmeters
4. LUGE insert series of capacitive Vortex Flowmeters
5. LUGB / E series of battery-powered type vortex flow meters
LUGB / E-type vortex flow meters wide application in the petroleum, chemical industry, metallurgy, heat, textile, paper making industries of superheated steam, steam, compressed air and general gases (oxygen, nitrogen hydrogen, natural gas, gas, etc.), water And liquid (such as: water, petrol, alcohol, benzene, etc.) the measurement and control. |
2. Principle |
| In the fluid in the vortex of a set of non-streamlined body (fluid resistance), from the vortex of both sides in turn generate two rules of the vortex, this vortex known as the Kaman Vortex Figure (a) below. |
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Spiral out of the vortex in the lower reaches of non-symmetrical arrangement. A vortex for the frequency f, tested medium to flow an average of V, a vortex of Ying-stream surface width of d, for the path of Table D, according to Kaman Vortex principle, the following formula:
f = StV / d formula (1)
Where:
f-in the side of the vortex frequency Carmen
St-˹(non-dimensional.)
V-average velocity of the fluid
d-vortex in the width of
Thus, by measuring the frequency of Carmen vortex can be calculated from the instantaneous flow. Among them, several˹(St) is the dimensionless unknown,
Figure (b) that˹few (St) and the Reynolds number (Re) relationship.
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In the curve of the table St = 0.17 the straight part of the release of the vortex is directly proportional to the frequency and velocity, is the vortex flow sensors measure of the degree. As long as detect frequency f can be obtained on the velocity of the fluid, obtained by the velocity V volume flow. Measured by the number and size of the pulse of the ratio, known as the instrument constant (K), see-(2)
K = N / Q (1/m3) formula (2)
Where: K = constant meter (1 / m3).
N = number of pulses
Q = volume flow (m3)
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3. Major technical indicators |
Nominal Path(mm) |
2540506580100125150200250300(3001000Plug-in) |
Nominal pressure(MPa) |
DN25-DN200 4.0(>4.0Availability agreement)DN250-DN300 1.6(>1.6Availability agreement) |
Medium temperature() |
Piezoelectric-40260-40320Capacitive -40300, -40400-40450Availability agreement |
Bulk material |
1Cr18Ni9Ti(Other material agreements Availability) |
Allow vibration acceleration |
Piezoelectric:0.2g Capacitive:1.02.0g |
Precision |
1%R1.5%R1FSPlug-in2.5%R2.5%FS |
The scope of |
16130 |
Supply voltage |
Sensors+12V DC+24V DCTransmitter+24V DCBattery-powered type3.6VBattery |
Output |
Square wave pulse (not including battery-powered type): HIGH 5 V, low 1 V; Current: 4 ~ 20 mA |
Pressure loss coefficient |
JB/T9249 meet the standards Cd 2.4 |
Explosion signs |
On this type: Exd ia CT2-CT5 Flameproof: Exd CT2-CT5 |
Level of security |
IP65 common type of diving IP68 |
Environmental conditions |
Temperature of -20 ~ 55 , relative humidity of 5 percent to 90 percent, atmospheric pressure of 86 ~ 106 kPa |
Applicable media |
Gas, liquid, steam |
Transmission distance |
Sensors: up to 4 km, two-wire transmitter (4 ~ 20 mA): load resistance 750 |
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Part II: Instrumentation calibre determine the design and installation |
| Instrument selection is very important positions in the dashboard of the work, whether or not the right instrument selection will directly affect whether the instrument to normal operation. Users and design units in the selection of Granville flow product, please read this section, carefully check Fluid process parameters and to keep me company with sales or technical support department to ensure that the correct selection. |
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