2025-08-29
Water management is an essential part of modern infrastructure, whether in municipal networks, industrial plants, or agricultural systems. Accurate flow measurement not only ensures efficiency but also supports billing accuracy, resource planning, and long-term cost savings. Among different flow meters available today, the Woltmann Water Meter stands out as one of the most reliable solutions for measuring large volumes of water.
In this article, we will explore what makes the Woltmann Water Meter an industry standard, its technical specifications, how it works, and why it is widely used across various sectors.
A Woltmann Water Meter is a type of mechanical flow meter designed specifically for measuring medium to high flow rates of cold potable water or clean industrial water. It is characterized by its horizontal-axis turbine design, where water flow drives the impeller, and the rotation is transferred through gears to register the volume consumed.
This design allows the Woltmann meter to handle large water capacities with minimal pressure loss, making it a preferred option in:
Municipal water supply systems
Irrigation networks
Industrial water distribution
Commercial complexes
High Accuracy – Complies with ISO 4064 and MID standards.
Durability – Heavy-duty cast iron or ductile iron body ensures long service life.
Low Pressure Loss – Designed to reduce flow resistance and energy consumption.
Wide Range – Available in sizes from DN50 to DN300 (and beyond on request).
Modular Register – Dry dial or wet dial registers, often rotatable for easy reading.
Optional Pulse Output – For remote monitoring and data logging.
Corrosion Resistance – Internals treated to resist scale and wear.
Replaceable Measuring Element – Simplifies maintenance without removing the body.
The following table provides a clear overview of typical specifications for a standard Woltmann Water Meter manufactured by NINGBO HAISHU YONGZHOU METERS CO., LTD.
Parameter | Specification |
---|---|
Nominal Diameter (DN) | DN50 – DN300 |
Nominal Pressure | PN10/PN16/PN25 |
Temperature Range | 0.1°C – 50°C (cold water) |
Maximum Flow Rate (Q4) | 31.25 m³/h – 1250 m³/h (depending on DN size) |
Permanent Flow Rate (Q3) | 25 m³/h – 1000 m³/h |
Transitional Flow Rate (Q2) | 0.4 m³/h – 16 m³/h |
Minimum Flow Rate (Q1) | 0.25 m³/h – 10 m³/h |
Pressure Loss | ≤ 0.025 MPa |
Accuracy Class | Class B or Class C |
Register Type | Dry dial / Wet dial / Vacuum-sealed |
Communication Options | Pulse output (reed switch), AMR/AMI compatible |
Installation Position | Horizontal |
The versatility of Woltmann Water Meters makes them suitable for many fields:
Municipal Supply Networks – To measure bulk water supply between districts.
Industrial Use – For process water management in factories.
Agricultural Irrigation – Ensures precise water allocation in large farms.
Commercial Complexes – Shopping centers, hotels, and hospitals requiring accurate billing.
Utility Companies – Integration with smart systems for real-time monitoring.
The principle of operation is simple yet highly effective:
Water enters the body of the meter.
Flow energy drives the turbine (impeller) located in the axis of the pipe.
The rotation of the turbine is mechanically transferred to a register through gears.
The register counts and displays the volume of water that has passed.
This mechanical design ensures consistent readings even under high flow conditions.
Q1: What is the measuring range of a Woltmann Water Meter?
A: The measuring range depends on the nominal diameter. For example, a DN100 Woltmann Water Meter typically measures from 0.4 m³/h at minimum flow to 250 m³/h at maximum flow. Larger diameters such as DN300 can measure up to 1250 m³/h. This wide range makes it suitable for bulk water measurement.
Q2: Can Woltmann Water Meters be used for hot water?
A: Standard models are designed for cold water up to 50°C. However, manufacturers like NINGBO HAISHU YONGZHOU METERS CO., LTD also provide customized hot water Woltmann meters that can operate up to 90°C or even 130°C, depending on the application. Always check the product label before installation.
Q3: How accurate is a Woltmann Water Meter?
A: Woltmann Water Meters typically comply with ISO 4064 standards, with Class B or Class C accuracy. This ensures measurement errors remain within ±2% at normal flow rates and ±5% at transitional flow rates. Such accuracy is sufficient for billing and industrial process control.
Q4: Can the meter connect to remote monitoring systems?
A: Yes, most modern Woltmann Water Meters are equipped with pulse output or can be upgraded with communication modules compatible with AMR (Automatic Meter Reading) or AMI (Advanced Metering Infrastructure). This allows utilities and industries to integrate them into smart water networks.
With decades of experience in precision water metering, NINGBO HAISHU YONGZHOU METERS CO., LTD has established itself as a trusted manufacturer of high-quality Woltmann Water Meters. Our products are widely used in municipal supply, agriculture, and industrial applications worldwide. We focus on:
Strict Quality Control – Compliance with ISO and MID standards.
Wide Product Range – Covering different diameters, flow rates, and applications.
Customization Options – Hot water versions, AMR/AMI solutions, and tailor-made requests.
Global Distribution – Serving clients across multiple continents.
The Woltmann Water Meter remains a proven and dependable solution for accurate bulk water measurement. Its combination of high flow capacity, durability, and compatibility with modern smart monitoring systems makes it indispensable in today's water management industry.
If you are looking for a reliable partner in water metering solutions, please contact: NINGBO HAISHU YONGZHOU METERS CO., LTD. .