Meter for measuring heavily fluctuating flow rates.


  • Calibratable and exchangeable measuring insert in one unit, suitable for calibration comprising: measuring insert as main meter, switch-over valve, measuring capsule as bypass meter
  • Ideal design of housing and housing cover prevents sedimentation, stagnant water and air pockets
  • Bypass line integrated in housing cover. No risk of sedimentation or corrosion.
  • No measuring errors in the switch-over range
  • Measuring capsule as bypass meter and non-return valve easily replaced on site
  • Encapsulated counter of glass/copper IP 68
  • Good long-term measuring accuracy
  • Complete head unit with counter and sensors can be rotated by 350° for easier reading
  • System compatibility, WESAN WPV G can be extended with IZAR RADIO (clip on radio module) or IZAR PULSE (clip on pulse module)
  • In order to secure a safe switch-over the WESAN WPV G needs a minimum ingoing pressure of 0.6 bar
  • General
    Medium temperature range°C1 ... 30
    Temperature safety°C1 ... 50
    Ambient operating temperature°C1 ... 55
    Ambient storage temperature°C1 ... 55
    Nominal pressurePNbar161
    Display range0.5 l ... 999,999 m³
    Protection classIP 68
    Available bypass metersALTAIR MCI
    1 versions with different nominal pressure on request (see also special versions)
  • Technical data
    Nominal diameterDNmm5080100
    Permanent flow rateQ3m³/h2563100
    Minimum flow rateQ1l/h252252252
    Transitional flow rateQ2l/h402402402
    Overload flow rateQ4m³/h31.2578.75125
    Starting flow ratel/h222222
    Permanent flow rate bypass meterQ3m³/h444
    Switch-over flow rate risingm³/h2.22.72.4
    Switch-over flow rate fallingm³/h0.91.11.2
    2 with bypass meter ALTAIR MCI
  • Approval
    Nominal diameterDNmm5080100
    MID (DE-16-MI001-PTB002)
    Dynamic range bypass meter ALTAIR MCI (Q3/Q1)R100025004000
    Potable waterKTW / W270KTW / W270KTW / W270

    Information pursuant to Article 33 (1) of Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006:
    This product series contains components with the following substances in a concentration of more than 0.1% weight by weight (w/w):
    - Lead (CAS no.: 7439-92-1)

  • Special versions

    - Versions with different nominal pressure on request
    - Special flange holes on request

  • Dimensions
    Nominal diameterDNmm5080100
    Overall length (DIN 19625)Lmm270300360
    Overall length (DIN ISO 4064)Lmm-300350
    Flange diameterDmm165200220
    Hole circle diameterKmm125160180
    Number of screwholespcs48 / 48
    Screwhole diameterD1mm181818
    Height to remove measuring insertmm250228022802
    DiameterØ Bmm110110110
    Weight of complete meterkg17.425.529
    Weight of measuring insertkg6.39.39.3
    2 with bypass meter ALTAIR MCI
  • Pressure loss graph / Typical error graph