| Nominal diameter | DN15 ~ DN200 |
| Measurement accuracy | 1.0%, 1.5% |
| Working pressure | Standard 1.6MPa; high pressure can be specially customized |
| Housing material | Cast aluminum alloy housing, 304 stainless steel housing |
| Explosion-proof rating | Exd IIIC T6 |
| Protection rating | IP65 |
| Output signals | 4~20mA, pulse, RS485, etc. |
Vortex Flow Meter
Vortex Precession Flowmeter
Detailed Description
Working principle
A set of spiral flow guide vanes is installed at the inlet side. When the fluid enters the flow sensor, the guide vanes force the fluid to generate a strong swirling flow. When the fluid enters the diffuser section, the swirling flow is affected by backflow and begins to rotate a second time, forming a gyroscopic vortex precession phenomenon. This precession frequency is proportional to the flow rate and is not affected by the physical properties or density of the fluid. The sensing element detects the frequency of the fluid’s secondary rotational precession, enabling good linearity over a wide flow range. The signal is amplified, filtered, and shaped by a preamplifier into a pulse signal proportional to the flow velocity. It is then sent together with other detection signals such as temperature and pressure to a microprocessor for totalization processing. Finally, the measurement results are displayed on an LCD screen.
Flow Range
| Nominal Diameter DN (mm) | Type* | Flow Range (m3/h) | Working Pressure (MPa) | Accuracy Class |
|---|---|---|---|---|
| 15 | Type A | 1.0~10 | 1.6 | 1.0 |
| 20 | Type A | 1.5~15 | 1.6 | 1.0 |
| 25 | Type A | 3.0~30 | 1.6 | 1.0 |
| 32 | Type A | 6.0~60 | 1.6 | 1.0 |
| 40 | Type A | 7.0~70 | 1.6 | 1.0 |
| 50 | Type B | 12~150 | 1.6 | 1.0 |
| Type B | 2.5~75 | 1.6 | 1.0 | |
| 80 | Type A | 40~400 | 1.6 | 1.0 |
| Type B | 10~200 | 1.6 | 1.0 | |
| 100 | Type A | 80~900 | 1.6 | 1.0 |
| Type B | 30~600 | 1.6 | 1.0 | |
| 150 | Type A | 15~1500 | 1.6 | 1.0 |
| Type B | 40~900 | 1.6 | 1.0 | |
| 200 | 24~3600 | 1.6 | 1.0 |
application case
