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梦之城娱乐平台_CITY OF DREAM【官方彩票】
Summary
The electromagnetic flowmeter is composed of two parts by electromagnetic flow sensor and electromagnetic flow converter.The operation of an electromagnetic flowmeter is based on Faraday law of electromagnetic induction.The mainly parts of the sensor are: measuring tube,electrode poles,excitation coil,iron core,yoke and housing. The measuring tube of the sensor is a short alloy tube whose diameter is D, the inner surface of it has an insulating liner.Two electrodes are fixed in the measuring tube along with the diameter direction of it and they usually flush with the inner surface liner.When excitation coil pulsed by two-way square wave,there generates a working magnetic field with a flux density B in the vertical direction of the measurement axis.In the meantime,if some electrical conductivity liquid flows at an average velocity V through the measuring tube ,cuts lines of the magnetic field,there generates induced electromotive force E.Electromotive force E is directly proportional to the product of flux density B、measuring tube diameter D and average velocity V,that's: E BVD. Electromotive force E(flow signal) is measured by the electrodes and transmitted to transducer through cable.After the transducer handles the flow signal by magnifying it, the flow and total amount can be displayed,also will output pulse and analog current etc.
Main technical parameters

◆ Technical parameters of whole flowmeter and sensor

Chart 1
Carried Standard ANSI/DIN/JIS
DN 3.6.10.15.20.25.32.40.50.65.80.100.125.150.200.250.300.350.400.450.500.
600.700.800.900.1000.1200.1400.1600.1800.2000.2200.2400.2600.2800.3000
Max.Flow Velocity 15m/s
Accuracy ±0.5% of indicating value(flow velocity 0.8m/s); ±4mm/s(flow velocity<0.8m/s )
Fluid Conductivity ≥5uS/cm
Nominal Pressure 4.0MPa 1.6MPa 1.0MPa 0.6MPa 6.3,10MPa etc.
DN3~DN150 DN15~DN600 DN200~DN1000 DN700~DN3000 Special Ordering
Lining Material PTFE,Poly neoprene,Polyurethane,F46,PFA with net
  Sensor -25 deg.C~+60 deg.C
Convertor and integrated type -10 deg.C~+60 deg.C
Fluid Max.Temperature Integrated type 70 deg.C
Separated type Poly Neoprene Lining 80 deg.C;120 deg.C(notes in order)
Polyurethane Lining 80 deg.C
PTFE Lining 100 deg.C;150 deg.C(notes in order)
FEP Teflon
PFA with net
Material of signal electrode and ground electrode SS316L,HastelloyB,HastelloyC,Ti,Ta,Platinum-iridium alloy,Stainless steel coating with tungsten carbide
Electrode drawknife apparatus DN80~DN3000
Connection flange material Carbon steel
Connection ring material Stainless steel1Cr18Ni9Ti
Enclosure protection ND15~DN3000 separated sensor with rubber or PU lining IP65 or IP68
Integrated(rounded converter) IP65
Other sensors and separated converter IP65
Explosion proof sensor and converter IP65
Spacing(separated type) Normally the separation distance between converter and sensor is less than 100m,if more please order specially.(Note: our company provide 10m length standardly,if need more, please indicate the length in order, and the cost will be add more)
Output of analog current 0~10mA     load resistance 0~1.5Ω
4~20mA     load resistance 0~750Ω
Frenquency output 1~5000Hz
Pulse output Separated type output by two way: forward and reverse flow; integrated type output one way
Frenquency range:0~5KHz,uper limit 1~5 optionally
Square wave or pulse with 25ms pulse width
Transistor switch output with isolation protection,can absorb 250mA current and withstanding 35V voltage
Two-path alarm output Alarmable(programable)high/low flow,blank pipe,fault condition,forward and reverse flow,simulation volume exceeds range,pulse volume exceeds range,disconnect pulse small signal
Transistor switch output with isolation protection,can absorb 250mA current and withstanding 35V voltage(Not isolated with pulse output)
Digital communications RS232,RS485,HART(add specially)
Explosion proof mark Integration ExdeiaⅡCT4
Separated Exd[ia] ⅡCT4(converter)     ExdeiaⅡCT4(sensor)
[Type Selection]
LDG □□□ □□ □□ □□
│   │    │  │ ││  ││   │  │  │
a    b     c   d  e f   g h    i   j   k

a. Connect type
A Flange connection
B Clamping connection
                                            e. electrode material
1.Stainless steel 0Cr18Ni12Mo2Ti
2.HastelloyB
3.HastelloyC
4.Titanium
5.Platinum-iridum alloy
6.Tantalum
b. Nominal bore(mm)
Code    DN      Code    DN      Code    DN
015     15        250      250      10A      1000
020      20        300      300      12A      1200
025      25        350      350      14A      1400
040      40        400      400      16A      1600
050      50        450      450      18A      1800
065      65        500      500      20A      2000
100      100      600      600      22A      2200
150      150      700      700      24A      2400
200      200      800      800      26A      2600
900      900      28A      2800
30A      3000
                                              f. Shell protection
1.IP65
2.IP68+IP65(IP68sensor+IP65converter)(c only can select 2,3;g only select 0;i only select CR;K only select 01,02)
3.IP67(c only select 2,3;g only select 0;i only select CH; k only select 02)
g. Explosion-proof mark
0.Nothing
1.Integrated type (f only select 1,k only select 03)
2.Separated type (f only select1,k only select 02)
  • Nominal pressure(MPa)
  • 06        0.6           (DN700~DN3000)
    10        1.0           (DN15~DN1000)
    16        1.6           (DN15~DN600)
    40        4.0           (DN15~DN150)
    xx for special order
                                                 h.Accessory
  • Nothing
  • Grounding electrode(DN25~DN3000)
  • Grounding ring(DN15~DN3000)
  • Electrode scraper structure(DN80~DN3000)
  •                   i. Structure
    CR Divided type
    CH Integrated type
    j. Power supply
    1.85~265V  AC  45~400Hz
    2.16~40V DC  3.Lithium battery
  • lining material
  •   1.FTFE(F4)                (DN15~DN1000)
    2.Polychloroprene        (DN15~DN3000)
    3.Polyurethane             (DN15~DN600)
    4.FEP(F46)                 (DN15~DN250)
    5.screened PFA           (DN50~DN250)
    k. Converter type
    01.Square separated type/single current/dipluse/double knock
    02.Round separated type/single current/dipluse/double knock
    03.Round integrated type/single current/single pulse/double knock
    04.Square integrated type/single current/single pulse/double knock
    Notes: 1. Communication protocol: RS232,RS485.HART optional
    2.Batch control function optional
    3.GPRS remote monitoring function optional


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