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SKLU series vortex flowmeters are mainly used for flow measurement of industrial pipeline fluids, such as gas, liquid, vapor and other media. It is characterized by small pressure loss, large measuring range and high accuracy. It is hardly affected by fluid density, pressure, temperature, viscosity and other parameters when measuring volume flow under working conditions. There are no movable mechanical parts, so the reliability is high and the maintenance is small. The instrument parameters can be stable for a long time. The vortex flowmeter adopts piezoelectric stress sensor, which has high reliability and can work in the working temperature range of -20℃～+250℃. It has analog standard signal and digital pulse signal output. It is easy to use with digital systems such as computers. It is a relatively advanced and ideal flow meter.

Principle of Vortex Flowmeter
  When a triangular cylindrical vortex generator is installed in the fluid, regular vortices are alternately generated from both sides of the vortex generator. This type of vortex is called Karman vortex. As shown in Figure 1, the vortex array is arranged asymmetrically downstream of the vortex generator. .
 The vortex flowmeter is a new type of flowmeter for fluid flow measurement in closed pipelines based on the Karman vortex principle. Because of its good medium adaptability, it can directly measure the volume flow of steam, air, gas, water, and liquid without temperature and pressure compensation. Equipped with temperature and pressure sensors, it can measure the volume flow and mass flow under standard conditions, which is throttling. The ideal substitute product of type flowmeter.
In order to improve the high temperature resistance and vibration resistance of the vortex flowmeter, our company has recently developed the SKLU improved vortex flow sensor. Due to its unique structure and material selection, the sensor can operate at high temperature (350℃) and strong vibration (≤ 1g) used in harsh working conditions.
In practical applications, the maximum flow is often much lower than the upper limit of the instrument. As the load changes, the minimum flow is often lower than the lower limit of the instrument. The instrument does not work in its optimal working period. In order to solve this One problem is that the diameter at the measuring point is usually reduced to increase the flow velocity at the measuring point, and a smaller diameter instrument is used to facilitate the measurement of the instrument. However, this method of reducing diameter must have a length of 15D or more between the reducing tube and the instrument. The pipe section is rectified, which makes processing and installation inconvenient. The LGZ variable diameter rectifier with a circular arc profile developed by our company has multiple functions of rectifying, increasing the flow rate and changing the flow rate distribution. Its structure is small, only 1/3 of the inner diameter of the process tube, and it is integrated with the vortex flowmeter. , Not only does not need to add another straight pipe section, but also can reduce the requirements for the straight pipe section of the process pipe, and the installation is very convenient.
For ease of use, the battery-powered local display type vortex flowmeter adopts micro-power consumption high-tech. It can run continuously for more than one year with lithium battery power supply, which saves the procurement and installation costs of cables and display instruments. It can display instantaneous flow, Cumulative flow, etc. The temperature compensation integrated vortex flowmeter also has a temperature sensor, which can directly measure the temperature of saturated steam and calculate the pressure, thereby displaying the mass flow rate of saturated steam. The temperature and pressure compensation integrated type is equipped with temperature and pressure sensors, which can be used for gas flow measurement to directly measure the temperature and pressure of the gas medium, thereby displaying the standard volume flow of the gas.
◆Measuring medium: gas, liquid, steam
◆Caliber specification: flange card-mounted caliber selection DN15~300
◆Flow measurement range Normal measurement velocity range Reynolds number 1.5×104～4×106; gas 5～50m/s; liquid 0.5～7m/s
Normal measurement flow range The liquid and gas flow measurement range is shown in Table 2; the steam flow range is shown in Table 3
◆Measurement accuracy 1.0 grade 1.5 grade 2.5 grade
◆The temperature of the measured medium: normal temperature –25℃～100℃
◆High temperature –25℃～150℃ -25℃～250℃
◆Output signal Pulse voltage output signal High level 8～10V Low level 0.7～1.3V
◆The pulse duty cycle is about 50%, and the transmission distance is 100m
◆Pulse current remote transmission signal 4～20 mA, transmission distance is 1000m
◆Instrument use environment Temperature: -25℃～+55℃ Humidity: 5～90% RH50℃
◆Material Stainless steel, aluminum alloy
◆Power supply DC24V or lithium battery 3.6V
◆Explosion-proof grade Intrinsically safe type iaIIbT3-T6
◆Protection grade IP65