Mechanical Water
Flow Meters
Overview
Mechanical Water Flow Meters (Horizontal Woltmann type) measure the volumetric flow rate of cold water in pipelines. Featuring a removable metering insert and a sealed counter mechanism, these meters provide robust performance and accurate readings in commercial, industrial, and municipal water supply networks. The integrated magnetic transmission ensures reliable data transfer between the rotating turbine and the protected dial.
Typical Use Case: Water distribution systems (municipal or commercial) where meter durability, easy maintenance, and direct readout are essential.
Key Features
- Cold Water Application: Operating temperature range of 0.1°C to 50°C, optimized for drinking water or general-use cold water lines
- Magnetic Transmission: Inductive coupling from turbine to register ensures the counter mechanism is fully sealed, preventing water ingress
- Direct Reading: 6 numeric rolls on the dial for straightforward flow and volume indication, with Dry Dial design enhancing legibility
- REED Pulse Emitter: Factory-equipped Reed switch for remote flow data logging and BMS integration, enabling real-time monitoring
- Removable Insert: Complete metering mechanism can be removed without disturbing the pipeline, simplifying maintenance and calibration
- Protective Lid: Shields the display from dust, debris, and mechanical damage in demanding environments
Advantages & Benefits
- Robust Performance: Woltmann design ensures consistent accuracy over a wide flow range with minimal pressure drop
- User-Friendly Readout: 6-digit counter gives immediate flow volume data at a glance
- Extended Service Life: Dry dial design and sealed mechanics protect internal components from sediment or corrosion
- Low Maintenance: Easy access via removable metering insert; standard pulse output simplifies remote monitoring tasks
- Flexible Integration: Reed switch emitter suits building management systems or remote water consumption billing
Technical Specifications
| Parameter | Details |
|---|---|
| Meter Type | Horizontal Woltmann (B-Meter) |
| Flow Measurement Range | Varies by nominal diameter (DN50–DN300) |
| Temperature Range | Cold water applications: 0.1°C to 50°C |
| Pressure Rating | PN16 (typical) or per model configuration |
| Measurement Mechanism | Turbine-based, with removable internal insert |
| Transmission | Magnetic coupling from turbine to register |
| Display | Dry Dial with 6 numeric rolls |
| Pulse Emitter | Reed Switch output for remote monitoring |
| Accuracy Class | Typically meets ISO 4064 or MID (Metering Directive) standards |
| Materials | Body: Cast iron / Ductile iron Impeller & Insert: Corrosion-resistant polymer or metal alloys |
| Connection | Flanged or threaded ends (varies by size & region) |
| Protection | Protective Lid over dial |
| Size (in/mm) | Flow Rate | Permanent Flow Rate (m³/h) | R-100 H Trans. Flow Rate | R-100 H Min. Flow Rate | R-160 H Trans. Flow Rate | R-160 H Min. Flow Rate | Min. Reading (m³) | Max Reading (m³) | Max. Pressure Loss | Max. Pressure |
|---|---|---|---|---|---|---|---|---|---|---|
| 50 (2) | 50 | 40 | 0.64 | 0.4 | 0.256 | 0.16 | 0.5 | 9,999,999 | 0.25 | 16 |
| 65 (2 1/2) | 78.75 | 63 | 1.008 | 0.63 | 0.403 | 0.252 | 0.5 | 9,999,999 | 0.4 | 16 |
| 80 (3) | 125 | 100 | 1.6 | 1 | 0.64 | 0.4 | 0.5 | 9,999,999 | 0.25 | 16 |
| 100 (4) | 200 | 160 | 2.56 | 1.6 | 1.024 | 0.64 | 0.5 | 9,999,999 | 0.4 | 16 |
| 125 (5) | 200 | 160 | 2.56 | 1.6 | 1.024 | 0.64 | 0.5 | 9,999,999 | 0.4 | 16 |
| 150 (6) | 312.5 | 250 | 4 | 2.5 | 1.6 | 1 | 5 | 9,999,999 | 0.16 | 16 |
| 200 (8) | 500 | 400 | 6.4 | 4 | 2.56 | 1.6 | 5 | 9,999,999 | 0.4 | 16 |