『Steam vortex flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Calibration of vortex flowmeter
The calibration of vortex flowmeter is an important step to ensure its accuracy and legality during use, mainly carried out through two methods: the standard meter method and the bell jar method. Standard table method: Principle: Connect the vortex flowmeter as a standard with the tested flowmeter in series, and calculate the error of the tested flowmeter by comparing the readings of the two. Scope of application: Suitable for various fluids and liquids of different viscosities. Advantages: Installed in a closed system, it can reduce time measurement errors; Having the advantages of online verification and serving as a measurement standard for closed pipelines; High degree of automation, compact equipment, and low cost. Attention: The accuracy and stability of the standard table itself need to be regularly monitored. Bell jar method: Principle: The device based on lead stove and volumetric method calculates the flow rate by measuring the change in gas volume when the bell jar rises or falls. Scope of application: Suitable for calibrating air flow meters that are close to atmospheric pressure, such as gas meters and wet gas flow meters. The verification flow range is relatively small, with an accuracy between 0.2% and 0.5%. Attention: When using a water sealed bell jar for exhaust calibration, it is necessary to consider the possible errors caused by water vapor condensation when the temperature of the flowmeter being tested is lower than the water temperature. In practical applications, it is necessary to select an appropriate calibration method based on factors such as the usage scenario, fluid type, and calibration requirements of the vortex flowmeter.
2. Introducti
Vortex flow meter is researched and produced based on the Karman vortex principle, mainly used for flow measurement of industrial pipeline media fluids, such as gas, liquid, vapor and other media.
. Below, we will introduce the principle and other related characteristics of vortex flowmeter for your reference.1. Working Principle: A vortex flowmeter is a type of flowmeter designed and manufactured using the Karman vortex principle and contemporary electronic technology. The frequency of vortex generation is proportional to the velocity of the fluid, and under certain conditions, it satisfies the following equation: f=St * v/d (where f: vortex generation frequency v: flow velocity d: triangular column width St: Strouhal number). The fluid vortex generates alternating pressure on the triangular column, which is detected by a piezoelectric signal sensor as an electrical signal and amplified by a preamplifier to become a standard electrical signal output.
. The VA series vortex flowmeter can measure the volume of a wide range of gases (including steam) and liquids, and can be paired with a flow accumulator and temperature and pressure sensors for mass calculation and various parameter display.2. Characteristics
1. The structure is simple and sturdy, with no movable parts, high reliability, and very reliable for long-term operation.
.2. Easy installation and convenient maintenance.
3. The detection sensor does not directly contact the measured medium, with stable performance and long service life. 4. The output is a pulse signal proportional to the flow rate, with no zero drift and high accuracy. 5. Wide measurement range, with a range ratio of up to
Hot Product
Related AD
