Description: Fluid‑dynamic component named after physicist Giovanni Battista Venturi. Operates per Venturi effect (Bernoulli’s principle): As fluid flows through variable‑cross‑section piping, reduced‑cross‑section accelerates flow‑velocity and lowers static‑pressure forming negative‑pressure suction zone; downstream pipe‑section expands again, flow‑velocity decreases and static‑pressure partially recovers.
Three functional sections:
1. Converging section: Pipe cross‑section tapers down to accelerate fluid velocity.
2. Throat: Minimum‑diameter zone with maximum flow‑velocity and minimum static‑pressure for negative‑pressure suction generation.
3. Diverging section: Pipe‑diameter gradually expands; fluid decelerates with partial static‑pressure recovery
Fluid (gas / liquid) flows through converging section into throat. Sharp velocity‑rise generates local low‑pressure region which can entrain external liquid, gas or powder. Fluid then passes diverging‑section for deceleration and pressure recovery to realize mixing, atomization, dust‑removal or flow‑measurement functions.
Energy relationship: Static pressure + Dynamic pressure ≈ constant; higher flow‑velocity corresponds to lower static‑pressure.
‑ No moving components; simple, robust structure with low maintenance demand.
‑ Enables self‑priming, mixing, atomization and flow‑rate detection.
‑ Inherent pressure loss; throat section prone to wear; wear‑resistant material selection required for particle‑laden media.
1. Venturi flow‑meter: Measures gas / liquid flow‑rate via differential‑pressure readings across inlet‑outlet and throat.
2. Venturi scrubber (dust‑removal): Metallurgical‑chemical flue‑gas dust‑removal & desulfurization; water is injected at throat for high‑speed gas‑liquid mixing for particulate capture.
3. Ejector / jet pump: Uses negative‑pressure effect for material suction‑conveyance and vacuum generation.
4. Carburetors, spray nozzles, medical nebulizers: Negative‑pressure draws‑out and atomizes liquid media.
5. Dust‑collector accessory venturi tube: Matched for pulse‑jet cartridge dust‑collectors to guide blow‑off jet‑airflow for filter‑bag cleaning.
Contact Us