Vortex flowmeters consist of a pipe wiht a solid "shedder" bar which is mounted across the diameter of the pipe perpendicular to the flow. As flow passes the shredder bar vortices (swirls) are formed alternately on each side of the bar. The higher the flowrate the higher the frequency of the vortices. Dual piezoelectric crystals measure this frequency and output the volumetric flowrate. There are no moving parts to this rugged and reliable flowmeter which is suitable for liquids, gases, and steam.
| Manufacturer | Rosemount, Emerson Process Management |
| Fluids | Gases, liquids, biphasic |
| Sizes | 1/2" to 12" |
| Max pressure & temperature | 150 Bar & 427°C |
| Flow ranges |
24 kg/h to 104 t/h en vapeur
1.4 Nm3/h to 13 000 Nm3/h en Air |
| Accuracy | 0,1% of full scale |
| Rangeability | 30:1 |
| Straight run pipes | 110 diameters upstream, 5 diameters downstream |
| Options | Integral transmitters, remote transmitter, local display |
| Advantages | No moving parts, rugged, flexible |
| Limitations | Higher viscosity reduces rangeability for liquids, low velocities not measurable |
Serv'Instrumentation
ZI Broteau Nord
Impasse Louis VERD
69540 IRIGNY
FRANCE
Phone : +33 (0)4 78 51 47 50
Fax : +33 (0)4 78 51 59 96