Variable diameter flowmeter| Fuzhou water flow meter manufacturer

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1. What does the variable diameter of a flowmeter mean?

Variable diameter, changing the diameter. Some flowmeters are pipeline type, with flanges on both ends of the flowmeter, and the flowmeter body is part of the pipeline. At this point, for example, if the pipeline is DN100, you can choose a flow meter with a diameter of DN80. After a transition, you need to change the diameter. The specific method is to add variable diameter flanges at both ends and the big and small ends. Due to the correlation between the flow rate of Fansun and the cross-section of the pipeline, many types of flow meters with front-end chains require the setting of variable diameter parameters.

How to deal with DN40 flowmeter for DN100 pipeline?

How to deal with DN40 flow meters for DN100 pipelines? See the diagram below:

1. Add two 100x40 variable diameters

2. There should be enough straight pipe dry running section (usually 15d) in front of the meter.

3. What is the reason for negative flow meter pressure?

Flow meter pressure display is usually caused by three types of problems: measurement system, process system, or instrument failure.

. one Measurement system issue ① Zero drift: After long-term use of the flowmeter, the sensor may experience zero drift, causing a change in t Variable diameter flowmeter

he starting measurement point and displaying negative pressure. ② Improper installation: If the installation position vibrates violently or the pressure port is blocked, it may interfere with sensor data and cause negative values. two Problem with the Gongyu Zhaoyi system: ① Abnormal fluid flow: When the pipeline suddenly changes diameter or the valve quickly closes, the fluid forms vortices or local negative pressure, manifested as negative pressure. ② System suction phenomenon: If there is a vacuum pump or other equipment running in the system, the pressure in the suction area may be lower than atmospheric pressure, resulting in negative display. three Instrument malfunction ① Sensor damage: When the sensor is damaged due to aging, corrosion, or external forces, the measurement may be inaccurate and negative pressure values may occur. ② Signal transmission issues: Short circuits, open circuits, or poor contacts in the circuit can cause signal distortion, resulting in incorrect negative values being displayed. During processing, step-by-step troubleshooting can be carried out: first check the installation and pressure port status, then observe whether there are suction or flow abnormalities in the system, and finally verify whether the instrument itself is faulty by calibrating or replacing the sensor.

Variable diameter flowmeter

1. What does the variable diameter of a flowmeter mean?

How to deal with DN40 flowmeter for DN100 pipeline?

3. What is the reason for negative flow meter pressure?

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