riza
riza is a single-jet vane-wheel dry-dial water meter for cold and hot water up to 90 °C, DN 15 and DN 20. The register sits in a chamber isolated from the water; accuracy class 2, dynamic range R160 or R100. It is used in apartments, private houses, commercial and office buildings; with the ORN-TWM-LW868 radio modem it reports readings over LoRaWAN®.
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Features
- Dry dial: register in a chamber isolated from the water;
- Accuracy class 2, R160 or R100 dynamic range;
- Cold and hot water up to 90 °C: temperature class T90;
- Maximum admissible pressure 16 bar, pressure-loss class Δp63;
- Compatible with the ORN-TWM-LW868 radio modem: readings over LoRaWAN®;
- Applications: apartments and private houses, water utilities and housing management companies, commercial and office buildings.
Specifications
Metrological data
| Nominal diameter (DN), mm | 15 · 20 |
|---|---|
| Permanent flow rate Q3, m³/h | 2.5 (DN 15) · 4.0 (DN 20) |
| Overload flow rate Q4, m³/h | 3.125 (DN 15) · 5.0 (DN 20) |
| Transitional flow rate Q2, m³/h, R160 / R100 | 0.025 / 0.040 (DN 15) · 0.040 / 0.064 (DN 20) |
| Minimum flow rate Q1, m³/h, R160 / R100 | 0.016 / 0.025 (DN 15) · 0.025 / 0.040 (DN 20) |
| Starting flow rate R100, m³/h, max. | 0.0125 (DN 15) · 0.02 (DN 20) |
| Dynamic range | R160 or R100 |
| Accuracy class | 2 |
| Max. permissible error: Q1…Q2 · Q2…Q4 | ±5 % · ±2 % |
Operating conditions
| Maximum admissible pressure (MAP) | 1.6 MPa (16 bar) |
|---|---|
| Pressure loss at Q4, max. | 0.063 MPa (Δp63) |
| Water temperature: cold · hot | 0 to +30 °C · up to +90 °C (T90) |
| Ambient temperature · humidity | +5 to +50 °C · 5 to 98 % non-condensing |
| Ingress protection | IP44 (install in rooms not subject to flooding) |
Construction
| Type | single-jet vane-wheel, dry dial |
|---|---|
| Register | roller or roller-and-pointer |
| Connection: body thread · tail-piece thread | G3/4B · R1/2 (DN 15), G1B · R3/4 (DN 20) |
| Body length L, mm | 80 / 110 (DN 15), 130 (DN 20) |
| Overall length L1, mm | 140 / 170 (DN 15), 230 (DN 20) |
| Width × height, mm | 78 × 69 (DN 15), 78 × 70 (DN 20) |
| Weight, kg, max. | 0.5 (DN 15) · 0.6 (DN 20) |
| Warranty | 18 months from the date of sale |
| Manufacturer | Ningbo Xingyuan Meter Technology Co., Ltd, China |
Documentation
Datasheets
Versions
| Part number | Version |
|---|---|
| riza DN 15 | DN 15, Q3 2.5 m³/h, G3/4B, L 80 or 110 mm, R160 or R100 (DN 15 R160 — RW 15-2.5-R160) |
| riza DN 20 | DN 20, Q3 4.0 m³/h, G1B, L 130 mm, R160 or R100 |
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