Vortex Flowmeter

Vortex flowmeters operate according to the **von Kármán vortex shedding principle**.  As steam, gas or liquid flows around this obstruction at a sufficient velocity, the fluid separates alternately from both sides of the bluff body, creating a repeating pattern of vortices downstream known as a **Kármán vortex street**.

As these vortices are shed alternately from each side of the bluff body, they generate corresponding high- and low-pressure fluctuations in the flowing medium. A sensing element detects these periodic pressure or force variations and converts them into an electrical signal that can be processed by the transmitter.

For steam and gas applications, vortex flowmeters can also be combined with temperature and pressure measurement or compensation. With the corresponding density information, the system can calculate compensated or mass flow, depending on the meter configuration.

Install the vortex flowmeter where pipeline vibration and flow disturbance are minimized. Avoid locations close to strong vibration sources or high-power electrical equipment. If pipeline vibration cannot be avoided, provide adequate pipe supports and, where necessary, use vibration-damping measures to improve measurement stability.

Provide the upstream and downstream straight pipe lengths specified in the product manual, and keep valves, elbows, reducers and other flow disturbances away from the meter inlet. The flowmeter should be installed concentrically with the pipeline, without mechanical stress, and flange gaskets must not protrude into the flow path.

Ensure reliable grounding, leave sufficient space for wiring and maintenance, and open control valves gradually during startup to avoid sudden pressure or flow shocks.