Principle of nozzle flowmeter | What are the differences between nozzle flowmeter and orifice flowmeter

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1. Installation method and precautions for nozzle flowmeter

Installation method and precautions for nozzle flowmeter: The installation of nozzle flowmeter is mainly based on its measurement principle, that is, when the fluid flows in the pipeline, due to the local resistance of the standard nozzle, the pressure of the fluid decreases and energy is lost. This phenomenon is thermodynamically called throttling phenomenon. When the pressure difference between the front and rear of the pipeline is large during installation, the method of adding standard nozzles should be used. This installation method is simpler than using a regulating valve, but it is necessary to choose a suitable nozzle flowmeter to avoid liquid cavitation and ensure the safe operation of the pipeline. Installation requirements: Easy to implement separate grounding of the sensor location: To ensure accurate measurement and stable operation of the nozzle flowmeter, a location that is easy to implement separate grounding of the sensor should be selected for installation to avoid electromagnetic interference. Avoid direct sunlight: Prolonged direct sunlight exposure may cause aging or performance degradation of internal components of the nozzle flowmeter, so it should be avoided as much as possible to install in places with direct sunlight. Meet the requirements of the front and rear straight pipe sections: The installation of the nozzle flowmeter should meet the requirements of not less than 5D (D is the pipe diameter) and 2D for the front and rear straight pipe sections respectively, to ensure the stability of fluid flow and the accuracy of measurement. Avoid corrosive gas environment: The nozzle flowmeter should avoid places with high concentrat

ions of corrosive gases in the surrounding environment as much as possible to prevent corrosion from damaging the flowmeter. Avoid negative pressure inside the measuring tube: When installing a nozzle flowmeter, it should be ensured that the measuring tube does not become negative pressure to avoid damage to the flowmeter or affecting measurement accuracy. Choose a location that will not cause phase separation: When measuring mixed phase fluids, a location that will not cause phase separation should be selected for installation to ensure measurement accuracy. Avoid installing the nozzle flowmeter downstream of uneven mixing: When measuring two-component liquids, it should be avoided to install the nozzle flowmeter downstream of uneven mixing to prevent measurement errors caused by uneven mixing. Choose a location with low vibration: The installation of nozzle flow meters should choose a location with low vibration, especially for integrated instruments, to reduce the impact of vibration on measurement accuracy. Installed downstream of the fully completed reaction section: When measuring chemical reaction pipelines, the nozzle flowmeter should be installed downstream of the fully completed reaction section to ensure that the measured fluid is a stable reaction product. Avoid large motors, transformers, etc. nearby: The installation of nozzle flow meters should avoid strong electromagnetic interference sources such as large motors and transformers nearby to prevent nozzle field interference and affect measurement accuracy. Precautions: Before installing the nozzle flowmeter, carefully check the model, specifications, and measurement range of the flowmeter to ensure it matches the pipeline system. During the installation pr

Principle of nozzle flowmeter | What are the differences between nozzle flowmeter and orifice flowmeter

1. Installation method and precautions for nozzle flowmeter

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