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Turbine Meter Series FMT-S 

  • Turbine Meter

    FMT-S

    TECHNICAL CHARACTERISTICS
    Metrological approvals: compliant with the MID T10466 – 2014/22/EU
    compliant with OIML R137 / EN 12480
    ATEX approvals: sensors compliant with Ex ia IIC T4… T6 Gb (-40°C ≤ Ta +70°C)
    encoders compliant with EX ib IIB T3… T6 Gb (-25°C ≤ Ta +55°C)
    Nominal diameters: from DN 80 to DN 800 mm (2″ to 24″)
    Pressure rates: PN 10 – 100, ANSI 150 – 600
    Flow Rates: 8 up to 2500 m³/h
    Max. working pressure: up to 100 bar depending on the body material and flanging
    Temperature Range: ATEX: -25°C to 70°C
    MID: -25°C to 70°C (lower temperatures on request)
    PED: -20°C to +70°C (lower temperatures on request)
    Materials:
    Body (Standard): low weight aluminium / steel
    Body (Optional): low temperature steel
    Straightening vane: aluminium
    Turbine wheel: aluminium
    Cartridge: aluminium
    Bearing block: stainless steel / aluminium
    Bearings: stainless steel
    Shafts: stainless steel
    Gears: Delrin
    Index frame: Aluminium
    Index frame: polycarbonate ECI

    Mounting position horizontally or vertically
    Body compliant with the Pressure Equipment Directive 97/23/EC Short length
    Removable meter cartridge
    1 x DN straight inlet section required
    Oil flushing and lubrication system
    Multipurpose exchangeable index
    Tamper proof IP67 sealed index

    INTRODUCTION

    The FMT-S turbine meters are robust and designed to perform on the highest level of accuracy. Unique for these meters is the fact they comply with all international standards and are approved for custody transfer even with smallest possible installation length. The actual flow sensor, an exchangeable cartridge, has a build-in multi stage flow conditioner enabling the meter to be installed with limited (1 x DN) straight in- and outlet sections. All tested and proved according perturbation test as per international standards. The cartridge can be pre-calibrated, under both low and high pressure conditions, then exchanged on-site. The cartridge is supported in O-rings and isolated from the body, hence unaffected by any influences of the housing. To reduce transportation cost, optimize the corrosion protection and improve safety in handling, the FMT-S series of turbine meters are also available with low weight aluminium meter bodies. As an example, the weight of a 12” (DN300) ANSI300 FMT-S is less than 45 kg..

    APPLICATIONS

    The unique FMT-S turbine meter is suitable for custody transfer gas measure- ment of all non-corrosive gases such as natural gas, propane, butane, air, nitrogen, hydrogen, etc. for low and high operating pressures. Special constructions can be supplied for use under extreme conditions like high temperatures or corrosive gases. Standard FMT-S bodies up to 8” (DN 200 mm.) ANSI150 or PN10/PN16 come with threaded flanges. Larger Sizes or higher pressure ratings up to 24” ANSI600 are available in steel. The FMT-S has a length of just 1 x DN. For flange ratings up to ANSI300 and PN40, the body is available in aluminium (steel on request). Due to the extremely low weight of these aluminium bodies, the meter can be transported easily and exchanged without special equipment.

    ACCURACY

    Each FMT-S turbine gas meter is tested with atmospheric air to traceable calibrated references. The error limits are typical half of those allowed by MID, EN standards or OIML recommendations. For pressures of above 8 bar even narrower limits are available. Optionally, meters can be calibrated with natural gas at pressures up to 100 bar, using test installations traceable to primary standards.

    TYPICAL METROLOGICAL CHARACTERISTICS
    Accuracy 0,2 Qmax to Qmax:

    ± 1% or better

    Accuracy Qmin to 0,2 Qmax:

    ± 2% or better

    Repeatability: better than 0,1%
    MEASURING RANGE

    The measuring range of the FMT-S turbine meter is determined under atmospheric conditions and meets with, and generally exceeds, the international standards. At higher operating pressures the measuring range of the turbine meters will increase since the required kinetic energy transfer to the turbine rotor occurs at lower velocities. The following equation may be used to estimate the minimum flow rate of the meter for various operating conditions.

    PRESSURE LOSS

    The average pressure loss (see tables page 6) of the FMT-S turbine meter is measured with atmospheric natural gas with a relative density of 0.6 at one (1) diameter upstream to one (1) diameter downstream of the meter on straight pipe of the same size as the meter. The pressure loss across the FMT-S turbine meter for various gases and other operating pressures may be approximated from the following equation.

    INSTALLATION

    The FMT-S fulfills all the requirements of the European and International directives. In particular those of the OIML, ISO and EN. With the special in- tegrated flow straightener, the FMT-S turbine meter eliminates the effect of severe perturbations with an straight inlet and outlet piping of 1 X DN. This permits the design of very compact installations without losing accuracy.

    INDEX

    The basic index consists of an UV-resistant polycarbonate cover, glued (IP67) to an aluminium frame. The aluminium frame will give strength to the index and as such sufficient protection against mechanical interference (Tampering). The index can be rotated over 3500 for all directions. The index can be equipped with multiple LF switches (Reed or Wiegand principle), “Normally Closed” tamper contacts and encoder technology. The LF pulsers and its driving magnet are shielded to overcome tampering with an ex- ternally applied magnetic field. Magnetic fields up to 500 mT will not have an effect on the pulse counting. The index can be equipped with several options making the meter prepared for the future.

    DOUBLE REED PLUS NORMALLY CLOSED CONTACT:

    all basic indexes are equipped with an double reed and a normally closed contact. Reverse Flow Lock: In order to avoid tampering by reverse flow, the index or instrument drive can be equipped with a Reverse Flow Lock.

    WIEGAND PULSERS:

    The Index can be equipped with multiple Wiegand pulsers. The Wiegand pulsers do have significant advantages over the traditionally used Reed contacts. Wiegand sensors do not face “bouncing” problems and the actual live time is not limited as much as the traditional Reed contacts.

    INTELLIGENT INDEX/ENCODER:

    The index can be equipped with an intelligent encoder. The encoder sends out the total volume with an interval of 400 msec. The encoder uses a standard NAMUR serial data format, and can be modified to special applica- tions on request. The encoder is powered by one AA cell battery guaran- teed for 12 years of operation. On request two AA cells can be installed for a guaranteed life time of 20 years. The encoder is equipped with a special Hall sensor to detect and register interferences from external magnets. Several programmable inputs/outputs are available for advanced – anti fraud – functions.

    LUBRICATION

    The FMT-S series incorporates high quality precision bearings. For optimal performance and long life time, it is recommended that the bearings are flushed and lubricated on a regular base. FMT series of turbine meters can be equipped with several types of lubrication systems or with life time lubrication. FMG recommends to use the lubrication systems. In case of a lubrication system, an integrated splash vane will distribute the oil to all the moving parts and will flush the bearings. Recommendations as to when

    to lubricate turbine meters varies by product type, operating conditions, customer procedures, and regulatory requirements. Meter performance is optimized by flushing contamination from the bearings and refreshing or adding of oil during operation.

    HEAVY DUTY BEARINGS

    Since the forces on the main bearings are directly related to the density (operating pressure) of the gas, the FMT-S series incorporates bearings dedicated to the working pressure. FMT-S(w) turbine meters which have a low working pressure are equipped with lighter bearings then the meters which are used at higher working pressures. This way, the best measuring ranges and life times can be guaranteed.

    HIGH FREQUENCY SENSORS

    FMT-S Turbine meters can be equipped with several types of high frequency sensors.

    HF MAIN SHAFT:

    this high frequency sensor generates two independent phase shifted sig- nals and as such the flow direction can be monitored. The signal generated complies with Namur.

    HF TURBINE WHEEL:

    this HF sensor can be used to check the condition of the turbine wheel (miss- ing blades) by comparing the pulses with the HF main shaft.

    For both sensors, the electrical separation between the hazardous and non- hazardous areas is accomplished by an intrinsically safe isolation amplifier

    TECHNICAL DATA

        Flange Type Dimensions Weight (kg)
    Size G-value Q-max Q-min dp (NG)* NF HF HF ALU Steel Steel Steel
    (mm) (-) (m³/h) atmospheric air 4bar NG 8 bar NG Main** Wheel** C E H L*** (kg) (kg) (kg) (kg)
    (m³/h) (m³/h) (m³/h) (Pa) (imp/m³) (imp/m³) (imp/m³) (mm) (mm) (mm) (mm) < 21bar < 21 bar < 51 bar < 101 bar
    50 G100 160  8  5  3  900 1  22560  67675 155 175 150 8 17 17 17
    G160 250 13 8 5 900 1 8235 28815 155 175 150 8 17 17 17
    G250 400 20 13 8 900 1 5180 20705 155 175 150 8 17 17 17
    80 G100 160  8  5  3  900 1  1845  64540 175 95 175 120 8 27 27 27
    G160 250 13 8 5 900 1 22650 67675 175 95 175 120 8 27 27 27
    G250 400 20 13 8 900 1 8235 28815 175 95 175 120 8 27 27 27
    100 G160 250 13 8 5 900 1 8025 24065 192 112 185 150 11 47 47 55
    G250 400  20 13 8 900 1 3915 13700 192 112 185 150 11 47 47 55
    G400 650 32 20 13 900 1 2340 9350 192 112 185 150 11 47 47 55
    150 G400 650 32 20 13 900 1 4475 6715 212 138 212 175/180 19 79 79 102
    G650 1000 50 32 20 900 1 2950 5165 212 138 212 175/180 19 79 79 102
    G1000 1600 80 50 32 1600 0.1 1435 2865 212 138 212 175/180 19 79 79 102
    200 G650 1000 50 32 20 900 1 2950 5165 243 168 238 200 26 86 112 152
    G1000 1600 80 50 32 900 0.1 1435 2865 243 168 238 200 26 86 112 152
    G1600 2500 125 80 50 1600 0.1 885 1770 243 168 238 200 26 86 112 152
    250 G1000 1600 50 32 900 0.1 775 2320 236 en-table 282 250/375 124 162 244
    G1600 2500 80 50 900 0.1 440 1310 236 282 250/375 124 162 244
    G2500 4000 130 80 900 0.1 440 1310 236 282 250/375 124 162 244
    300 G1600 2500  80 50 900 0.1 440 1320 236 283 300/450 175 225 303
    G2500 4000 130 80 900 0.1 245 740 236 283 300/450 175 225 303
    G4000 6500 200 130 900 0.1 245 740 236 283 300/450 175 225 303
    400 G2500 4000 130 80 900 0.1 220 655 295 328 400/600 292 384 530
    G4000 6500 200 130 900 0.1 125 370 295 328 400/600 292 384 530
    G6500 10000 320 200 1600 0.1 125 370 295 328 400/600 292 384 530
    500 G4000 6500 200 130 900 0.1 95 285 375 380 500/750 342 492 704
    G6500 10000 320 200 900 0.1 54 162 375 380 500/750 342 492 704
    G10000 16000 500 320 1600 0.01 54 162 375 380 500/750 342 492 704
    600 G6500 10000 320 200 900 0.1 28 84 425 430 600/900 511 749 1009
    G10000 16000 500 320 900 0.01 28 84 425 430 600/900 511 749 1009
    G16000 25000 800 500 1600 0.01 28 84 425 430 600/900 511 749 1009

    * dP, is measured under atmospheric conditions with natural gas with relative density of 0.6 (air=1)
    ** Values may vary 5% due to machining tolerances
    *** Different lengths on request

    Values can vary by up to 5% due to fabrication tolerances

      Wafer type Dimensions Weight (kg)
    Size G-value  C E H L*** ALU Steel
    (mm) (-) (mm) (mm) (mm) (mm) (kg) (kg)
    50 G100 155 175 150 8 17
    G160 155 175 150 8 17
    G250 155 175 150 8 17
    80 G100 175 95 175 120 7 27
    G160 175 95 175 120 7 27
    G250 175 95 175 120 7 27
    100 G160 192 112 185 150 8 55
    G250 192 112 185 150 8 55
    G400 192 112 185 150 8 55
    150 G400 212 138 212 175/180 12 102
    G650 212 138 212 175/180 12 102
    G1000 212 138 212 175/180 12 102
    200 G650 243 168 238 200 15 152
    G1000 243 168 238 200 15 152
    G1600 243 168 238 200 15 152
    250 G1000 236 en-table 282 250 43 244
    G1600 236 282 250 43 244
    G2500 236 282 250 43 244
    300 G1600 236 283 300 51 303
    G2500 236 283 300 51 303
    G4000 236 283 300 51 303
    400 G2500 295 328 400 93 530
    G4000 295 328 400 93 530
    G6500 295 328 400 93 530
    500 G4000 375 380 500 133 704
    G6500 375 380 500 133 704
    G10000 375 380 500 133 704
    600 G6500 425 430 600 176 1009
    G10000 425 430 600 176 1009
    G16000 425 430 600 176 1009