The Company production of SDUG-Series Intelligent Vortex Flowmeter, mainly used for industrial pipe Fluid flow measurement, such as gas, liquid, vapor, and other media. Which is characterized by a small pressure loss, range, high precision, almost from the impact of fluid density, pressure, temperature, viscosity and other parameters in the measurement of volume flow of the working conditions. No moving mechanical parts, high reliability, less maintenance. The instrument parameters can be long-term stability. This instrument uses a piezoelectric stress sensors, high reliability, can work in -20 ° C ~ +250 ° C operating temperature range. Analogue standard signals, digital pulse signal output, easy to use with computers and other digital systems supporting a more advanced, the ideal flow meter. 
 Principle: 

 Set of triangular columnar vortex shedder in the fluid, from the bluff body alternately on both sides of a regular vortex, this vortex is known as a Karman vortex, as shown, the vortex column bluff body downstream non-symmetrically arranged . 
 Set vortex of the frequency f, measured medium, the average flow rate of the bluff body welcome stream surface width d, the table body diameter is D, you can get the following relationship: 
 f = SrU1 / d = SrU / md 
 (1) 
 Where U1 is - the body on both sides of the vortex average velocity, m / s; 
 Sr - Strouhal number; 
 m - the bluff body on both sides of the bow area of ??the pipe cross-sectional area ratio 

 Qv for the volume flow in the pipeline 
 qv = πD2U / 4 = πD2mdf/4Sr 
 (2) 
 K = f / qv = [πD2md/4Sr] -1 
 (3) 
 Where K - the meter factor of the flowmeter, the number of pulses / m3 (P/m3). 
 K in addition to the bluff body, the geometric dimensions of the pipe to the outside, and the Strouhal number. Strouhal number of dimensionless parameters, with the vortex body shape and the Reynolds number, Strouhal number and the pipe Reynolds number diagram shown in Figure 2 for a cylindrical vortex body. The figure shows, ReD = 2 × 104 × 106 range, Sr. can be regarded as constant, which is the normal operating range of the instrument. When measuring gas flow, the VSF flowmeter formula for 




 Figure 2 Strouhal number and Reynolds number curve 
 Where qVn, qV - were under standard conditions (0oC or 20oC, 101.325kPa) and conditions of volume flow, m3 / h; 
 Pn, P -, respectively, under standard conditions and conditions of absolute pressure, Pa; 
 Tn, T -, respectively, under standard conditions and conditions of thermodynamic temperature, K; 
 Zn, and Z - were under standard conditions and conditions of gas compressibility factor. 
 Be seen from the above equation, the VSF pulse frequency of the output signal from the fluid properties and composition of the impact of changes, the meter factor only in a certain Reynolds number range of the bluff body and pipe shape and size. However as a flowmeter should be measured in the material balance and energy measurement quality traffic, then the flowmeter output signal while monitoring the volumetric flow rate and fluid density, fluid properties and composition of the flow measurement or have a direct impact. 
 The vortex flowmeter is a new type of flowmeter in closed conduits - Measurement of fluid flow based on the principle of the Karman vortex. Because of its good media adaptability to working conditions, without temperature and pressure compensation can be direct measurement of steam, air, gas, water, liquid volumetric flow rate, with temperature, volume flow and mass flow of the pressure sensor can measure the standard condition is to cut expenditure Flowmeter ideal alternative. 
 In order to improve the high temperature and anti-vibration performance of the SD-LUG Series Intelligent Vortex Flowmeter, I recently developed a HLUG improved vortex flow sensors, because of its unique structure and selection of materials so that the sensor can be at a high temperature (350 ° C) the harsh conditions of strong vibration (≤ 1g). 
 In practical applications, often the maximum flow rate is much lower than the upper limit of the instrument, as the load changes, the minimum flow rate is often lower than the lower limit of the instrument, the instrument does not work in its best working segment, in order to solve this problem commonly used in the measurement at the reduced diameter to improve the measurement at the flow rate, and selection of a smaller caliber instruments to facilitate the instrument's measurement, but this adjustable way adjustable tube and instrumentation length of straight pipe more than 15D rectifier, processing, installation is not very convenient. Our company has developed longitudinal shape the arc LGZ adjustable rectifier, with rectification, to improve the flow rate and change the velocity distribution of the multiple roles, the structure of small size, only 1/3 of the process tube inner diameter, made one with the vortex flowmeter not only do not need another additional section of straight pipe, but also can reduce the process pipe straight pipe requirements, installation is easy. 
 Display type vortex flowmeter for easy to use, battery-powered local micro-power high-tech lithium battery-powered uninterruptible more than one year of operation, saving the procurement and installation costs of cable and display instruments, may show the instantaneous flow, cumulative flow. The temperature compensation type vortex flowmeter with a temperature sensor can directly measure the temperature of saturated steam and calculate the pressure, thus showing the mass flow of saturated steam. Temperature and pressure compensation for a body with temperature, and pressure sensors for gas flow measurement can directly measure the temperature and pressure of the gas medium in order to show the standard volumetric flow of gas. 
 A measuring medium: gas, liquid, vapor 
 Two caliber specifications Fa Lanka mounted caliber choose 25,32,50,80,100 
 3 flange connection type caliber choose 100,150,200 
 4 flow measurement range measurement of the normal flow rate range of Reynolds number of 1.5 × 104 4 × 106; gas 5 to 50m / s; liquid 0.5 ~ 7m / s, 
 Normal measurement of the flow range of liquid and gas flow measuring range shown in Table 2; vapor flow range in Table 3 
 5 measurement accuracy of 1.0 and 1.5 
 The measured medium temperature: room temperature -25 ° C to 100 ° C 
 7 High temperature -25 ℃ ~ 150 ℃ -25 ℃ ~ 250 ℃ 
 Output signal pulse voltage output signal is high 8 ~ 10V low 0.7 ~ 1.3V 
 Pulse duty cycle of about 50%, the transmission distance of 100m 
 10 pulse current remote signal 4 to 20 mA, the transmission distance of 1000m 
 11 instrument using the ambient temperature: -25 ℃ ~ +55 ℃ Humidity: 5 ~ 90% RH50 ℃ 
 12 Material stainless steel, aluminum 
 13 power supply DC24V or lithium battery 3.6V 
 14 Explosion-proof In this safe iaIIbT3-T6 
 15 protection class IP65 
 Jiangsu A Side instrument in strict accordance with ISO9001-2000 quality management system of scientific management. Relying on strong technical force, advanced equipment and production technology, perfect detection means, the production of high standard. According to the comprehensive service system, and systematic service. "Competition of survival, quality and efficiency, technological progress, management and development of mechanisms to produce high quality products that meet customer expectations and requirements, the A Side Company warmly welcomes new and old customers inquiries, would like to to improve the service to become a good partner for your "instrument" of the road.