Zhejiang parameter steam vortex flowmeter parameters / steam Vortex Flowmeter Selection / steam Vortex ..

Suqian instrument Chong Instrument Co., Ltd. is a focus on product research and development sales steam vortex, vortex flow meter company, the company's steam vortex, vortex flowmeter selling well received by customers at home and abroad! LUGB series steam vortex flowmeter is mainly used for industrial pipe flow measurement in steam fluid medium, characterized by a small pressure loss, large measuring range, high accuracy when measuring actual volume flow is almost free from fluid density, pressure, temperature, Effect of viscosity and other parameters. No moving mechanical parts, so high reliability and low maintenance. Instrument parameters can be long-term stability. Steam vortex flowmeter piezoelectric stress sensors, high reliability, can work in the operating temperature range of -20 ℃ ~ + 250 ℃ of. Analogue standard signals, digital pulse signal output, easy and supporting the use of computers and other digital systems, is a more advanced and ideal flow meter. First, the working principle set triangular columnar vortex of steam fluid, from the vortex of both sides alternately produce a regular vortex, this vortex is called Karman vortex, vortex column in the vortex of the downstream arranged asymmetrically. Vortex set the frequency is f, the average flow rate of the measured medium, vortex shedder welcome stream surface width d, the table body diameter is D, you can get the following equation: f = SrU1 / d = SrU / md formula U1-- vortex of both sides average velocity, m / s; Sr-- Strouhal number; m-- vortex of both sides in the bow area and the pipe cross-sectional area of ??the pipe than the volume flow rate qv of qv = πD2U / 4 = πD2mdf / 4Sr K = f / qv = [πD2md / 4Sr] -1 meter coefficient K-- flowmeter pulses / m3 (P / m3). K except with the vortex shedder, pipe geometry related, but also with the Strouhal number related. Strouhal number is a dimensionless parameter, it vortex shape and Reynolds occurrence, Figure 2 shows the Strouhal number and Reynolds pipeline diagram of a cylindrical vortex shedder. The figure shows, in the range of ReD = 2 × 104 ~ 7 × 106, Sr can be regarded as constant, which is the normal operating range of the instrument. Strouhal number and Reynolds number curve where qVn, qV-- respectively under standard conditions (0oC or 20oC, 101.325kPa) and volume flow conditions, m3 / h; Pn, P-- respectively under standard conditions and the conditions of absolute pressure, Pa; Tn, T-- respectively, under standard conditions and conditions of thermodynamic temperature, K; Zn, Z-- respectively, under standard conditions and conditions of gas compressibility factor . Seen from the above equation, the output pulse frequency signal VSF is not affected by changes in fluid properties and composition, that the meter factor only body shape and size and pipes, etc. and the bluff in a certain range of Reynolds number related. But as a flow meter in the material balance and energy measurement of mass flow rate to be detected, then the output signal of the flow meter should also monitor the volume flow and fluid density, fluid properties and composition still have a direct impact on the flow measurement. Steam vortex flowmeter is based on the principle Karman vortex flowmeter new measurement of fluid flow in closed conduits. Because of its excellent ability to adapt media, without temperature and pressure compensation can directly measure actual volume flow of steam, air, gas, water, liquid, with temperature and pressure sensors measure the standard volumetric flow and mass flow, is throttling flowmeter ideal alternative. In order to improve high-temperature steam vortex flowmeter and anti-vibration performance, the company recently developed a LUGB improved vortex flow sensors, because of its unique structure and material selection so that the sensor can be high temperature (350 ℃), strong vibration in ( ≤1g) use of harsh conditions. In practical applications, often far below the upper limit of the maximum flow rate of the instrument, as the load changes, the minimum flow rate is often lower than the lower limit of the instrument, the instrument is not working at its optimum operating segment, in order to solve this One problem, commonly used in the measurement of the reduced diameter at increasing the flow rate measurement, and use a smaller diameter instrument to facilitate the measurement instrument, but this way there must be adjustable over a length of 15D straight between the adjustable tube and instruments rectified pipe sections, the processing, installation is not easy. I developed profile shape LGZ adjustable arc rectifier, a rectifier, increase the flow rate and velocity distribution of the multiple roles change, the structure of small size, only 1/3 of the inner diameter of the process tube, formed integral with the vortex flowmeter only need another additional period of straight pipe, can also reduce the requirements process pipe straight pipe, installation is very convenient. ◆ Measuring media: gas, liquid, vapor ◆ Specifications Falanca mounted caliber caliber select 25,32,50,80,100 ◆ flanged caliber Select 100,150,200 ◆ normal flow measurement range velocity measurement range of Reynolds numbers 1.5 × 104 ~ 4 × 106; gas 5 ~ 50m / s; liquid 0.5 ~ 7m / s ◆ Accuracy 1.0 1.5 ◆ measured medium temperature: room temperature -25 ℃ ~ 100 ℃ ◆ high temperature -25 ℃ ~ 150 ℃ -25 ℃ ~ 250 ℃ ◆ Output signal pulse voltage output signal high 8 ~ 10V 0.7 ~ 1.3V ◆ low pulse duty of about 50%, the transmission distance of 100m ◆ pulse current remote signal 4 ~ 20 mA, transmission distance of 1000m ◆ meter use Ambient temperature: -25 ℃ ~ + 55 ℃ Humidity: 5 ~ 90% RH50 ℃ ◆ Material Stainless steel, aluminum ◆ Power DC24V or lithium battery 3.6V ◆ Explosion levels intrinsically safe iaIIbT3-T6 ◆ Protection IP65 steam Vortex Flowmeter Product Selection Code through runoff range m / h LUGB-25 DN25 1 ~ 10 (liquid) 25 to 60 (gas) steam flow Check the manual, DN300 above recommended insertion vortex flowmeter LUGB-32 DN32 1.5 ~ 18 (liquid) 15 - 150 (gas) LUGB-40 DN40 2.2 ~ 27 (liquid) 22.6 to 150 (gas) LUGB-50 DN50 4 ~ 55 (liquid) 35 - 350 (gas) LUGB-80 DN80 9 ~ 135 (liquid ) 90 to 900 (gas) LUGB-100 DN100 14 ~ 200 (liquid) 140 - 1400 (gas) LUGB-150 DN150 32 ~ 480 (liquid) 300 - 3000 (gas) LUGB-200 DN200 56 ~ 800 (liquid) 550 5500 (gas) code Function 1 N no temperature and pressure compensation Y have temperature and pressure compensation Code Output Model F1 4-20mA output (two-wire) F2 4-20mA output (three-wire) F3 RS485 communication interface, code-named measured medium liquid J2 J1 Code gas J3 steam connection L1 L2 Falanca mounted flanged code Function 2 E1 1.0 级 E2 1.5 级 normal T1 T2 T3 high temperature steam P1 1.6MPa P2 2.5MPa P3 4.0MPa D1 D2 DC24V internal 3.6V power supply B1 Stainless steel B2