Steam Vortex Flow Meter
Saturated & Superheated Steam Build
Accuracy of ±0.5% VRd
Temperature service up to 350 °C
Turndown ratio of 1:70
- Line sizes DN15 to DN600
- Flange ratings PN16 to PN100 (ANSI 150 to 1500 LB)
- Body materials 316L stainless or Hastelloy C
The Steam Vortex Flow Meter measures saturated and superheated steam on boiler headers, CHP feeds, and process mains DN15–DN600. Vortex-shedding off the bluff body; ±0.5 % VRd, 1:70 turndown.
Built-in T+P outputs mass flow in kg/h, no external flow computer. 316L wetted parts; above 350 °C see High-Temperature Vortex model. CNEX Ex d IIC T6 Gb optional. 5–7 days from factory.
Benefits
Six spec-led proof points that decide a steam vortex specification.
- VRd accuracy: LUGB-VRd ±0.5 %, 1:70 turndown; saturated and superheated header billing.
- Built-in T+P compensation: integrated RTD + pressure transducer feed the on-board flow computer; steam mass flow in kg/h, no external multivariable.
- 316L wetted parts: standard 316L; Hastelloy C upgrade for chloride or amine-treated condensate.
- Temperature ceiling: T2/T3/T4 codes lock 350/400/500 °C; spec above peak operating T, not at it.
- Hazardous-area certification: CNEX Ex d IIC T6 Gb optional; IP65/66/67 + EMC 2014/30/EU standard.
- Lead time: 5–7 business days from factory with ISO 9001 cert.
Quick specifications.
The 8 numbers most procurement teams check first.
| Parameter | Specification |
|---|---|
| Nominal Diameter | DN15 – DN600 (½″ to 24″) |
| Process Media | Saturated steam (dryness >85%), superheated steam, single-phase fluids |
| Accuracy | ±0.5% / ±1.0% / ±1.5% (configurable) |
| Turndown Ratio | 1:10 to 1:70 |
| Process Temperature | −45 °C to +350 °C standard (up to +500 °C optional) |
| Pressure Class | 1.6 MPa to 10 MPa standard (up to 100 MPa custom) |
| Output Signal | 4-20 mA · HART · RS485 Modbus-RTU · Pulse · GPRS IoT |
| Hazardous Area | IP65/66/67 / CNEX Ex d IIC T6 Gb (flameproof, Zone 1) |
Configure your build.
Select your specs; we’ll generate a model code and ballpark price. Submit to engineering for verified sizing within 4 business hours.
Your Configuration
✓ No payment until quote accepted
✓ Engineers verify sizing & flow range
✓ Reply within 4 business hours
Typical applications
Four common deployments where the LUGB Series replaces orifice plates and Coriolis meters at a fraction of the cost.
Industrial Boiler Houses
Distribution headers from gas, biomass, or coal-fired boilers. Wide turndown handles morning ramp-up to full load.
CHP & Cogeneration
Process steam to district heating loops and CHP plants. ±1.0 % mass-flow supports tighter departmental billing.
Food & Beverage Plants
Process steam to retorts, evaporators, sterilizers. Sanitary clamp connections + 316L for clean circuits.
Chemical & Petrochemical
Reactor steam jackets, reboilers, stripping columns. Hastelloy options for corrosive condensate.
Specifications
Pulled directly from the LUGB factory datasheet; no marketing rounding.
Performance
| Accuracy; Steam | ±0.5% / ±1.0% / ±1.5% |
| Turndown Ratio | 1:10 – 1:70 (1:70 on LUGB-VRd) |
| Reynolds / Velocity | 1×10⁴ – 7×10⁶ Re · 2 – 70 m/s gas/steam |
| Pressure loss | ΔP = 1.29 × ρ × V² Pa · Cd ≤ 2.4 |
| Power Consumption | < 1 W |
Process & Environment
| Process Temperature | −45 to +350 °C (T2 standard) · up to +500 °C (T4 high-temp) |
| Pressure Class | 1.6 / 2.5 / 4.0 / 10 MPa |
| Vibration Tolerance | 0.5 – 1.0 g standard (anti-seismic VRd higher) |
| Ambient Temperature / Humidity | −35 to +65 °C · 5 – 90 % RH non-condensing |
| Ingress Protection | IP65 / IP66 / IP67 |
| Hazardous Area | CNEX Ex d IIC T6 Gb; T-class confirmed at quotation |
Electrical & Output
| Power Supply | 24 VDC / 220 VAC / 3.6 V Li |
| Outputs | 4-20 mA (≤ 500 Ω; ≤ 300 Ω Ex) · Pulse 2 – 3000 Hz · HART · RS485 Modbus-RTU · 4G GPRS |
| Display | T, P, instantaneous + totalized flow |
| Cable Entry | M20×1.5 or 1/2 NPT |
Materials & Construction
| Body material | 304 standard · 316L / Titanium / Hastelloy C optional |
| Sensor material | 316L standard · Hastelloy C optional |
| Transmitter Housing | Cast aluminum, polyester coated |
| Connection Options | Flanged, wafer, sanitary, threaded, insertion |
| Transmitter Style | Integral or remote (separated) |
Flow range by pipe size.
Mass flow values for saturated steam at 165 °C, 0.5 MPa, density 3.26 kg/m³. For other conditions, contact engineering for verified sizing.
| DN | Inches | Velocity (m/s) | Volumetric Flow (m³/h) | Mass Flow (kg/h) |
|---|---|---|---|---|
| DN15 | ½″ | 5 – 50 | 3 – 30 | 10 – 100 |
| DN25 | 1″ | 4 – 60 | 6 – 100 | 20 – 326 |
| DN50 | 2″ | 3 – 70 | 20 – 400 | 65 – 1,304 |
| DN80 | 3″ | 3 – 70 | 60 – 1,200 | 180 – 3,912 |
| DN100 | 4″ | 3 – 70 | 90 – 2,000 | 294 – 6,520 |
| DN150 | 6″ | 3 – 70 | 200 – 5,000 | 652 – 16,300 |
| DN200 | 8″ | 3 – 70 | 350 – 8,000 | 1,141 – 26,080 |
| DN300 | 12″ | 3 – 70 | 800 – 18,000 | 2,608 – 58,680 |
| DN400 | 16″ | 3 – 70 | 1,400 – 31,000 | 4,564 – 101,060 |
| DN600 | 24″ | 3 – 70 | 3,400 – 70,000 | 11,084 – 228,200 |
Installation
Five rules to hold rated accuracy.
- Install indoors when possible. Outdoor needs a cover; cable U-shape from below to prevent ingress.
- Avoid magnetic / electrical interference. No shared supply with VFDs/welders.
- Avoid heavily vibrating pipes. Pipe clamps within 2D up/down + anti-vibration pads.
- Working clearance. Space for cable, display, maintenance.
- Honor straight-pipe-run. See table; disturbance drives upstream length.
Required Straight Pipe Run
| Upstream Disturbance | Upstream | Downstream |
|---|---|---|
| Standard pipe (no disturbance) | 10D | 5D |
| 90° elbow | 25D | 5D |
| Concentric reducer / fully open valve | 15D | 5D |
| Concentric expander | 30D | 5D |
| Two 90° elbows (same plane) | 25D | 5D |
| Two 90° elbows (different planes) | 40D | 5D |
| Fully open valve | 20D | 5D |
| Half-open valve | 50D | 5D |
Frequently asked questions
Need help sizing the steam build?
Send DN, steam pressure, dryness, flow range. Spec sheet, model code, drawing in 4 hours.