A Woltman water meter, also known as a helical vane water meter, is mainly designed for measuring medium and large water flow. It is widely used in urban water supply networks, industrial and commercial water metering, and irrigation scenarios. Its core features cover aspects like measurement performance, structural design, intelligence, and adaptability, which are specifically detailed as follows:
- Outstanding measurement performance
- Wide measurement range and high accuracy: It has an excellent range ratio (some models can reach R200), which allows it to not only accurately measure large water flows but also maintain good measurement accuracy at low flow rates. Typically, the error is only ±5% in the low-flow range (between Q1 and Q2) and ±2% in the normal to high-flow range (between Q2 and Q4), meeting the requirements of trade settlement and water consumption monitoring. It complies with international standards such as ISO 4064 and OIML R49.
- Low pressure loss: Its internal flow channel is designed to be smooth and straight, and the impeller is lightweight. This minimizes the obstruction to water flow during operation, resulting in much lower pressure loss than that of many traditional mechanical water meters. It helps maintain the pressure stability of the water supply pipe network and reduces the energy consumption of water pumps.
- Sturdy structure and long service life
- Robust material and structure: The meter body is usually made of cast iron or ductile iron with an internal and external epoxy powder coating, which has strong pressure resistance and corrosion resistance. The internal key components adopt steel pivots and synthetic sapphire bearings, and some use wear-resistant and anti-scaling plastic materials for the measuring mechanism, reducing mechanical wear. Some models have only the impeller as the moving part, further reducing the failure rate.
- Reliable connection and protection: Most models adopt flange connection, which can be firmly connected to large-diameter pipelines (DN50 to DN500 and above), ensuring good sealing performance and withstanding a maximum working pressure of up to 16 bar. The register is often installed in a dry compartment, and some have an IP68 hermetically sealed structure, avoiding water contact and ensuring clear and durable readability. The tempered mineral glass lens used for reading is scratch-resistant and not easy to turn opaque.
- Easy installation and maintenance
- Flexible installation: Most of them are of horizontal structure, and some vertical models can be installed at the connection of vertical and horizontal pipelines. Some models do not require additional straight pipes at the inlet and outlet, which greatly simplifies the installation process and saves installation space.
- Convenient maintenance: The measuring mechanism of many Woltman water meters can be disassembled independently. When inspection, repair, or replacement is needed, there is no need to remove the entire meter body from the pipeline, which effectively reduces maintenance time and costs. In addition, the register can rotate 355°, facilitating reading from different angles.
- Strong intelligent expansion capability
- Retrofit-friendly for remote reading: It can be retrofitted with electronic data capture modules, such as LoRaWAN and Wireless M-Bus radio modules, as well as combined M-Bus and pulse modules. The maximum transmission distance between the meter and the data collector can reach 150 meters, enabling centralized management of water consumption data.
- Diversified functional extensions: It can be equipped with reed switches, Hall elements, photoelectric sensors, etc., to realize pulse signal transmission. It can also be combined with GSM systems or prepaid control valves to achieve functions like remote monitoring, prepaid water supply, and remote control, adapting to the construction needs of smart water services.
- Good environmental adaptability
It is mainly suitable for measuring cold and clean drinking water or service water with a temperature not exceeding 50°C. The materials in contact with drinking water comply with relevant national standards and drinking water certification requirements. Moreover, some models adopt a non-magnetic design to avoid measurement errors caused by external magnetic field interference, ensuring stable operation in complex on-site environments.
Post time: Nov-23-2025