Dual Venturi gas flowmeter

plug-inDual Venturi gas flowmeterThe basic measurement principle of the new generation differential pressure flow measurement instrument is a flow measurement method based on the law of conservation of energy - Bernoulli equation and flow continuity equation. The Neiwen Qiu Li tube is composed of a circular measuring camp and a special type of body that covers the measuring camp and is coaxial with the observation tube. The radial outer surface of the special core has a geometric corridor shape similar to the inner surface of the classical Venturi tube, and forms a reducing annular flow gap with the inner surface of the measuring tube. The throttling process of fluid flowing through an inner Venturi tube is basically similar to the throttling process of fluid flowing through a classical Venturi tube and an annular orifice plate. The structural characteristics of the inner tube make it free from the iron edge abrasion and fouling problems similar to orifice plate throttling components during use, and can effectively adjust the flow gradient and possible non axisymmetric velocity distribution inside the tube before throttling, thereby achieving high-precision and high stability flow measurement.

3、 Characteristics

1. High measurement accuracy and good reproducibility.

2. Stable and reliable work, strong anti-interference ability.

3. Low requirements for straight pipe sections.

4. No movable parts, small blocking components, low power consumption, and large range ratio.

5. Large differential pressure value, good stability, high reliability, and easy installation and maintenance.

6. Full range dynamic correction is possible.

8. The inner surface of the measuring sensor has undergone anti-wear treatment, greatly improving the product's service life.

4、 Main technical parameters

1. Applicable media: air, steam, natural gas, coal gas, flue gas, water and other media.

2. Working pressure: PN=-20kPa~6.5MPa.

3. Working temperature: -40 ℃ to 400 ℃.

4. Flow (velocity) measurement range: 0.5-60m/s;

5. Accuracy level: ± 1.0%, ± 1.5%.

6. General requirements for straight pipe length: Front (upstream) straight pipe length: L1=0.7D-1.5D, Rear (downstream) straight pipe length: L2=0.5D-1D.

7. Nominal diameter: 300 ≤ D ≤ 7000mm

8. Installation method: plug-in flange connection