Shanghai Hongyi Vortex Flow MeterThe Vortex Flowmeter is a flow measurement instrument based on the Karman vortex street principle, suitable for monitoring the flow of gases, vapors, and liquids. Its core advantages lie in its simple structure, high reliability, and strong adaptability, especially in complex working conditions such as high temperature, high pressure, and corrosive media. Here are its several core advantages and detailed analysis:
1. No mechanical moving parts, high reliability
Principle: The flow rate is calculated by detecting the alternating vortex frequency generated when the fluid passes around the bluff body.
Advantage:
Maintenance free: No bearings, gears or other vulnerable parts, long-term stability better than turbine flow meters.
Wear resistance: suitable for media containing small particles (such as saturated steam, dirty gases).
Compare turbine flow meters:
Turbine flow meters require regular replacement of bearings, while vortex flow meters have a lifespan of over 10 years.
2. Wide range ratio, adaptable to flow fluctuations
Typical range ratio: 10:1 (some models can reach 15:1), which is better than orifice flow meters (3:1).
Application Scenario:
Steam flow measurement (large fluctuations in boiler outlet flow).
Periodic flow monitoring of natural gas pressure regulating stations.
3. Widely applicable media
| Media Type | adaptability |
| gas | Air, natural gas, coal gas, etc. require temperature and pressure compensation. |
| steam | Saturated steam, superheated steam (high temperature resistant design, up to 400 ℃). |
| liquid | Water, oil, corrosive liquids (anti-corrosion materials such as 316L/Hastelloy should be selected). |
| two-phase flow | Limited adaptation (requiring special algorithms, usually recommended to avoid). |
4. Low voltage loss, energy-saving and efficient
Comparison of pressure loss:
The pressure loss of vortex flowmeter is about 1/5~1/10 of that of orifice flowmeter.
In gas measurement with large diameters (DN200 or above), the energy-saving effect is good.
Case: Compressed air metering in a chemical plant saves over 10000 yuan in electricity bills annually (compared to orifice plates).
5. High precision and repeatability
Accuracy: ± 1% R (liquid), ± 1.5% R (gas/vapor), temperature and pressure compensation is required for trade grade applications.
Repeatability: ± 0.2%~0.5%, suitable for process control (such as reactor feeding in the pharmaceutical industry).
6. High temperature and high pressure resistance
Temperature range: -40 ℃~+400 ℃ (special models can reach up to 450 ℃).
Pressure rating: PN16~PN420 (high pressure type suitable for steam pipelines).
Typical applications:
Overheated steam pipeline of power plant (4MPa, 350 ℃).
High pressure reactive gas monitoring in the petrochemical industry.
7. Flexible output signal
Standard output:
Pulse signal (frequency linearly correlated with flow rate).
4-20mA analog signal (with HART protocol).
Intelligent Expansion:
Integrated RS485/Modbus, supporting remote monitoring of the Internet of Things (IoT).
8. Relatively easy to install
Requirements for straight pipe section: 10D at the front and 5D at the back (D is the pipe diameter), lower than the orifice plate (20D at the front and 10D at the back).
Directional adaptability: Both horizontal and vertical pipelines can be installed (gas is recommended to be installed vertically upwards).