Venturi As Cast
FLOW MEASUREMENT
Description
For a better precisionSolder (BW) or flanged connection Material: Standard: carbon steel, stainless steel, others according to your application.
- Gold and silver plating - steels and metals
- Venturi Cast
- Flanged Venturis
Product characteristics
- Standards
- ISO 5167-1 & 4, ASME MFC-3M
- Fluid
- liquid, gas, steam
- Accuracy
- 0.7% of max flow
- Repeatability of the measurement
- 0.1%
- d/D
- 0.30 ≤ β ≤ 0.75
- Roughness at the throat
- Ra ≤ 10⁴.d
- Roughness input and convergent cylinder
- Ra ≤ 10⁴.D
- Minimum inlet cylinder length
- l = D or (0.25.D + 250mm)
- Convergent input length
- l' = 2,7.(D - d)
- Convergent angle of entry
- α = 21 ° ± 1 °
- Throat length
- lc = d ± 0,03.d (minimum value = d/3)
- Diverging angle of exit
- 7° ≤ φ ≤ 15°
Documents
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The venturi tube has a convergent inlet, a throat and a divergent outlet. It is a differential pressure flow meter well known to create a low permanent pressure drop; thus, it is suitable for measuring, for example, a low pressure flow rate. More over, it requires short upstream and downstream straight lengths. There are different types of venturi tubes : the machined venturi made from a solid round for small size parts, the rolled welded venturi made from sheet metal for larger pieces up to 1200 mm diameter and the venturi "as cast" allowing a better accuracy up to 800 mm diameter.
