Flow meter

Electromagnetic flowmeters operate based on Faraday’s law of electromagnetic induction and are used exclusively for conductive liquids (conductivity ≥ 5 μS/cm). In the chemical industry, the core focus of selection revolves around medium compatibility, operating conditions, accuracy/signals, installation/explosion-proof requirements, and structural/functions. Below are practical selection rules specifically for chemical industry scenarios. 1. Prerequisites: Determining Medium […]

Orifice flow meters dominate the industrial steam flow measurement field due to their simple structure, high reliability, and wide applicability. However, the high temperature and phase-change characteristics of steam present significant challenges in the stable transmission of differential pressure signals. As a key component in the pressure pipe system, the proper setup of the condensate

The working principle of electromagnetic flow meters is based on Faraday’s Law of Induction: when a conductive fluid flows through a magnetic field, it cuts through the magnetic flux lines, generating an induced electromotive force (EMF). The magnitude of this EMF is proportional to the flow velocity, which is then used to calculate the flow

1. Core Principle (Kármán Vortex Street) When fluid flows past a non-streamlined vortex generator, alternating vortices are formed on either side, arranged in a regular pattern (Kármán Vortex Street). Vortex shedding frequency: f=St×vdf = St times frac{v}{d} StSt : Strouhal number (approximately 0.16–0.22, stable within Reynolds number 2×1032 times 10^3  to 7×1067 times 10^6 )

Choosing the right flowmeter is a critical decision that directly affects the accuracy, reliability, and efficiency of your flow measurement process. Here’s a comprehensive guide to help you select the appropriate flowmeter for your application. 1. Fluid and Operating Conditions (The Foundation of Selection) Accurate fluid characterization and working conditions are key to determining the

1. Introduction A Differential Pressure Flow Meter (DP Flow Meter) measures flow rate by detecting the pressure difference generated by a primary element installed in a pipeline. The flow rate is calculated based on: Measured differential pressure Known fluid properties Geometric dimensions of the primary element and pipe A typical DP flow measurement system consists

1. Abnormal Cumulative Flow in Mass Flow Meter Troubleshooting: A mass flow meter at a plant showed cumulative flow even when there was no process flow. Upon inspection, it was found that the supports at both ends of the sensor did not meet installation requirements. Specifically, the support distances were uneven, and the bottom of

Thermal mass flow meters, commonly used for measuring the mass flow rate of gases or small amounts of liquids, may experience significant fluctuations, leading to unstable readings that can impact process control. The causes of such fluctuations should be investigated from multiple aspects, including the properties of the medium, instrument installation, equipment parameters, and external

1. Issue: Display of the 8800D Saturated Steam Flowmeter Shows Low Readings Fault Diagnosis: This was a newly installed meter. Upon rechecking the settings, it was found that the flow measurement unit was set incorrectly— the range upper limit of 16,000 kg/h was mistakenly set to 16,000 m³/h. Fault Resolution: After correcting the range upper

A Practical Troubleshooting Case Study In industrial steam measurement systems, discrepancies between sub-meters and the main flow meter are not uncommon. One particularly confusing situation is when the branch flow meter shows a stable flow rate, while the main meter continuously indicates zero flow. Is this a sensor failure?A wiring problem?Or is the issue hidden