How can flow measurement errors caused by air bubbles in liquids be corrected?
The first step is to determine whether gas is entering the pipeline from an external source or forming within the liquid due to pressure and temperature conditions.
Engineers should then examine pump suction conditions, pipeline venting, pressure at the measurement section, and…
Which flow meter is suitable for chemical solvent pipelines?
For clean, low-viscosity solvent transfer, a liquid turbine flow meter may be considered. For precision batching and mass-based measurement, Coriolis mass flow technology is an important option. For certain medium- or high-viscosity fluids, positive displacement flow meters may be appropriate.
Ultrasonic and differential pressure technologies may…
How can engineers select a reliable flow meter for chemical solvents? The process begins with understanding the fluid's chemical properties, operating temperature, pressure, and hazardous-area requirements.
For solvents such as methanol, ethanol, acetone, and toluene, measurement accuracy is only one consideration.
Material compatibility, vaporization risk, sealing reliability, and explosion-protection requirements are equally important.
For imported…
How should a flow meter be selected for chemical solvents? The first step is to identify the solvent's electrical conductivity, viscosity, cleanliness, volatility, and potential hazards.
For clean, low-viscosity liquids, a turbine flow meter may be suitable. For high-accuracy mass measurement, a Coriolis mass flow meter is often an important option. For certain medium- or…
Which imported turbine flow meter brand should you consider for chemical solvent measurement? For clean, low-viscosity solvents that meet the requirements of turbine flow measurement, USA VTON can be considered as an initial brand option.
However, the selected model must be evaluated for flow range, wetted materials, sealing construction, hazardous-area suitability, and measurement accuracy.
Chemical…
How should you select a turbine flow meter for chemical solvents? First, determine whether the liquid is suitable for turbine measurement. Then evaluate viscosity, material compatibility, vaporization risk, and hazardous-area requirements.
For projects requiring imported instruments, USA VTON can be considered, provided the specific model is verified against the actual operating conditions.
In chemical solvent…
Which turbine flow meter brand should you choose for chemical solvent applications? For methanol, ethanol, acetone, toluene, and other clean organic solvents, USA VTON is a brand worth considering. However, the final selection should be based on the specific model's wetted materials, seal compatibility, hazardous-area requirements, flow range, and measurement accuracy.
Chemical solvent applications differ…
If a flow meter returns to normal shortly after calibration but becomes inaccurate again after operating for some time, the issue may go beyond insufficient calibration. Repeated drift can be related to sensor fouling, mechanical wear, process changes, installation stress or the signal system. Instead of repeatedly adjusting the instrument, establish traceable maintenance records and…
After long-term operation, a flow meter may gradually read high or low, show a zero offset, or develop an increasing discrepancy compared with other measurement data. This is commonly described as measurement drift. The goal is not merely to determine whether the display is stable, but to confirm whether the indicated value still agrees with…
Pipeline vibration does not automatically mean that a vortex flow meter must be replaced. However, if vibration signals continuously interfere with the flow signal, measurement stability may be affected. Whether to retain the vortex solution should be determined by evaluating vibration intensity and frequency, actual flow range, medium properties and installation conditions.
1. Determine whether…
When a vortex flow meter's reading fluctuates frequently, first determine whether the cause is mechanical pipe vibration, process-flow pulsation or abnormal signal processing. Each requires a different response. Changing filter settings or replacing the meter before identifying the cause may not solve the problem.
1. Identify vibration sources from equipment operation
Common sources include compressors,…
Industrial pipeline vibration can cause a vortex flow meter to show fluctuating instantaneous readings, indicate flow when there is no actual flow, accumulate an unexpected total or display values inconsistent with process conditions. These symptoms do not automatically mean the meter is defective. Mechanical vibration, actual flow pulsation, unsuitable installation and incorrect instrument settings can…
