Wolman Water Meter With Parallel Turbine Shaf
Wolman paralelel type meters are always used when high flow rates with a relative constant flow rate profile are to be measured. Trough its robust construction they not only are capable of covering a large measuring range, but the measuring accuracy is also long-term stable.
They hidrodynamic optimize turbine is reliabli operated already at small flow rates and “upwards” is has enough power reserve to reliably measure flow rate peaks. Especially strong bearings with low friction guarantee a long life of the meter.
Read sensors, optical and indctive- NAMUR sensors can always be retrofitted without the damaging calibration eal. Then meter can be integrated with data communication or automation or automatiin and control system in a simple and flexible way.
Performance Characteristic in Overview :
- Low starting flow, high overload security
- Wide measuring range
- Removable measuring insert
- Low head loss
- Hdraulic bearing relieve for long-term measuring stability
- Retrofittable with active and passive pulsers
- Metal Protective cover serially, plastics optional
- Eacuated conter protected from condensation
- Dry dial counter with large number rollers simplities the readability
- For cold water up to 30°C, with security up to 50°C
- For horizontal, vertical installation positions
- High Pressure
Technical Data :
| Nominal Diameter | DN 250 |
| Nominal Flow (Qn) | 400 m3/hour |
| Overal Length (L) | 450mm |
| Metrological class | B |
| Maximum Flow (short-term) Qmax | 1200m3/hour |
| Maximum Flow (constant) | 600 m3/hour |
| Transitional | 32 m3/hour |
| Minimum Flow (Qmin) | 12 m3/hour |
| Flow Rate with 0.1 bar head lose | 1000 m3/hour |
| Head lost at qmax | 0.05 bar |
| Display range | Min 20 l/Max 9.999.999 m3 |
| Maximum temperature, max | 16 bar |
| Height (H) | 470 mm |