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V-series V-cone flowmeter flow sensor
The combination of V-cone flow sensor and differential pressure transmitter is a novel differential pressure flowmeter that can accurately measure flu
Product details
The combination of V-cone flow sensor and differential pressure transmitter is a novel differential pressure flowmeter that can accurately measure fluids under various flow conditions within a wide Reynolds number range (8 × 103 ≤ Re ≤ 5 × 107). Like other differential pressure flowmeters, the principle is based on Bernoulli's law of energy conservation for continuous fluid flow in a closed pipeline. For an ideal fluid, the flow velocity of the medium is proportional to the square root of the differential pressure.
The unique physical structure of the V-cone flow sensor's conical throttling not only expands the measurement range of the medium flow rate, but also has a special structure for fluid rectification. Therefore, the straight pipe section requirement is very low in the process, which is completely different from other differential pressure flow meters that require a long straight pipe section to stabilize the fluid flow. The V-cone flow sensor inherits the advantages of good stability and strong universality of traditional differential pressure flow meters, and avoids the limitations of traditional differential pressure flow meters.
The basic principle of a V-cone flow sensor is to install a V-cone and corresponding pressure tap coaxially in the measuring tube. The measuring tube and V-cone are designed and precision machined.
◆Composition of flow measurement system:
VThe cone flowmeter consists of a flow measurement system consisting of a built-in cone joint fluid, a three valve group, heat dissipation components, a pressure pipe, a differential pressure transmitter, and a flow computer. For media such as gas and steam, temperature and pressure compensation can be added to form a mass flow rate and standard volume measurement system.
◆Technical parameters:
1Nominal diameter: DN50-DN700 (DN700 and above are welded);
2Nominal pressure: PN1.0、PN1.6、PN4.0（MPa）；
3Accuracy level: 0.5 level (differential pressure flow transmitter accuracy should be higher than 0.2 level, including 0.2 level), (β: 0.45-0.85, when β<0.55, range ratio 4:1, accuracy level: ≤ 0.30)
4Repeatability: ± 0.1%;
5Range ratio (range): usually 10:1, selecting appropriate parameters can achieve a ratio of 50:1
6Operating temperature range:- 40℃～550℃；
7Environmental temperature range:- 40℃～65℃；
8Work pressure: 0-40MPa (with multiple pressure levels to choose from)
9Small pressure loss: With the same β value, the pressure loss is 1/3 to 1/5 of the orifice plate
10Installation requirements for straight pipe section: front 0-3D straight pipe, rear 0-1D straight pipe section
11Applicable fluid media: ① Gas: Gas: Coke oven gas, blast furnace gas, city gas; Natural gas: including natural gas with a moisture content of 5% or more; Various hydrocarbon gases: alkanes, alkenes, and other gases; Corrosive gases: wet chloride gases, etc; Air: including air containing water, dust, compressed air, etc; Flue gas: flue gas emitted from various boilers and heating furnaces
② Liquid: Oil: Crude oil, fuel oil, hydrated emulsified oil, diesel, etc; Water: raw water, drinking water, production water, sewage, etc;
Various aqueous solutions: acid, alkali, saline solution, etc; Organic chemicals: methanol, ethylene glycol, xylene, etc;
③ Steam: saturated steam and superheated steam
④ Special fluid: oil+HC gas+sand; Aerated water: H2O+N2+air; H2O+CO2, etc
◆Main usage features:
1High accuracy and good repeatability: The V-cone flowmeter has an accuracy of ± 0.5% of the measured value and a repeatability of ± 0.2%.
2Wide range ratio and low pressure loss: The V-cone flowmeter has a normal range ratio of 10:1. Accurate parameters can achieve a ratio of 30:1, and the pressure loss of the V-cone flowmeter is only 1/5~1/10 of that of the orifice plate, which can greatly reduce operating energy consumption.
3Low requirements for installing straight pipe sections: Due to the unique center streamline throttling structure of the V-cone flowmeter, the problem of straight pipe section rectification is well solved, directly rectifying irregular fluids into ideal fluids. The front straight pipe section is 0-3D, and the rear straight pipe section is 0-1D.
4Long term stability performance: The unique design of the cone ensures that the fluid flows through the cone in a gradual process without sudden changes. The flow rate first passes through the cone and then reaches the edge of the cone. Therefore, the cone will not be frequently worn by the fluid, and the β value can remain unchanged for a long time. Therefore, the instrument can be used for a long time without recalibration.
5Wide application range, capable of measuring high temperature, high pressure and complex working conditions media: V-cone flowmeter, like orifice plate throttling device, works at a temperature and pressure depending on the material and grade of the pipeline and flange. Special throttling fluid enables it to measure multiphase water flow, electromagnetic interference media, various mixed gases, etc. Very suitable for measuring dirt such as steam, gas, crude oil, etc. The application range of V-cone flowmeter is very wide, with a temperature of -100 ℃~500 ℃, a maximum pressure of 40Mpa, and a wide Reynolds number range of 8 × 103~5×106Gas: coal gas, natural gas, air, oxygen, nitrogen, hydrogen, methane, propylene, flue gas, saturated vapor, superheated vapor, etc. Liquids: water, oil products, emulsions, pure water, hydrogen peroxide, glycerol, alcohols, purified water, sewage, various corrosive media, etc
6Has self-cleaning ability: The special design of the differential pressure V-cone flowmeter eliminates dead zones on its cone, so there will be no accumulation of fluid debris, sticky residue, and impurities on the cone, and it has self-cleaning function.
◆Flow meter model specification table
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VCone flowmeter
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Selection instructions
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Nominal Diameter
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-XXX
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100Representing DN100
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structural style
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Z
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Intelligent integration
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L
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split type
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Measurement medium
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1
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liquid
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2
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gas
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3
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steam
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Ontological form
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S
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Pipeline type SO (with neck flat welding flange connection method)
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W
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Pipeline type WN (with neck welding flange connection method)
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F
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Flange pressure tapping method
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B
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Direct welding type
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J
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Insulation jacket type
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A
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Anti-corrosion type
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P
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Square tube shape
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H
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Pipe clamp type
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Pipeline static pressure
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A
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0~0.6MPa
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B
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0~1.0MPa
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C
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0~1.6MPa
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D
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0~2.5MPa
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E
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0~4.0MPa
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F
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0~6.3MPa
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G
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0~10MPa
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H
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0~16MPa
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I
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0~25MPa
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J
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0~40MPa
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Compensation method
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0
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No compensation
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P
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Single pressure compensation
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T
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Single temperature compensation
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Q
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Full compensation for pressure and temperature
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Integrated signal output
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0
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not have
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1
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4~20Ma
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2
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pulse
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3
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Hart
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Integrated power supply mode
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0
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Internal battery power supply
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1
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Dual selection of battery and 24VDC power supply
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2
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External 24VDC power supply
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Provide the inner and outer diameters of the pipeline, provide the pipeline material, indicate the flange specifications of the process pipeline, and specify the liquid type, gas and steam properties. Other required process parameters include fluid name, scale flow unit, commonly used maximum and minimum flow rates, working pressure, working temperature, medium density and viscosity, and local average atmospheric pressure
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