The advantages of insert type vortex flowmeter are excellent anti vibration performance, no zero drift, and high reliability. Through extensive waveform and frequency analysis of the vortex flowmeter over a long period of time, a better probe shape, wall thickness, height, probe rod diameter, and matching piezoelectric crystal were designed. Advanced CNC lathes were used for processing to ensure technical parameters such as coaxiality and smoothness, and special processing techniques were employed to overcome the common problem of the inherent self oscillation frequency of the vortex flowmeter affecting the signal.
Manufacturer of insertion vortex flowmeter
Insert type vortex flowmeter is a volumetric flowmeter developed and produced based on the Karman vortex principle to measure the volumetric flow rate, standard condition volumetric flow rate, or mass flow rate of gases, vapors, or liquids. Mainly used for flow measurement of industrial pipeline media fluids, such as gases, liquids, steam, and other media. Widely used in industries such as chemical, food, heating, and electricity. Its characteristics are small pressure loss, large range, high accuracy, and almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring volumetric flow rate under working conditions. Without movable mechanical components and using piezoelectric stress sensors, it has high reliability, low maintenance, and can be used stably for a long time. It has both analog standard signals and digital pulse signal outputs, making it easy to use in conjunction with digital systems such as computers. It is a relatively advanced and ideal measuring instrument.
Working principle of insert type vortex flowmeter
According to the International Organization for Standardization IS07145 (Measurement of fluid flow in a closed circular cross-section pipeline – Velocity measurement method at one point in the cross-section), a vortex street velocity probe embedded with a piezoelectric crystal is inserted into a large-diameter industrial pipeline to convert the Karman vortex frequency into a current or voltage pulse signal proportional to the flow rate or a 4-20mADC current signal.
The LUGB insert type vortex flowmeter adopts the International Organization for Standardization IS07145 (Measurement of fluid flow in a closed pipeline with a circular cross-section – Velocity measurement method at one point in the cross-section), and uses a vortex flowmeter probe embedded with a piezoelectric crystal. It is inserted into a large-diameter industrial pipeline and converts the Karman vortex frequency into a current or voltage pulse signal proportional to the flow rate or a 4-20mA current signal.
Insert type vortex flowmeter is a volumetric flowmeter that measures the volumetric flow rate, standard condition volumetric flow rate, or mass flow rate of gases, vapors, or liquids based on the Karman vortex principle. The differential technology used in this instrument, combined with isolation, shielding, filtering and other measures, overcomes the problems of poor seismic resistance and small signal data disorder of similar products, and adopts sensor packaging technology and protective measures to ensure the reliability of the product.
Technical parameters
| Measuring medium | Liquid, gas, saturated steam, superheated steam |
| accuracy level | Liquid ±1.0%, gas (steam) ±1.5%, plug-in ±2.5% |
| Working pressure | 1.6MPa |
| Medium temperature | Ordinary type -40 ~ 150℃ Medium temperature type -40 ~ 250℃ High temperature type -40 ~ 350℃ |
| Output signal | Three-wire voltage pulse, low level 0 ~ 1V, high level > 4V, duty cycle 50%; Two-wire system standard current 4 ~ 20mA; Three-wire system standard current 0 ~ 10mA |
| Working environment | -35℃ ~ +60℃, humidity ≤95%RH |
| Working power supply | DC12V；DC24V |
| Shell material | Carbon steel, stainless steel |
| Explosion-proof type | Intrinsically safe ExibIICT6 |
Advantages of insert type vortex flowmeter
- The structure is simple and sturdy, with no movable parts, high reliability, and very reliable for long-term operation;
- Easy installation and convenient maintenance;
- The detection sensor does not directly contact the measured medium, with stable performance and long service life;
- The output is a pulse signal proportional to the flow rate, with no zero drift and high accuracy;
- Wide measurement range, with a range ratio of up to 1:10;
- Less pressure loss, lower operating costs, and more energy-saving significance;
- Within a certain Reynolds number range, the output signal frequency is not affected by the physical properties and composition changes of the fluid, and the instrument coefficient is only related to the shape and size of the vortex generator. When measuring the fluid volume flow rate, there is no need to compensate, and after replacing accessories, there is generally no need to recalibrate the instrument coefficient;
- Widely applicable, the flow rates of steam (saturated steam), gases (air, oxygen, nitrogen, coal gas, natural gas, gas, hydrogen, liquefied petroleum gas, hydrogen peroxide, flue gas, methane, butane, chlorine, gas, biogas, carbon dioxide, nitrogen, acetylene, phosgene, oxygen, compressed air, argon, toluene, benzene, xylene, hydrogen sulfide, sulfur dioxide, ammonia), steam, liquids, and water, liquids (water, high-temperature water, oil, food liquids, chemical liquids, etc.), liquids, and gases can be measured.
How to select productss
- Measurement medium: Vortex flowmeter is a velocity flowmeter, and its principle determines the type of measurement medium, which can be liquid, gas or steam. At present, the vast majority of industrial applications, such as nitrogen, compressed air, steam, thermal oil, etc., mostly use flange connected vortex flowmeters for measurement;
- Pipeline diameter: Flange connected vortex flowmeter can be divided into pipeline type and plug-in type installation according to different installation methods. For pipeline type flow meters, the diameter of the pipeline is the same as most other flow meters, with a small diameter of DN15 and a large diameter of up to DN300. If a larger caliber is required, plug-in installation can be chosen. The conventional caliber range can reach up to DN2000, and calibers above DN2000 will be supplied according to the agreement;
- Measurement accuracy: The accuracy of flange connected vortex flowmeter also has several levels, and it is classified according to the measuring medium. The pipeline type vortex flowmeter can achieve a measurement accuracy of 1.0 level for liquids and 1.5 level for gases. If it is an inserted vortex flowmeter, the accuracy can reach levels 1.5 and 2.5;
- Medium temperature: Generally speaking, it is divided into three ranges: room temperature, medium temperature, and high temperature. The temperature ranges are -40 to 100 ℃ (normal temperature), 100 to 250 ℃ (medium temperature), and 100 to 320 ℃ (high temperature). If the temperature of the medium on site is higher, such as some superheated steam, an orifice flowmeter can be used to measure it;
- Nominal pressure: It is mainly classified according to the installation method. The main demands in the market are as follows, such as flange clamping type (2.5MPa), flange connection type (1.0/1.6/2.5MPa), and plug-in installation type (1.6MPa/2.5MPa/4.0MPa);
- Power supply: According to the current market demand, there are mainly+12VDC (three wire pulse output)+ 24VDC (three wire pulse output type and two wire current output type) 3.6V lithium battery, dual power supply;
- Output signal: According to current market demand, there are mainly voltage frequency pulse output, two-wire 4-20mA output, and HART output. In addition, some situations may require digital output, and we can also provide RS485 communication via Modbus.
The insert type vortex flowmeter is suitable for process measurement and energy-saving management of various low viscosity single-phase fluids such as liquids, gases, steam, etc. in industries such as petroleum, chemical, metallurgical, mechanical, food, papermaking, pharmaceuticals, as well as urban pipeline heating, water supply, gas, etc.