Woltman meter for hot water consumption measurement
The Apator Powogaz MWN130-40 measures hot water volume in distribution networks, apartment-building metering installations, industrial facilities and commercial premises. This Woltman meter has its turbine axis parallel to the pipeline. A magnetic coupling transfers rotation to the dry register, which displays accumulated volume in cubic metres.
Benefits for your metering system
- DN40 flow ratings. Permanent flow Q3 is 25 m³/h and overload flow Q4 is 31.25 m³/h.
- R40 measuring ratio. Minimum flow Q1 is 0.625 m³/h and transitional flow Q2 is 1 m³/h.
- Easy reading. The register can be rotated through up to 358° to make the dial accessible.
- Coated cast-iron body. A removable measuring insert supports servicing of the meter.
- Remote reading options. A T130-rated NK reed-switch transmitter is available for the appropriate -NKP version. Confirm communication-module compatibility with the register and temperature conditions.
Applications and version selection
MWN130-40 has a DN40 nominal diameter and a 200 mm installation length. Select the meter using minimum and operating flow rates at the metering point. This card covers T130, Q3 25 m³/h and R40. Confirm flange drilling and the reading method. Maximum admissible pressure is 16 bar; verify connection dimensions separately.
Remote meter reading
For pulse reading, select a prepared MWN130-40-NKP meter and a T130/IP65 NK transmitter. Confirm the transmitter and pulse value in the order. For an optical or induction module, verify the register design and permitted module operating conditions. Additional equipment determines the communication interface, stored data and events.
Frequently asked questions
Does the meter need a power supply? The mechanical MWN130 measures and displays water volume without an external power supply. The power requirements of an additional communication module depend on its model.
What is the NK pulse value? MWN130-40 supports 10 or 100 L/pulse, depending on the prepared register configuration. An -NKP register and a T130/IP65 NK transmitter are required. Confirm the pulse value from the marking and package documentation, then match it in the receiving device.
Which installation positions are supported? The manufacturer specifies H and V positions. Follow the flow-direction arrow, keep the meter fully filled with water and meet the installation requirements in the operating manual.
Technical specifications
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Parameter
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Value
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Model
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Apator Powogaz MWN130-40
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Design
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Woltman turbine meter with a dry register
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Medium
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Hot water
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Nominal diameter
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DN40 / 40 mm
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Permanent flow Q3
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25 m³/h
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Overload flow Q4
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31.25 m³/h
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Transitional flow Q2
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1 m³/h
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Minimum flow Q1
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0.625 m³/h
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Measuring ratio R
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R40
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Installation length L
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200 mm
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Temperature class
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T130: +0.1 to +130 °C
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Pressure
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MAP16 — 16 bar; operating range 0.3–16 bar
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Connections
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Flanged; standard PN16 drilling
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Body
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Coated cast iron
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Register protection
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IP65
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Installation orientation
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H and V as specified in the manufacturer instructions
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Register
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Dry register, rotates through up to 358°, indication in m³
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Power supply
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Not required for mechanical measurement
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Remote reading
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Optional T130-rated NK transmitter or compatible module
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Ordering and package contents
When ordering, specify MWN130-40, the temperature class, flange drilling and required output. Agree the transmitter, module and mounting parts in the package specification.
The meter is rated MAP16. Catalogue flange drilling is PN16 as standard. Match the connection dimensions to the pipeline flanges.
Order an MWN130-40 for your metering installation. Provide the operating flow rate, pipeline size, water temperature and required reading method to select the version.
