VN2000 Hot Tap Insertion
- Measure volumetric or mass flow rate of steam, gas or liquids
- DN50 – DN 1200 (2” – 48”)
- Machined safety stop provides constant seal, will not leak
General information
The VN2000 Hot Tap Insertion Vortex Flow Meter measures the volumetric flow, mass flow rate or BTU/energy of steam, gas or liquids over a large flow range. The meter is a heavy duty design engineered to stand up to the most abusive environments inside and outside the pipe.
Technical data
| Medium | Steam/gas |
| Connections | 1 1/2" NPT, ASME/ANSI 150, 300 flanged |
| Pipe sizes | DN50 - DN1200 (2" - 48") |
| Flow range* | Steam: 26 - 2282271 kg/m³ |
| Gas/air: 0,5 - 187593 kg/m³ | |
| Pressure range | Steam: 0,4 - 27 bar |
| Gas/air: 0 - 69 bar | |
| Accuracy | ± 1 % of reading |
| Repeatability | ± 0,25 % of reading |
| Output | 1 x 4-20 mA, 10-36 V max. load, 24 bit resolution |
| Adjustments of 4 mA and 20 mA signal from the keypad and reset of anomalies found between the meter and the monitoring device | |
| *Depending on pipe size and pressure/density |
Measuring principle
Vortex meters
Within the flow meter as flowing media moves across the strut or "bluff bar" vortices are also shed, but on a smaller scale. The meter transmits an ultrasonic beam through the vortex pattern downstream of the strut. As vortices are shed, the carrier wave of the ultrasonic signal modulates. The modulation of the carrier wave is measurable and proportional to the number of vortices shed. Digital processing enables the vortices to be counted, and this value is converted into a velocity.