Ultrasonic steam flow measurement
Fields of application
Renewable energy: district heating, metal, paper and cardboard, food and pharmaceuticals (in-line sterilization and cleaning processes), thermal energy: boiler auxiliaries (combustion air preheaters, heat exchangers).
Benefits
This fixed-mount (non-intrusive) ultrasonic flowmeter enables steam flow to be measured without having to cut the piping. It used to be difficult to measure the steam flow used in plants in various industrial sectors, but this flowmeter can now be installed even when the equipment is running. We have developed an ultrasonic sensor capable of measuring steam with high sensitivity, as well as a new method of noise reduction, both of which we have integrated into this ultrasonic flowmeter to measure steam flow with great accuracy, even at very low pressure (from 0.1 MPa (G))*.
Note 1) or at very high temperatures (up to 180°C).
Note 1) The (G) in the unit MPa (G) indicates gauge pressure (relative to an atmospheric pressure of 0).
| Mounting method | Non-intrusive type |
| Measuring fluid | Saturated steam |
| Measurement method | Transit time difference |
| Flow speed | 0 to ±50 m/s |
| Accuracy | Flow velocity 10 m/s or less: ±0.3 m/s Flow velocity from 10 to 30 m/s: ±3% of velocity. Flow velocity greater than 30 to 50 m/s: ±5% of velocity. |
| Straight pipe length required | Upstream: 20 D or more; downstream: 10 D or more |
| Pipe material | Carbon steel, stainless steel |
| Pipe diameter | DN: 50, 65, 80, 100 |
| Pipe thickness | 2.8 to 3.9 mm |
| Fluid temperature | 120 to 180°C |
| Fluid pressure | 1bar to 9 bar |
| Moisture and splashes | Humidity: 0%, no splashing |
| Input (for mass flow conversion) | Current input (4 to 20 mA DC) ×1 Temperature input (pt100) ×1 (optional) |
| Output | Current output (4 to 20 mA DC) ×1 Total pulse output ×1 Contact output ×1 |
| Mass flow conversion | Fixed value input (density) - temperature input - pressure input |
| Communication | RS-485 (optional) |
| Food/consumption | 100 to 240 V AC, 20 VA |
| Degree of protection | IP67 (with connectors connected) |
| Ambient temperature | -20 to +60°C |
| Ambient humidity | 95% HR or less |
| Insulation | Class D grounding with an earth resistance of 100Ω or less |
Technologies
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Clamp-on ultrasonic flow meter for steam - Converter - FSJ
Reference : FSJ
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