RAY FS WP 456/457

RAY FS WP 456/457



Volume measuring component for measuring heat.


  • Facility for remote transmission of flow rates
  • Encapsulated and evacuated counter
  • Counter can be rotated as required for easier reading
  • Easily replaceable reed switch
  • The reed switch is fitted with a 100 Ω, ¼ W protective resistor (cable length 3 m). Can be ordered without series resistor
  • Contact rating (without series resistor) max. 24 V (SELV) 0.2 A
  • Outstanding long-term accuracy achieved by mounting vane in ring saphire and carbide bearing
  • Sealed shield protects against magnetic interference
  • Very low pressure loss
  • Approved according MID in class 2 and 3
  • Completely dry-running
  • General
    Mounting positionAny position
    Medium temperature range°C10 ... 105
    Ambient temperature°C5 ... 55
    Ambient classE1 + M1
    Nominal pressurePNbar161
    Protection classIP 54
    ApprovalMID (DE-15-MI004-PTB004)
    1 special version on request
  • Reach

    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)

  • Technical data
    Nominal diameterDNmm506580100125150200
    Nominal flow rateqpm3/h1525325080200200
    Overload flow rate (short term)m3/h606090180250400500
    Maximum flow rateqsm3/h303045100150300300
    Minimum flow rateqim3/h1.52.53.2582020
    Starting flow ratel/h13013040040060015002000
    Pressure loss at qpΔpbar0.
    Flow resistance coefficient Zeta0.90.90.651.91.810.13
    Pulse value reed switch 1l/pulse100100100100100100100
    Metrological classqp / qi10:1 210:1 210:110:110:110:110:1
    Flow rate at 0.1 bar pressure lossm3/h3556102911502801414
    1 other pulse values on request
    2 other qp / qi on request
  • Display range
    Nominal diameterDNmm506580100125150200
    0.5 l ... 999,999 m³
    5.0 l ... 9,999,999 m³
  • Dimensions
    Nominal diameterDNmm506580100125150200
    Overall lengthLmm200200200 / 225250250300350
    Flange diameterDmm165185200220250285240
    Hole circle diameterKmm125145160180210240295
    Number of screwholespcs4488888 / 12
    Screwhole diameterD1mm18181818182222
    Height (without counter extension)H1mm141141141200200244244
    Height (with counter extension)H1mm182182182240240284284
  • Pressure loss graph / Typical error graph

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