Venturi Tube Flow Sensor — BF05
BF05 Venturi tube is a standard throttling DP device developed from the Venturi effect. Its tapered geometry is free from the sharp-edge wear and fouling that plague orifice plates, and actively re-rectifies the velocity profile for high-stability measurement — ideal for dirty media and large lines at high pressure and temperature.
Specifications
| Accuracy | ±0.50 |
| Repeatability | 0.15 |
| Turndown | 10:1 or wider |
| Beta ratio (β) | 0.30 – 0.75 |
| Nominal size | DN15 – DN2000 mm |
| Working pressure | Up to 42 MPa |
| Working temperature | Up to 850 °C |
| Straight run | 3D upstream / 1D downstream |
| Reynolds range | 2×10⁵ – 2×10⁶ |
Details
Working Principle
Measurement is based on energy conservation (Bernoulli equation) and the continuity equation: Qv = K × C × √ΔP, Qm = Qv × ρ. The Venturi consists of a circular measuring tube and a coaxial profiled core; the annulus between them behaves like the throat of a classical Venturi, throttling the flow similarly to a classic Venturi or annular orifice while conditioning the upstream velocity profile.
Key Features
- High accuracy ±0.50%, repeatability 0.15%
- Short straight-run with low permanent pressure loss
- No sharp-edge wear or fouling; long-term stability without recalibration (β constant)
- Dirty-media friendly: liquids, gases, steam and two-phase
- High temperature (≤850 °C) and pressure (≤42 MPa)
- Recast, machined and welded-steel contraction sections for DN15–DN2000
Applications
Gas, liquid, steam & two-phaseDirty / abrasive mediaLarge-diameter linesNatural gasChemical & petrochemical
MOQ
1 unit
Lead Time
1–4 units: 20–30 days
Packaging
Wooden case
Warranty
12 months
Certification
CE