Heat/hot water meter, screw-type, model MWN-130 NUBIS IP65, DN250 (10"), Q3=1000.0 m3/h, R25, Tmax: 130°C, L=450mm, flange connection, dry-run type 60-7727201-000

Solution for measuring large flows in hot water installations

A device with a nominal diameter DN 250 and a mounting length of 450 mm has been designed for precise measurement of hot water consumption in high-flow systems. Thanks to the use of the turbine (propeller) measurement method, the water meter effectively handles flows up to 1000 m³/h, making it a key component in transmission networks, large industrial facilities, and public utility buildings. The housing, made of cast iron and coated with a specialized paint layer, ensures resistance to corrosion and mechanical damage, which is essential for operation in harsh environmental conditions.

Application and operating conditions

MWN NUBIS water meters are dedicated to installations where the medium temperature can reach up to 130°C. The device operates stably at a maximum working pressure of up to 16 bar (PN16). The rangeability coefficient R25 (Q3/Q1) enables accurate measurement at both high and relatively low flows, which is crucial for billing in district heating systems.

The possibility of installation in various configurations increases installation flexibility:

• Horizontal installation: permitted with the register facing upward or to the side.
• Vertical installation: permitted with the register facing to the side.

The flanged connection facilitates integration with existing pipelines of 10 inches (DN 250). The IP65 protection class protects the counting mechanism against dust and water jets, allowing safe operation in locations exposed to moisture or direct exposure to external factors.

Functionality and integration with remote reading systems

The modern design of this model enables easy expansion with communication modules. As standard, the device is equipped with a six-drum register prepared for the installation of communication overlays or transmitters. This allows for remote data reading without the need for physical access to the meter.

Systems supported by this model include:

• Reed switch and optoelectronic transmitters.
• Radio overlays (Wireless M-Bus).
• M-Bus and pulse systems.
• GSM modules for long-distance data transmission.

An important design aspect is resistance to external magnetic fields, confirmed by compliance with standards EN 14154-3 and EN-ISO 4064-2. This protects measurements from manipulation and ensures billing reliability even in industrial environments with numerous electrical devices generating magnetic fields.

Thanks to its universal design and high mechanical strength, this model provides a durable solution for installations requiring continuous monitoring of hot water or high-temperature technological water consumption. Preparation for AMR systems makes the device ready for operation in modern smart water resource management networks. It is worth noting that this device handles continuous flows (Q3) of 1000 m³/h at a maximum medium temperature of 130°C, defining its primary application range in large industrial and municipal installations.