Requirements for straight pipe section:
Upstream: ≥ 15D (ideal), at least ≥ 10D
Downstream: ≥ 5D
(D=Inner diameter of pipeline)
If there are flow deflectors such as elbows, valves, and reducers, the straight pipe section should be appropriately extended.
Installation direction:
Liquid: It is recommended to install horizontally or vertically (with an upward flow direction).
Gas/Steam: It is recommended to install horizontally, with the sensor located at the top of the pipeline to prevent condensation from entering the sensor chamber.
Avoid installing vertically downwards to prevent the accumulation of bubbles or impurities.
Pipeline support:
There should be sturdy supports near the flowmeter to prevent vibration from being transmitted to the instrument.
Front and rear valves:
Set up a shut-off valve upstream and a flow control valve downstream to avoid direct throttling affecting vortex stability.
Grounding:
Sensors must be well grounded, especially when used in media with poor conductivity such as steam and gas, to prevent electrostatic interference.
3. Wiring and power supply
Connect the power supply (usually 24V DC or 220V AC) and output signal line correctly according to the wiring diagram.
Cables should use shielded wires and be kept away from strong electrical lines to prevent electromagnetic interference.
Explosion proof instruments must comply with explosion-proof wiring specifications.
4. Parameter settings (intelligent type)
Modern vortex flow meters are mostly intelligent and can be set through panels, HART controllers, or communication software
Medium type (liquid/gas/vapor)
Density, temperature, pressure (for gas/steam compensation)
Output range (e.g. 4-20mA corresponds to 0~1000 m ³/h)
Damping time (used to stabilize fluctuating signals)
Small signal cutoff (to prevent noise interference at low flow rates)
🔧 Gas/steam application: Temperature and pressure compensation function must be enabled to convert the operating flow rate into standard volume or mass flow rate.
5. Operation and commissioning
Slowly open the upstream valve to gradually increase the pressure of the pipeline, avoiding water hammer or air hammer.
Check for leaks.
Observe whether the output signal is stable and compare it with other instruments on site, such as pressure gauges and thermometers.
Conduct preliminary verification under stable operating conditions.