How to correctly read PVC flowmeter | PVC pipeline type float flowmeter

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1. Parameters required for selection of vortex flowmeter

The parameters required for selection of vortex flowmeter are as follows: the name and type of the measured medium should be clearly stated in the measured medium information. If the medium is a mixed gas, the volume percentages of each component must be provided, such as the mixing ratio of oxygen and nitrogen, to ensure the adaptability of the flowmeter to the characteristics of the medium. Working pressure: The pressure value of the medium under normal operating conditions. Maximum and minimum pressure: the limit values of medium pressure fluctuations, used to evaluate the pressure resistance range and stability of flow meters. For example, if the pressure fluctuation range of the medium is 0.5-1.5 MPa, it is necessary to ensure that the flow meter range covers this range. Medium temperature parameter working temperature: the temperature value of the medium under normal operating conditions. Maximum operating temperature: The highest temperature that the medium may reach, taking into account the impact of extreme operating conditions on the flowmeter sensor and materials. For example, high-temperature steam requires the selection of high-temperature resistant vortex flowmeter. Maximum flow rate range of medium: The flow rate value of the medium under peak operating conditions determines the upper limit of the flowmeter range. Common flow rate: The flow rate value of the medium under normal operating conditions, which is randomly used to optimize the linear measurement range of the flowmeter. Minimum flow rate: The flow rate value of the medium under low load conditions, ensuring that the flowmeter can maintain accuracy at low flow rates. For example,

if the commonly used flow rate is 50m3/h, it is necessary to avoid selecting a model with a large range that may cause measurement errors. Pipeline conditions and pipeline size: The inner and outer diameters of the pipeline need to be provided to ensure that the flowmeter matches the physical dimensions of the pipeline. Pipeline materials, such as carbon steel, stainless steel, PVC, etc., affect the installation method and compatibility of flow meters. Form of flow obstruction: It is necessary to indicate whether there are contraction pipes, expansion pipes, elbows (single elbows, same plane/different plane double elbows), valves, T-shaped branch pipes, etc. in the pipeline. These structures will affect the fluid state and measurement errors need to be compensated by correction factors. Pipeline vibration situation: divided into three levels: no vibration, slight vibration, and strong vibration. Vibration can interfere with the stability of vortex signals, and anti vibration flow meters or vibration reduction devices need to be selected or installed. Upstream and downstream pipeline length: The length of the straight pipe section upstream and downstream of the flowmeter installation location needs to be provided. Generally, the length of the upstream straight pipe section is required to be 15-20 times the diameter of the pipeline, and 5-10 times the downstream to ensure stable fluid flow. For example, a DN100 pipeline requires a 1.5-2-meter straight pipe section upstream. Output signal requirements: Select the output signal type according to system requirements: pulse signal: suitable for cumulative flow measurement or long-distance transmission. 4-20mA current signal: suitable for control systems with analog input, stro

How to correctly read PVC flowmeter | PVC pipeline type float flowmeter

1. Parameters required for selection of vortex flowmeter

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