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Rotary Gas meter Series FMR with Bypass 

  • Rotary Gas meter

    Series FMR with Bypass

    TECHNICAL CHARACTERISTICS
    Materials:
    Pressurized components: anodized Aluminium
    Further: Stainless steel
    Available springs: 125 , 250 and 500 mBar
    further upon request
    Connection: Canon 3-pins Plugs

    integrated into the meter
    high pressure up to PN16
    can be unlocked on-site
    double redundant
    full thru-flow capacity
    analogue differential pressure

    FUNCTION

    Rotary gas meters are deployed over a large measurement range in a wide variety of applications because of their reliability and exactness. Unlike other gas meters such as turbine gas meters and ultrasonic gas meters, a rotary gas meter always measures with superior exactness, as long as the pistons are not blocked.
    In case of a piston blockade, there is no gas thruflow as long as no precutionary measures have been made!
    The easiest and safest precautionary measure is an automatic bypass valve which is integrated directly into the meter.
    An integrated bypass guarantees the necessary security of supply because the bypass automatically opens as soon as the differential pressure in the meter has reached a previously defined value.
    All FMR rotary gas meters can be fitted with an automatic bypass.
    The mechanism in the bypass operates at a high force level (large membrane and strong springs), and as a result, the bypass is highy reliable over the expected period of service life. Assisted by 2 reed contacts (one closed one opened) the status of the valve can among others, be monitored via volume conversion.
    The bypass itself consists of a housing made from anodised aluminium which is attached to the rear side of the meter by means of an interface connection made of stainless steel.
    From time to time in isolated cases, the owner/operator opens the inlet or outlet valve too quickly, so that the bypass is sometimes triggered. If this does happen, then the bypass can be reset on location. A removable plug enables access to the reset mechanism.
    In the case of a triggered bypass, this can be reset manually after releasing pressure in the meter. To reset the valve, firstly the officially sealed plug for the reset mechanism has to be removed (see illustration).
    Now the bypass can be closed again.
    FMG offers a range of springs for different set values for the individual differential pressure settings (see technical data).

    Pressure loss in mbar
    Thru-flow
    m³/h
    Operating pressure in bar g
    0,1 0,5 1,0 2,0 4,0 8,0 12,0 16,0
    G16 to G160 in 171 mm
    25 5 7 9 14 23 41 59 77
    40 12 17 23 35 58 104 150 196
    65 30 46 61 91 152 274 395 517
    100 72 108 144 216 360 648 936 1224
    160 184 276 369 553 922 1659 2396 3133
    G100 to G400 in 241/260 mm
    65 10 14 17 24 48 80 115 150
    100 24 32 41 57 107 190 272 355
    160 61 83 104 146 273 485 697 909
    250 150 202 253 357 667 1184 1702 2219
    400 384 516 649 914 1708 3032 4356 5681
    CALCULATION OF PRESSURE LOSS
    • dp = C · P · Q²
    • with: dp: pressure loss in mbar
    • C: coefficient
      • 171mm: 0,0072
      • 241mm: 0,0024
    • P: absolute pressure in bara
    • Q: thru-flow in m³/h
  • Conversion of diaphragm gas meters to rotary gas meter series

    Ready-to-install, commissioned sets for converting

    • From single-tube meters with T-piece into rotary meters
    • From 2-pipe diaphragm gas meters with horizontal connections into rotary gas meters
    • From 2-pipe diaphragm gas meters with vertical connections into rotary gas meters/li>

    Important! For flanges DN65/ DN80, PN16, please indicate whether they have 4 or 8 holes!

    Technical characteristics
    The conversion kits comprise:
    • 2 pipe fittings, welded and tested for strength and leak tightness
    • Gaskets to the meter and to the existing connection flanges
    • Bolts for the meter and to the existing connection flanges
    Pressure rating: PN16/ 5 bar
    Material:
    • Pipe fitting: P250GH/ P235GH
    • Gaskets: Klingersil or comparable., others on request
    • Bolts: 5.6/ 5-2, others on request
    Stamping/ certificates
    • Pipe fitting:  DIN EN 10204 3.1 certification with stamping and verfication of strength and pressure test PN5
    • Bolts: with quality and manufacturer’s mark
    Prices
    Bitte kontaktieren Sie uns unter info@tecon-systemtechnik.de oder +4926196389744. Danke!

    The following information is required for assambling the conversion kits:

    • Design of the existing diaphragm gas meter (1-pipe/ 2-pipe horizontal or 2-pipe vertical)
    • DN, PN and dimension L1 of the existing connecting flanges
    • DN, PN and dimension L2 of the planned rotary gas meter
    • Specification the required RAL color (e.g. 1012 Lemon Yellow or 7035 Light Grey, etc.)

    Examples of common conversion kits:

    • 2-pipe DGM, vertical, DN65 (4-hole), PN16, L1=510 mm to RGM DN50, PN16, L2=150 mm
    • 2-pipe DGM, vertical, DN65 (4-hole), PN16, L1=510 mm to RGM DN50, PN16, L2=171 mm
    • 2-pipe DGM, vertical, DN80 (8-hole), PN16, L1=510 mm to RGM DN50, PN16, L2=240 mm/li>
    • 2-pipe DGM, vertical, DN80 (8-hole), PN16, L1=640 mm to RGM DN50, PN16, L2=240 mm
    • 2-pipe DGM, vertical, DN100, PN16, L1=710 mm to RGM DN80, PN16, L2=240 mm
    • 2-pipe DGM, vertical, DN100, PN16, L1=710 mm to RGM DN80, PN16, L2=171 mm
    • 2-pipe DGM, horizontal, DN65 (4-hole), PN16, L1=574 mm to RGM DN50, PN16, L2=150 mm
    • 2-pipe DGM, horizontal, DN65 (4-hole), PN16, L1=574 mm to RGM DN50, PN16, L2=171 mm
    • 2-pipe DGM, horizontal, DN80 (8-hole), PN16, L1=574 mm to RGM DN50, PN16, L2=150 mm
    • 2-pipe DGM, horizontal, DN80 (8-hole), PN16, L1=574 mm to RGM DN50, PN16, L2=171 mm
    • 2-pipe DGM, horizontal, DN80 (8-hole), PN16, L1=684 mm to RGM DN50, PN16, L2=150 mm
    • 2-pipe DGM, horizontal, DN80 (8-hole), PN16, L1=684 mm to RGM DN50, PN16, L2=171 mm
    • 2-pipe DGM, horizontal, DN100, PN16, L1=804 mm to RGM DN80, PN16, L2=171 mm
    • 2-pipe DGM, horizontal, DN100, PN16, L1=804 mm to RGM DN80, PN16, L2=240 mm
    • Single-pipe DGM, DN65 (4-hole), PN16, L1=344 mm to RGM DN50, PN16, L2=150 mm
    • Single-pipe DGM, DN65 (4-hole), PN16, L1=344 mm to RGM DN50, PN16, L2=171 mm
    • Single-pipe DGM, DN80 (8-hole), PN16, L1=384 mm to RGM DN50, PN16, L2=150 mm
    • Single-pipe DGM, DN80 (8-hole), PN16, L1=384 mm to RGM DN50, PN16, L2=171 mm
    • Single-pipe DGM, DN100, PN16, L1=434 mm to RGM DN80, PN16, L2=171 mm
    • Single-pipe DGM, DN100, PN16, L1=434 mm to RGM DN80, PN16, L2=240 mm
    What Price
    We can also offer suitable conversion kits for replacing turbine meters with rotary meters. on request
    The design of the required rotary meter is available on request. on request
    A suitable rotary meter can also be offered. on request