v-cone flowmeters meter OEM manufacturers better sales of gas liquid flow ..

V-Cone flowmeter flowmeter ________________________________________ I. Overview V-Cone flowmeter (V-coneflowmeter) was in the 1980s a novel differential pressure flow meter, which uses a V-cone flow field generated in the throttling effect to measure flow. Compared with ordinary throttle body, it changes the throttle layout, changed annular throttle throttle from the center hole. Long-term use of proven, V-cone differential pressure flow meter, compared with the general, high long-term accuracy, repeatability, subject to the limitations of the small installation conditions, wear-resistant, wide measuring range, suitable for dirty media, pressure loss, etc. ... but also because of the V-cone flow field itself as a rectifier to become an excellent new two meter having unique properties, works V-Cone flowmeter is a differential pressure flowmeter, its principle is based on closed Bernoulli's Principle of energy conversion of the pipeline. Using fluid continuity equation and Bernoulli's equation can be deduced mathematical relationships measured flow rate and the output value of the differential pressure. Continuity equation is a mathematical expression that the mass conservation law applied fluid movement. Flow equation is as follows: Q = ky Q: Flow △ P: Pressure k: After the media and the meter is determined as constant for the V-Cone flowmeter is: where: K = meter factor, dimensionless; GC = acceleration due to gravity ; D = internal diameter of management, d = the outer diameter of the cone, β = diameter ratio, dimensionless; CD = calibration constant coefficient, dimensionless. Practical flow equation is: qm: medium mass flow k1: constant, dimensionless D: pipe diameter C: flow coefficient y: inflatable coefficient (in the non-compression applications ε = 1) ρ: fluid density △ P: Pressure Three Features 1, before and after the straight pipe requirements are shorter, generally just upstream from 0 to 3D, just downstream from 0 to 1D. 2, high precision, differential output values ??can be achieved ± 0.1% repeatability. 3, range than the width: 15: 14, the pressure loss is small, only orifice 1 / 2-1 / 3. Close to the venturi tube 5, after V cone edge produce small vortex, differential output stability, small fluctuations. 6, no debris stagnation, the tapered design thoroughly purged guaranteed. Throttle area long-term stability, signal stability. Fourth, the main technical parameters 1, accuracy class: 0.5 ~ 1.0 (DP flow transmitter accuracy should be higher than 0.2, containing 0.2) (β: 0.45 ~ 0.85, when β∠0.55, turndown ratio of 4: 1 , accuracy class: 0.25) Repeatability: ± 0.1% 2, the working pressure: ≤16MPa 3, the working temperature: -40-700 ° C 4, ambient temperature: -40-65 ° C, V-Cone flowmeter ambient temperature to 0-50 ° C 5, the pipe diameter: 25-3000mm 6, the output signal: 4-20mA 7, power supply voltage: 24VDC 8, Medium: V-type cone flowmeter to measure liquid, gas, steam and gas and liquid phase medium. Fifth, product classification and structure according to the different product scope of supply and the output signal, V-Cone flowmeter can be divided into four categories: 1), V-Cone Flow Sensor (basic) This product provides differential signal is formed only section (throttle section), does not provide differential pressure flow transmitter and flow display section. Differential output signal. Flange 2, high pressure taps 3, 4 low pressure taps, pipes 5, V-type cone Nominal size 25 40 50 80 100 150 200 250 300 400 A (mm) 400 400 420 450 500 600 750 850 960 1000 Nominal size 500 600 800 1000 1200 1400 1500 1600 1800 2000 A (mm) 1100 1200 1600 2000 2300 2600 2800 3000 3600 4000 Note: V cone made of 1Cr18Ni9Ti, users need other materials shall be given. 2, V-Cone Flow Transmitter (Figure 2) forming part of the product offer and DP flow transmitter differential pressure signal, does not provide flow display some of the output signal is 4-20mA. Note: From the top of the differential pressure transmitter vertical wall height H: normal, clean, fluid H when the installation is 300 condenser or isolators H 500