channel of flow rate measuring and micro processing unit, LCD driver circuit and other support circuit, and is equipped with output signal interface.
4. Temperature pickup
With Pt100 platinum resistor as its sense organ, and with a certain range of temperature, resistance quantity shares correspondence relation with the temperature.
5. Pressure sensor
With Piezoresistive diffused dilicon connection circuit as its sense organ, its bridge arm resistance will make contemplated change under outer pressure, so under effect of certain energizing current, potential difference at both output terminal share a direct proportion with outer pressure.
6. Piezoelectricity crystal probe
It is installed at the laryngeal part of the dilating section of the shell and can detect frequency signal of eddy movement.
7. Swirl reducer
It is fixed at exit section of the shell to reduce whirling current and thus reduce compact on the performance of instruments of lower reaches.
Operating principles
Flow through section plane of flow sensor is similar to shaped conductor of venturi pipes (Figure 2).
Fix a helical guide vane at entrance side, when the fluid enters the flow sensor, the guide vane will force the fluid form fierce vortex. When the fluid enters the dilating section, the vortex will begin the second rotation under influence of reflux and will form gyro vortex precession. Frequency of the precession shares a direct proportion with flow rate, free from influence of the fluid's physical nature and density, therefore, precession frequency of the second rotation acquired by detecting element can obtain good linearity in a large scale of flow rate. Signals will be enlarged, filtered by the preamplifier and will change into pulse signal which shares a direct proportion with flow speed, then the signals will be sent to micro processing unit to be integrated together with detection signals of the temperature and pressure, finally, the measuring result will be displayed on the liquid crystal display (instantaneous delivery, integrated flux and temperature and pressure data).
Operating Principles of Flow Totalizer
Flow Totalizer is composed by temperature and pressure detection analog channel, flow sensor channel and micro processing unit, and is equipped with output signal interface, from which various signals are output. Micro processing unit of the flow Totalizer conducts temperature and pressure compensation due to the ideal gas law and automatically revises compressibility factor, the ideal gas law is as follow:
.........(2)
In this formula:
QN: Flow volume in standard condition (m3/h);
QV: Flow volume in operating condition (m3/h);
Pa: Local atmospheric pressure (KPa);
P: Psig measured by pressure port of the flow totalizer (KPa);
PN: Atmospheric pressure in standard condition (101.325 KPa);
TN: Absolute temperature in standard condition (293.15K);
T: Absolute temperature of the measured fluid (K);
ZN: Air compression coefficient in standard condition;
Z: Air compression coefficient in operating condition;
Notes: when phosphorizer used and the subpressure is certain, ZN/Z=1, for natural gas, (ZN/Z)1/2=FZ is super compressibility factor. It is calculated according to formula of China National Petroleum Corp. standard.
Main Technical Parameters and Functions
3.1 Standards of Flow Totalizer, Basic Parameters and Performance Index (Table 1)
(Table 1)
Intelligent Vortex Flow Meter Gas Flow Meter ammonia gas flow meter
A.[Features of Vortex Flow Meter]
Various medium of Vortex Flow Meter
The flow meter could test liquid,gas and steam.
Professional flow meter for steam
Beacuse of the high temperature,the Stainless Steel And Longer Warranty Period cng mass Flowmeter Vortex Flow Meter with temperature and pressyre consumption.The highest temperature is 250ºC
Various power supply for you reference
The power supply is 12~24VDC and battery supply,but the battery flow meter can not provide any output;
Widely flow range and large flow ratio
The diameter is from DN15 to DN1000 (DN200~1000 insert type)
Srable signal and performance
Achieve vibration immunity with a mass balanced sensor and Adaptive Digital Signal Processing with visual filtering.
B.[Parameter]
| Production Name |
Stainless Steel And Longer Warranty Period cng mass Flowmeter Vortex Flow Meter |
| Diameter |
15,20,25,32,40,50,65,80,100,150,250,300,(300~1000) |
| Pressure |
DN15~DN200(4.0Mpa) DN250~DN300(1.6Mpa) |
| Temperature |
Piezoelectric:-40~60ºC Capacitive:-40~300ºC |
| Material |
Stainless steel material |
| Vibration acceleration |
Piezoelectric:0.2g Capacitive:1.0~2.0g |
| Accuracy |
1.0%FS;1.5%FS; Insert type:2.5%FS |
| Flow ratio |
1:6~1:30 |
| Power supply |
Flow sensor:12VDC/24VDC ;Transmitter:12 24 VDC Battery:3.6V |
| Output |
Pulse or 4~20mA Output ;battery supply can not provide any output |
| Pressure loss |
Standard:Cd≤2.4 |
| Explosion |
Exd2 CT2T~5T GE or Exd2 CT2~CT5 |
| Protection |
IP65 or IP68 |
| Medium |
Gas;liquid or steam |
| Distance |
Three wires pulse output≤3000mm;Two wires current output(4~20mA) |
C.[Installation]
1.Requirement of Environment
Avoid the Electrical equipment,high frequency equipment,pls keep supply away other power supply.
Avoid the high temperature emvironment,If can't,pls take Insulated and ventilated measures.
Avoid the high temperature and corrosive gas.
Pls installa the Stainless Steel And Longer Warranty Period cng mass Flowmeter Vortex Flow Meter on the pipe without any shock.
The Stainless Steel And Longer Warranty Period cng mass Flowmeter Vortex Flow Meter should be installaed indoor,if installa at oudoor,pls notice the water.
Pls ensure the Plenty of space to checking and service.
2.Requirement of pipeline
Pls confirm the requirement of straight pipe front and behind the Stainless Steel And Longer Warranty Period cng mass Flowmeter Vortex Flow Meter to avoid effecting the error and performance
Note:
The adjusted value can not installa at upsteam,should installa it at 10DN downsteam ;
The pipe of uposteam and downsteam must have same diameter,
The gasket between of flow meter and flange,The inside diameter should big than inside diameter of flowmeter 1~2mm.
If you need installa the temperature and pressure sensor,the hole of temperature at 3~5DN,The hole of pressure at 6~8DN;
The Stainless Steel And Longer Warranty Period cng mass Flowmeter Vortex Flow Meter could installa at horizontal ,vertical and tilt state;
For gas,installa at vertical pipe,the flow direction Unrestricted,if the pipe with little liquid,the flow should from bottom to up.
D.[Company info]
Our Company is Top 10 Manufacture on Alibaba;
We have about 30 years of experience in Manufacture;
Our products have been exported to more 100 coutries and area;
ISO,SGS,CE and more ceterficates for you reference;
Patent technology and more than 3 years working life |
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Notes: 1. Accuracy rating: system accuracy after temperature and pressure are revised;
2. A and B are used to distinguish different flow range of the same latus rectum.
Standard condition:
P=101.325KPa,T=293.15K
Conditions of usage:
Environment temperature: between-30 degree centigrade and 65 degree centigrade
Relative humidity: between 5 percent and 95 percent
Medium temperature: between -20 degree centigrade and 80 degree centigrade
Atmospheric pressure: between 86KPa and 106KPa
Audited Supplier 
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