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The scope and characteristics of the use of cross-sectional flow meters
The cross-sectional airflow measurement device is a flowmeter developed based on the principle of velocity area method
Product details
The cross-sectional air flow measurement device is a flowmeter developed based on the principle of velocity area method. The velocity area method divides the cross-section for measuring flow velocity into many small units. Assuming the flow velocity Vi of each unit area, the total flow rate is equal to the sum of the flow rates through all small unit areas. The more the unit area is divided, the more accurate the measured flow rate, and the cross-sectional air volume measurement device is developed based on this principle.
Scope of use:
1. Nominal diameter: Circular pipeline: 200mm ≤ DN ≤ 6000mm
Rectangular pipeline: 200mm × 200mm ≤ DN ≤ 6000mm × 6000mm
2. Nominal pressure: PN ≤ 6.4MPa
3. Medium temperature: t ≤ 450 ℃ (please specify when ordering if>450 ℃)
4. Accuracy level: Level 1, Level 1.5, Level 2.5
5. Reynolds number: ReD>2.5 × 105. Structural form: rectangular duct cross-sectional air flow measurement device: divide the long and short sides of the rectangular duct into several equally sized small units on average according to the principle of equal length,
Measure the flow velocity at the center point of each small unit, and then average the sum of the flow velocities of the small units to obtain the average flow velocity of the entire large cross-sectional area.
Prototype pipeline cross-sectional air flow measurement device: Divide the circular pipeline section into several concentric rings of equal area (with the center as the circle), measure the flow velocity of each ring, and then average the flow velocity of all rings (including the center circle), that is
Obtain the average flow velocity of the circular cross-section.
Main features:
1. No straight pipe section is required, as long as there is an installation position of 250mm to 300mm in length.
2. The outflow coefficient is stable and does not require calibration.
3. Low pressure loss and small volume.
4. A blowing device can be installed to achieve manual or automatic blowing.
5. It can measure the flow rate of pipelines with special structural shapes.
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