ALTAIR V4 DN25/32/40



ALTAIR V4 represents the latest generation of volumetric meters developed within the framework of the MID and European standards to meet field requirements.
ALTAIR V4 is a particularly compact and robust meter, adapting to the most restrictive environments and compatible with varying water qualities.
Modular, ALTAIR V4 may be fitted at any time with an IZAR clip-on module converting it into a communicating meter, ready for mobile or fixed network (radio/wired) reading.


  • DN25/32/40
  • Q3=6.3 m3/h (DN25/32), Q3=10 m3/h (DN25/32) and Q3=16 m3/h (DN40)
  • MID approval up to R=800 (Q3=6.3 m3/h), R=500 (Q3=10 m3/h) and R=1,000 (Q3=16 m3/h)
  • Starting flow rate at 1 l/h (Q3=6.3 m3/h), 2.9 l/h (Q3=10 m3/h) and 4 l/h (Q3=16 m3/h)
  • Brass body
  • Glass-copper register
  • Compact
  • Installation in any position
  • Metrological data
    Nominal diameterDNmm2525323240
    Nominal flow rateQ3m³/h6.3106.31016
    R standard*Q3/Q1160160160160160
    Starting flow ratel/h12.912.94
    Minimum flow rate*Q1l/h39.37562.539.37562.5100
    Transition flow rate*Q2l/h6310063100160
    Maximum flow rateQ4m³/h7.87512.57.87512.520
    Head loss at Q3bar0.6160.4960.6110.4840.630
    Head loss at Q4bar0.9620.7760.9550.7850.984
    Kvs (deltaP=Q²/Kvs²)
    * Other values on request.
  • Approval
    MID approvalLNE-6250 | Type A2
    StandardsEN 14154 | ISO 4064 | OIML R49
    Sanitary conformityACS | Belgaqua | AoC DEU | WRAS | DM 174

    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)

  • Temperatures and pressure
    Water temperature°C0.1 ... +50
    Ambient operating temperature°C+1 ... +55
    Storage temperature°C-10 ... +55
    Nominal pressurePNbar16
  • Dimensions
    Nominal diameterDNmm2525323240
    Nominal flow rateQ3m³/h6.3106.31016
    Thread connectionsGinch1”1/41"1/41"1/21"1/22"
    * Other values on request.
  • Precision curve - DN25/32

    This technology does not require straight length.

  • Precision curve - DN40

    This technology does not require straight length.

  • Options

    - Non-return valve
    - Pair of connectors