Type Woltman parallel: WPD (DN 50 – 150), WPHD (DN 200 – 300)

WPD / WPHD is a woltman bulk water meter with parallel turbine shaft.

The ZENNER Bulk water meter WPD / WPHD is specially constructed for the measuring of high flow rates with a mainly constant flow rate profile. Due to the  robust design, WPD / WPHD can cover a wide measuring range and provide accurate measuring results over a long period. So it covers almost all measuring tasks in the drinking water supply and distribution.

The housing of the WPD / WPHD was flow-optimized. The mesuring insert was newly constructed as a replacable metrological unit according to european MID. In combination with an up-to-date bearing of the impeller a good linearity and long-term stability of the error curve can be achieved. The robust copper-glass-register is non-diffusive and protected against condensation. It also works reliably under the hardest conditions (e.g. in flooded pits or shafts).

The  WPD / WPHD is optimally prepared for remote reading. Retrofitting of electronic communication modules (EDC radio, EDC M-Bus, EDC pulse) and conventional Reed sensors is possible at any time and without  violating the calibration seal.

Application area

  • For the measuring of high flow rates
  • For horizontal or vertical installation
  • For cold water up to 50° C

AMR options

  • Retrofittable with up to two reed-sensors
  • Stationary GSM system

Serially equipped with communication interface for:

  • Electronic pulser
  • Wired M-bus
  • Radio via wireless M-bus according to OMS (Open Metering System)
  • Radio via LPWAN (LoRaWAN™, SIGFOX)

Performance Characteristics

  • Replacable metrological unit (according to european MID)
  • Available with long-term flood-proof (IP68) hermetically sealed glass/copper register, third-party IP68 tested
  • Low starting flow, high overload security
  • Wide measuring range, small pressure loss
  • Hydraulic bearing relieve
  • Long-term measuring stability
  • Swirl-reducing inlet
  • No straight inlet or outlet needed (U0/D0 according to OIML R49 and DIN EN ISO 4064)
  • Materials and coating approved in accordance with KTW / W 270
  • Optional WS overall length for DN 50, DN 65, DN 80 and DN 100 available
  • Optional ISO length for DN 50, DN 80 and DN 100 available
  • WPD / WPHD DN 50 – DN 300 approved in accordance with MID and OIML
  • WPHD DN 400 and DN 500 factory tested

Product Features

Measuring Principle Woltman parallel
Length without connectors 200 mm
225 mm
250 mm
300 mm
350 mm
450 mm
500 mm
600 mm
800 mm
Housing Material Cast Iron
Register Dry Dial protection class IP 68 (“Copper Can”)
Nominal Flow Q3 (≈ Qn) Q3=25 (≈ Qn 15)
Q3=40 (≈ Qn 25)
Q3=63 (≈ Qn 40)
Q3=100 (≈ Qn 60)
Q3=250 (≈ Qn 150)
Q3=400 (≈ Qn 250)
Q3=630 (≈ Qn 400)
Q3=1000 (≈ Qn 600)
Q3=1600 (≈ Qn 1000)
Q3=2500 (≈ Qn 1500)
Nominal Diameter DN (mm) DN 50
DN 65
DN 80
DN 100
DN 125
DN 150
DN 200
DN 250
DN 300
DN 400
DN 500
Temperature Cold water up to 50° C
Specified Units on Display Cubik Meters (m³)
Metrological Class horizontal (max.) R 200
AMR Technologies Reed Pulser
Electronic Pulser
Radio via wireless M-Bus
Radio Special System (GSM)
Funk via LPWAN (LoRaWAN™, SIGFOX™)
Operating pressure (max.) MAP 10
MAP 16


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