| Customization: | Available |
|---|---|
| After-sales Service: | Video Mode |
| Warranty: | One Year |
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An overview of the
Bar-type flowmeter is a new type of plug-in flow measuring instrument designed and produced by using the working principle of differential pressure. It is composed of an integrated bar-type sensor, differential pressure transmitter and integrator, etc. The flow measuring system can also be networked with the control system or computer for fluid flow measurement and control. The latest research results of Walibar flow sensor are reflected centrally by bar-type sensors. The shape of the sensor is like a bullet, in line with the principle of fluid dynamics, can produce accurate and stable differential pressure signal, high strength, no leakage, anti-blocking. It has the advantages of high measurement accuracy, reliability and stability. Can measure gas, liquid, steam and corrosive media and other fluids, suitable for various sizes of pipe, used in high temperature and high pressure occasions.
Performance and Features
1, the non-recoverable pressure loss of the bar-type flow sensor is very small, generally about 2% of the output differential pressure. Therefore, the operating cost caused by pressure loss is tens of one of the orifice plate.
2, the flow sensor is widely used, can measure single-phase fluid (including liquid, gas and steam, etc.) flow. Diameters can range from 25mm to several meters. The larger the pipe diameter, the more prominent its advantages. The upper limit of temperature can reach 500ºC and the upper limit of pressure can reach 25MPa.
3. The flow coefficient of the bar-type flow sensor has good long-term stability. According to a large number of our experimental data, the basic error of the large caliber bar-type flow sensor can reach 1.5% on the industrial pipeline, and the small and medium-sized caliber bar-type flow sensor can reach 1%. Its long-term stability can reach 0.5%.
4, simple structure, light weight. General barb sensor only a dozen parts, a barb flow sensor for Dg1000mm pipeline, weight is only a few kilograms.
5, easy to install, the bar-type flow sensor is similar to the thermocouple insertion type flow meter, installation is very convenient, compared with the commonly used orifge-plate flowmeter in the nominal diameter Dg500 pipe installation of a power bar only 1.5-2 manual time. It takes about 12 manual hours to install the hole plate. If the pipe diameter is larger, it saves more time and less labor intensity.
6, the differential pressure signal is stable, the measurement accuracy is high, the blocking design, the pressure loss is small, the energy consumption is low, the maintenance is free.
7, the sensor design is novel, unique structure, the probe pressure hole essence blocking, integrated double cavity structure, high strength, suitable for high temperature and high pressure occasions.
8, a wide range of applications, suitable for various sizes of round pipe and square pipe.
9, with temperature, pressure measurement, density compensation.
Principle of measurement
Barb flowmeter is a kind of insert flow measuring instrument. A Vibara sensor is inserted into the pipe. As the fluid flows through the sensor, a high pressure distribution is generated in the front (in the direction of the incoming flow) and a low pressure distribution is generated in the rear. There are several pairs (generally three pairs) of pressure holes arranged according to certain rules in the high and low pressure areas of the sensor, and they are measured respectively
Total pressure (including static pressure and mean velocity pressure)Pl and static pressure P2. P1 and P2 are respectively introduced into the differential pressure transmitter to measure the travel pressure △P= p1-p2, △P reflects the average velocity of the fluid, so as to calculate the flow rate of the fluid. The flow calculation formula is as follows:
1. Volume flow formula
2. Mass flow formula
Where: Qm - mass flow kg/h
Qv - Volume flow (under working conditions) m3/h
D - Actual pipe diameter mm
△P - Sensor output differential pressure Pa
ρ -- fluid density kg/ m3
Type of construction
1, the whole welding type
Applicable media: air, gas, flue gas, natural gas, tap water, boiler feed water, rot solution; Saturated steam, superheated steam (equipped with condenser), etc
Pressure range: usually 0~40.0MPa
Temperature range: usually -80~550ºC
Range ratio: greater than 10:1
Minimum flow rate: gas ≥3.5m/s liquid ≥0.6m/s
Vapor ≥9m/s
Measurement accuracy: 1%
Repeatability: ±0.1%
Diameter range: 80~500mm
2, online installation and adjustment
Applicable media: air, gas, flue gas, natural gas,
Tap water, boiler feed water, rot solution;
Saturated steam, superheated steam (with condensation
Apparatus, etc.
Pressure range: usually 0~2.5MPa
Temperature range: usually -80~300ºC
Range ratio: greater than 10:1
Minimum flow rate: gas ≥3.5m/s liquid ≥0.6m/s
Vapor ≥9m/s
Measurement accuracy: 1%
Repeatability: ±0.1%
Diameter range: 50~5000mm
3. Adjustable flange connection
Applicable medium: gas, liquid, steam
Pressure range: usually 0~10.0MPa
Temperature range: usually -80~550ºC
Range ratio: greater than 10:1
Minimum flow rate: gas ≥3.5m/s liquid ≥0.6m/s
Vapor ≥9m/s
Measurement accuracy: 1%
Repeatability: ±0.1%
Diameter range: 50~2000mm
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