In scenarios where large flow rates of water need to be measured, such as in urban water supply networks, large factories, and the main inlet of buildings, extremely high requirements are placed on the range, accuracy, durability, and reliability of water meters. The Waltermann (Woltmann) type flange water meter, as a classic horizontal helical water meter, was specifically designed to address these challenges and has become an indispensable core instrument in the field of medium and large flow liquid measurement.
Ⅰ. Core Principle and Structural Characteristics: Designed for Large Flow Rates
The core working principle of Waltermann water meters lies in their helical rotor design. When water flows through the water meter, it will impact the spiral-shaped rotor at an angle to the flow direction, causing it to rotate. The rotational speed of the rotor is proportional to the flow rate passing through the water meter, and the rotation of the rotor is transmitted to the counter through magnetic coupling or gear transmission mechanisms, thereby accumulating and displaying the total flow.
Its typical structural characteristics include:
Flange Connection: The ends of the meter body adopt flange disk design, which can be firmly connected to pipes with nominal diameters (such as DN50, DN80, DN100, and even larger) to withstand high pipeline pressure, ensuring sealing performance, and facilitating installation and maintenance.
Horizontal structure: Usually installed horizontally, the water flow direction is parallel to the impeller axis, and the flow channel resistance is small, making it particularly suitable for large flow measurement.
Wide range ratio: The outstanding Walterman water meter has a wide range ratio (Q3/Q1), which means it can accurately measure high flow rates and also start and maintain a certain measurement accuracy at low flow rates.
II. Key Advantages: Precise, Durable, Low Power Consumption
High flow rate and low pressure loss: Due to its smooth straight-through flow channel design and lightweight impeller, the Walterman water meter causes minimal obstruction to the water flow and has a pressure loss much lower than that of some mechanical water meters. This is of great significance for maintaining pipe network pressure and saving pumping energy.
Wide measurement range and high accuracy: Suitable for a wide range of flow rates from medium to extremely high. It can maintain a high measurement accuracy within the specified flow range (usually up to level 2 or higher), ensuring the fairness of trade settlement.
Sturdy structure, long lifespan: The main shell is usually made of sturdy materials such as cast iron, ductile iron or stainless steel. The internal bearings and other key components have good wear resistance, enabling them to operate stably in water containing tiny particles for a long period of time, with a long service life.
Maintenance convenience: Many modern Walterman water meters adopt a modular design. Without removing the meter body, the movement can be replaced, significantly reducing the maintenance difficulty and cost.
III. Typical Application Scenarios
Walterman Flange Water Meters are widely used in scenarios where precise water measurement is required:
Municipal water supply: measurement and leakage control of regional water supply main pipes and water transmission trunk lines.
Large industrial plants: total water intake points of factories, circulating cooling water systems, and fire water monitoring.
Large commercial buildings and parks: total water pipes of shopping centers, hospitals, and university campuses.
Agricultural irrigation: water intake measurement of large and medium-sized irrigation channels. Summary
The Walterman Flan water meter has established its significant position in the field of large-scale water consumption measurement in industry and municipal sectors due to its mature technology, outstanding large-flow measurement capability, low operating pressure loss, and robust durability. It is a key equipment for water resource management, cost accounting, and pipeline efficiency optimization, providing reliable data support for water supply enterprises and large water-consuming units. It is a solid foundation for achieving efficient utilization and refined management of water resources.