Selection of small flow flowmeter

『Selection of small flow 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)

What are the optional size specifications for methanol flow meters? The mainstream size specifications for methanol flow meters cover DN15~DN2000, which need to be determined based on the type of flow meter, operating flow rate, and pipeline parameters.

1. General size selection interval 1 Small flow scenarios: DN15~DN50, suitable for small diameter conveying scenarios such as sampling pipelines and small filling lines in workshops; 2. Medium flow scenario: DN65~DN300, which is the mainstream fitting size for the methanol main pipeline in the factory area; 3. High flow scenarios: DN350~DN2000, suitable for ultra large caliber working conditions such as dock unloading and long-distance methanol pipelines.

2. Size adaptation limitations for different types of flow meters: (1) Vortex flow meters: suitable for DN15~DN300, measurement accuracy will significantly decrease after exceeding DN300, and can only be used for measuring volume in non-conductive media (such as anhydrous methanol);

; （2） Electromagnetic flowmeter: suitable for DN10~DN2000, but can only be used for measuring industrial methanol containing trace conductive impurities. Anhydrous methanol cannot be used; （3） Coriolis mass flowmeter: suitable for DN10~DN300, with the highest measurement accuracy, mostly used in trade settlement scenarios, and relatively high cost; （4） Rotary flowmeter: only suitable for small flow sampling and measurement of DN15~DN50, mostly used in laboratories or trace conditions.

III. Selection and Use Constraints 1 Flow range constraint: It is necessary to ensure that the actual working flow rate is within the optimal range ratio range of the selected flow meter (usually 10%~100% of the rated flow rate), in o

rder to avoid accuracy failure at low flow rates; 2. Medium adaptation constraints: Anhydrous methanol should avoid electromagnetic flow meters and use instruments such as vortex street and Coriolis mass flow meters that are adapted to non-conductive media. The corresponding size range should be adjusted according to the type of flow meter; 3. Safety installation constraints: Methanol is a flammable chemical medium, and the installation of flow meters should be completed by personnel with chemical pipeline operation qualifications to avoid safety risks caused by medium leakage.

2. How to choose a flow meter when measuring liquids?

When selecting a flow meter for measuring liquids, it is necessary to consider the characteristics of the medium, measurement parameters, installation conditions, and functional requirements, and match them with the applicable scenarios of different types of flow meters. The specific selection steps and applicability of various types of flow meters are as follows:

First, clarify the core parameters. Users need to provide the following parameters to narrow down the selection range: medium type: conductivity, corrosiveness, cleanliness (such as water, ammonia water, sewage, chemical raw materials, alcohol, deionized water, etc.). Physical properties of the medium: temperature, density, viscosity (affecting fluid fluidity and flow meter response). Pressure range: Flow meters with pressure resistant design should be matched for high or low pressure environments. Flow range: minimum flow, common flow, maximum flow (determining flow meter range and accuracy). Pipeline diameter: The flowmeter needs to match the pipeline size to avoid installation issues. Functional requirements:

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