Principle of nozzle flowmeter | The fundamental difference and function between nozzle flowmeter and orifice flowmeter

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1. Will the flowmeter record the flow rate value after the nozzle is blocked?

Whether the flowmeter records the flow rate value after the nozzle is blocked depends entirely on the installation position and detection principle of the flowmeter, and there is no unified positive or negative result.

1. Installation of flowmeter upstream of nozzle 1 This type of flowmeter monitors the total fluid flow in the upstream pipeline. As long as the upstream fluid supply equipment (such as pumps and compressors) is still running, there will be fluid flow in the pipeline. The flowmeter will collect and output the flow rate value of the bridge leg normally. Only the reading at this time represents the fluid throughput of the upstream pipeline, not the actual effective flow rate through the nozzle. The flowmeter will only stop recording the flow rate when the upstream pipeline is completely pressurized and the fluid is completely cut off due to nozzle blockage (such as pump shutdown or upstream main valve closure).

2. When the flowmeter is installed downstream of or integrated with the nozzle.

2. What are the common types of flow meters (with applicable scope)? The common types and applications of flow meters are as follows: Electromagnetic flow meters work based on Faradays law of electromagnetic induction. Scope of application: Mainly used in sewage treatment. Working principle of elliptical gear flowmeter: When the measured liquid enters the flowmeter through the pipeline, the pressure difference generated at the inlet and outlet drives a pair of gears to rotate continuously, continuously conveying the liquid measured by the initial lunar cavity to the outlet. The product of the number of revolutions of the elliptical gear and four times the displacement per time is the total flow rate of the measured liquid. Scope of application: Suitable for flow measurement work in industrial sectors such as chemical, petroleum, pharmaceutical, power, metallurgy, and food. Working principle of a rotary flowmeter (float flowmeter): In a vertical conical tube that expands from bottom to top, the gravity of the circular cross-section float is supported by liquid dynamics, and the float can freely rise and fall inside the conical tube. Under the action of flow velocity and buoyancy, it moves up and down, and after balancing with the weight of the float, it is transmitted through magnetic coupling to indicate the flow rate on the dial. Scope of application: Suitable for departments such as chemical, petroleum, light industry, medicine, environmental protection, food and metrology testing, scientific research, etc., to measure the flow rate of single-phase non pulsating fluids. The working principle of vortex flowmeter is to measure the flow rate based on the principle of fluid oscillation. Job characteristics: The structure is

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