V Corn Flow Meter
The principal theory behind the V-Cone flow meter is Bernoulli’s theorem for energy conservation in a closed pipe. According to this theorem, for a constant flow, the pressure in a pipe is inversely proportional to the square of the velocity; as the velocity increases, the pressure decreases.
For example, as fluid approaches the V-Cone meter, it has a pressure of P1. As the fluid velocity increases at the constricted area of the V-Cone, the pressure drops to P2, as illustrated in the image below. Both P1 and P2 are measured at the V-Cone’s taps using various differential pressure transducers.
The Dp created by a V-Cone will increase and decrease exponentially with the flow velocity. As the constriction takes up more pipe cross-sectional area, more differential pressure will be made at the same flow rates.
Product features of V cone flowmeter:
1. It has good accuracy (≤0.5%) and repeatability (≤0.1%).
2. It has a wide range ratio (10:1～15:1)
3. Self-rectifying function, only a very short straight pipe section is needed (1～3D before 0～1D).
4. Self-cleaning function, which can detect dirty and easily fouling fluids, suitable for medium with more impurities such as blast furnace gas.
5. Self-protection function, the key parts of throttling parts are not worn out, and they can keep working stably for a long time.
6. High temperature, high pressure, corrosion resistance, not afraid of vibration.
7. The types of measurable fluids are very wide (liquid, gas, steam), the flow measurement range is wide (small flow to large flow), and the applicable pipelines are DN15 to DN3000.
8. The flow meter structure design is a fluid sweep type structure, it is impossible to intercept any entrained gas, liquid or solid phase dirt in the fluid. It is very suitable for flow measurement of dirty fluids, such as coke oven gas, wet gas, etc.
9. No moving parts
10. When the fluid flows through the filled inner cone, it will form a boundary layer around its periphery and channel the fluid away from the edge of the cone’s tail, thereby reducing the possibility of it being worn.
11. Measure steam and hot water at the heat exchange station, without straight pipe section. Due to the relatively small space of the heat exchange station, the selection of general flow meters requires a long straight pipe section, which affects the operation accuracy. It is used to measure blast furnace gas. It has a self-cleaning effect and the pressure pipe is not easy to be blocked.
| Body material | S.S.304, S.S.316 | |
| Accuracy | ±0.5% of rate (certain fluids and Reynolds number applications require specific calibrations to achieve this value) | |
| Configurations | Precision flow tube and wafer-type | |
| Fitting Type | Flanged, threaded, Others on request | |
| Process Media | Liquid or Gas | |
| Line size | 25 ~ 300 mm | |
| Head Loss | Varies with beta ratio and DP | |
| Installation Requirement | Typically 0-3 diameters upstream and 0-1 diameters downstream of the cone are required, depending on fittings or valves in the adjacent pipeline. | |
| Pressure Range | up to 20 bar [Customize Option Available] | |
| Electronics | Direct Mount or Remote Mount | |
| Standard Beta Ratio | 0.45 to 0.80 | |
| Display | LCD | |
| Power | 24VDC /230VAC | |
| Output | 4 – 20mA, RS485 Modbus RTU [ Optional ] | |
| Temperature Range | Up to 350’C | |
As per Application
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