Balanced (Multi-orifice) Flow Sensor — BF00
BF00 balanced flow sensor improves on conventional throttling devices with a multi-functional-orifice plate that rectifies the flow field into an almost ideal profile, delivering 5–10× better accuracy than an orifice plate. Suitable for nearly all fluids, bidirectional flow and heavy-duty industrial service.
Specifications
| Accuracy | ±0.50 % rate (special ±0.30%) |
| Repeatability | 0.15 |
| Beta ratio (β) | 0.20 – 0.82 |
| Nominal size | DN15 – DN1000 mm or larger |
| Working pressure | Up to 42 MPa |
| Working temperature | Up to 850 °C |
| Turndown | 10:1, up to 30:1 |
| Straight run | Typical 0.5D upstream / 0.5D downstream |
| Media | Gas, liquid, steam, wet gas, slurry, two-phase |
Details
Working Principle
Like all DP devices it follows the Bernoulli principle in a sealed pipe: flow is proportional to the square root of the differential pressure (Qv = K × C × √ΔP). The multi-hole disc is a throttling and flow-conditioning element; each hole's size and position is custom-calculated (functional orifices). As fluid passes through, the flow field is balanced and re-rectified, vortices are minimized, and a stable DP signal is obtained for volumetric or mass flow calculation.
Key Features
- Accuracy improved 5–10× over an orifice plate, repeatability 0.15%
- Short straight-run: as little as 0.5D upstream / 0.5D downstream
- Permanent pressure loss only ~1/3 of a standard orifice plate; pressure recovery 2× faster
- Works at low Reynolds number (<200) to very high (>10⁷)
- Direct drop-in replacement for existing orifice plates, no piping changes
- Dirty-media friendly: many holes self-clean, resistant to blockage
- High temperature (≤850 °C) and pressure (≤42 MPa), no moving parts
Connection Types
| Model | BF00-10 | BF00-11 | BF00-12 | BF00-13 | BF00-14 |
|---|---|---|---|---|---|
| Connection | Flat welding flange | Slip-on flange | Weld-neck flange | Wafer | Direct pipe welding |
| Size range | DN15–1000+ | DN15–1000+ | DN15–1000+ | DN15–1000 | DN15–1000+ |
| Pressure class | ANSI150 (PN0.25–2.5) | ANSI150–300 (PN0.25–5.0) | ANSI150–2500 (PN0.25–42) | ANSI150 (PN0.25–2.5) | ANSI150–2500 (PN0.25–42) |
| Media | Gas, liquid, steam | Gas, liquid, steam | Gas, liquid, steam | Gas, liquid, steam | Gas, liquid, steam |
Dimensions (BF00-10 plate-flat welding flange)
| DN | L (mm) | B (mm) | D (mm) | C (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 15 | 200 | 48 | 15 | 55 | 6 |
| 20 | 200 | 48 | 20 | 55 | 7 |
| 25 | 200 | 48 | 25 | 55 | 7 |
| 32 | 200 | 48 | 32 | 55 | 7 |
| 40 | 200 | 48 | 40 | 80 | 7 |
| 50 | 250 | 73 | 50 | 80 | 9 |
| 65 | 250 | 73 | 65 | 95 | 11 |
| 80 | 250 | 73 | 80 | 110 | 16 |
| 100 | 300 | 98 | 100 | 130 | 20 |
| 125 | 300 | 98 | 125 | 155 | 28 |
| 150 | 300 | 123 | 150 | 180 | 39 |
| 200 | 350 | 148 | 200 | 230 | 50 |
| 250 | 400 | 173 | 250 | 270 | 94 |
| 300 | 500 | 223 | 300 | 320 | 111 |
| 350 | 500 | 223 | 350 | 370 | 144 |
| 400 | 600 | 273 | 400 | 420 | 167 |
| 450 | 600 | 273 | 450 | 470 | 233 |
| 500 | 600 | 273 | 500 | 520 | 244 |
| 600 | 600 | 273 | 600 | 620 | 278 |
| 700 | 700 | 323 | 700 | 720 | 389 |
| 800 | 800 | 373 | 800 | 820 | 500 |
| 900 | 900 | 423 | 900 | 920 | 611 |
| 1000 | 1000 | 473 | 1000 | 1020 | 778 |
Installation
- Straight-run: 0.5D upstream, 0.5D downstream
- Horizontal pipe: integral (gas; liquid or steam) or remote mounting
- Vertical pipe: integral or remote mounting for liquid, gas or steam
- Tapping options: corner, flange, ring, 1/2-in threaded, integral, high-temperature integral