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1. What are the requirements for the front and rear straight pipe sections of ABBs mass flowmeter?
The default is the Coriolis mass flowmeter, and the thermal mass should still require a straight pipe section!!
2. Why is my float flowmeter compared to Alicat mass flow?
Flow can be divided into three forms based on flow formulas or measurement units: volumetric flow: flow expressed in volume/time or volume/time.
. For example: m ³/h, l/h Volume flow rate (Q)=Average flow velocity (v) × Pipeline cross-sectional area (A) Mass flow rate: Flow rate expressed in mass/time. For example, kg/h mass flow rate (M)=medium density (ρ) × volume flow rate (Q)=medium density (ρ) × average flow velocity (v) × pipeline potato and eggplant cross-sectional area (A) weight flow rate: flow rate expressed in force/time. For example, kgf/h weight flow rate (G)=medium density (γ) × volume flow rate (Q)=medium density (ρ) × gravitational acceleration (g) × volume flow rate (Q)=gravitational acceleration (g) × mass flow rate (M). Mass flow meters and float flow meters measure mass mass flow rate (which can be converted to other forms of display). But the difference is that mass flow meters directly measure density, while the density of float flow meters is artificially given based on operating conditions during design; When the temperature and pressure of the medium change, the density also changes. At this point, the mass flow meter, due to the direct collapse of the hand to measure density, still produces "accurate" measurement results, while the float flow meter, due to the deviation of density from the design value, will produce measurement errors. So, when both the mass flowmeter and the float flowmeter are "accur_600x400.jpg)
3. Types and Differences of Flowmeters
Flowmeters are mainly divided into volumetric, velocity, differential pressure, mass, and other categories based on their measurement principles. The core differences lie in their working principles, applicable dielectric properties, and accuracy characteristics.
. 1. Working principle of volumetric flowmeter: The fluid is divided into fixed volume units by mechanical measuring elements, and the flow rate is calculated by counting the number of units. Representative types: elliptical gear, waist wheel, scraper flowmeter. Applicable medium: high viscosity liquids (such as oils, chemical reagents). Accuracy: ± 0.2%~± 0.5% (higher). Characteristics: Sensitive to changes in fluid viscosity, filters need to be installed to prevent jamming. Working principle of velocity flowmeter: flow rate is derived by measuring fluid velocity, usually requiring matching pipeline size data. Representative type: • Electromagnetic flowmeter: Based on Faradays law of electromagnetic induction, it measures conductive liquids (such as water, acidic and alkaline solutions) with an accuracy of ± 0.2%~± 0.5% and no pressure loss. Turbine flowmeter: By driving the turbine to rotate with fluid, it measures low viscosity liquids or gases (such as tap water and natural gas) with an accuracy of ± 0.5%~± 1%, requiring a straight pipe section. • Ultrasonic flowmeter: uses the time difference of