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Electromagnetic Flow Meter / EMFM-HFD3000
- Electromagnetic flow metersare widely used now in different industries such as water/wastewater, chemical industry, metallurgy, paper-making, pharmaceutics, food etc.
Product features:
● There are no moving parts in pipeline to impede the flow stream so there is almost no pressure loss in measurement.
● Measurement result will not be affected by physical parameters such as flow velocity distribution, fluid pressure, temperature, density, viscosity.
● Measurement range can be modified on the working spot according to customer’s actual requirement.
● High definition backlight LCD display .Pure English menu .Operation is simple and it is easy to understand and use the instrument.
● Adopting of SMD device and SMT technology assures high circuit reliability.
● There are three totalizers displaying positive flow, reverse flow and net flow and there is an inner recorder for at most 16 times power failure time.
● RS485, RS232, HART and Modbus communication output.
Technical Parameters
Nominal Bore: Electrode Material: Accuracy: Lining material: Electrode Forms: Conductivity: Flow rate scope: Medium Temperature: Rated Pressure: Flange Standard: Flange Material: Housing Material: Output Signal: Cable Interface: Protection Grade: Explosion proof Grade: Installation Type Power Supply Voltage: Power Consumption: | DN6-DN2000 Mo2Ti,Hc,Hb,Ta,Pt ±0.5%,±1.0%(based on pipe size) Teflon、Neoprene、Polyurethane、acid-proof rubber Fixed form Not less than 5μs/cm 0.2～11m/s selectable 25℃～180℃ 0.25Mpa-32Mpa GB9115-88（DIN2051，BS4504） Carbon steel, stainless steel Carbon steel ,stainless steel 4-20mA current、0-1kHz frequency、RS485 PG10 Sensor：IP65、IP67、IP68 Exmdib IIBT4 Integrated type／Remote type 185VAC-265VAC，18VDC-36VDC ≤15W |
Measurement range
Bore Size | Nominal bore | Measurement range (0.1m/s～10m/s) | ||
| (mm) | (inch) | (m3/h) | (GPM) |
Small bore | 25 | 1 | 0.176 ～ 17.6 | 0.775 ～ 78.0 |
| 32 | 1-1/4 | 0.289 ～ 28.9 | 1.28 ～ 128 |
| 40 | 1-1/2 | 0.452 ～ 45.2 | 1.99 ～ 200 |
| 50 | 2 | 0.706 ～ 70.6 | 3.11 ～ 310 |
| 65 | 2-1/2 | 1.196 ～ 119.6 | 5.28 ～ 528 |
| 80 | 3 | 1.8 ～ 180 | 7.93 ～ 800 |
| 100 | 4 | 2.82 ～ 282 | 12.42 ～ 1250 |
| 125 | 5 | 4.41 ～ 441 | 19.45 ～ 1945 |
Medium bore | 150 | 6 | 6.36 ～ 636 | 28.02 ～ 2800 |
| 200 | 8 | 11.3 ～ 1130 | 50.04 ～ 5000 |
| 250 | 10 | 17.6 ～ 1760 | 77.84 ～ 7750 |
| 300 | 12 | 25.4 ～ 2540 | 112.07 ～ 11200 |
| 350 | 14 | 34.6 ～ 3460 | 152.56 ～ 15200 |
| 400 | 16 | 45.2 ～ 4520 | 199.25 ～ 20000 |
Large bore | 500 | 20 | 70.7 ～ 7070 | 311 ～ 31100 |
| 600 | 24 | 102 ～ 10200 | 448 ～ 44800 |
| 700 | 28 | 139 ～ 13900 | 610 ～ 61000 |
| 800 | 32 | 181 ～ 18100 | 797 ～ 79700 |
| 900 | 36 | 229 ～ 22900 | 1000 ～ 100000 |
| 1000 | 40 | 283 ～ 28300 | 1240 ～ 124000 |
Selection principle:
The measured fluid must be conductive liquid or slurry. Its conductivity shall not be less than 5μs/cm, and the measured fluid shall not contain much ferromagnetic substance or air bubbles. The suitable pressure ,grade, lining material, electrode material, and the instrument structure shall be selected in accordance with the characters of the temperature, working pressure, corrosiveness, abrasiveness, etc. of the measured fluid.
Nominal bore selection:
It would be best if the measured fluid flow velocity is between 0.3-15m/s since in such cases flow meter bore can be selected same as user’s pipeline diameter.
If the measured fluids flow velocity is lower than 0.3m/s, then in the flow meter position flow velocity can be partially increased to ensure high accuracy(by selecting a smaller flow meter bore size).
Selection of electrode and grounding ring material
Electrode material should be selected according to the measured fluids’ corrosiveness.Material | Anti-corrosion features |
Stainless steel containing Mo | Used for industrial water, city water, wastewater, media with weak corrosiveness like Nitric acid、＜5% sulfuric acid in room temperature、boiling phosphoric acid 、formic acid、aqueous alkali、and under certain pressure of sulphurous acid, sea water, acetic acid |
Hastelloy C | oxidizing acid、oxidizing salt、sea water、non- oxidizing acid, non-oxidizing salt、alkali、normal temperature sulfuric acid |
Titanium(Ti) | It can be proof against corrosion of sea water, various kinds of chlorides and hypochlorite, oxidizing acid (including fuming nitric acid),organic acid, alkali, etc., while not proof against corrosion of purer reductive acid (e.g. sulfuric acid, hydrochloric acid).But, if the acid contains oxidizing agents (e.g. nitric acid),the corrosiveness will be greatly reduced. |
Tantalum(Ta) | It has good corrosion resistance property. It can resist corrosion of almost all chemicals including hydrochloric acid, nitric acid, sulfuric acid and aqua regia except hydrofluoric acid, fuming sulphuric acid, and alkali. |
Platinum(Pt) | Almost suitable for all chemical substance not include aqua regia and ammonium salt. |
Lining material selection
Lining material should be selected according to measured fluid corrosiveness, abrasiveness and temperature.| Lining material | Name | Code | Property | Highest working temperature | Applicable liquid |
Rubber | Neoprene, |
| Medium in abrasion resistance. Resist corrosion of ordinary low concentration acid, alkali and salt. | ＜80℃ | Running water、industrial water、sea water |
Polyurethane |
| Excellent in abrasion resistance. Worse in corrosion resistance of acid or alkali. | ＜60℃ | Serous fluids like paper pulp、ore pulp | |
Fluorine plastic | Polytetrafluor ethylene | F4 or PTFE | Stable in chemical properties. Resist corrosion of boiling hydrochloric acid, sulfuric acid ,aqua regia ,concentrated alkali | ＜180℃ | Strong corrosive liquids of acid, alkali and salt |
tetrafluo- roethylene and hexafluoropropylene | F46 or FEP | Chemical properties are slightly inferior to F4 |
| Corrosive liquids of acid, alkali and salt | |
Plastic |
Tetrachloro ethylene and ethylene | F4 or ETFE | Chemical properties are slightly inferior to F4 |
| Corrosive liquids of acid, alkali and salt |
polythene | PO | Stable in chemical properties | ＜60℃ | Waste water | |
polyphenylene sulfide | PPS |
| ＜150℃ | hotwater |
Selection code
Mode:HFD3000-- |
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Inside nominal diameter |
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Structure form | Integrated type | Y |
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Remote type | F | ||||
Lining material | Rubber,Neoprene, Polyurethane |
| 1 | ||
Fluorine plastic (Teflon ) |
| 2 | |||
Plastic (ETFE or PPS) |
| 3 | |||
Electrode material | Stainless steel OCr18Ni12Mo2T |
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| SS |
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HB(Hastelloy B),HC(Hasterlloy C) |
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Ti ( Titanium) |
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| Ti |
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Ta ( Tantalum) |
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| Ta |
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Pt (Platinum) |
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| Pt |
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Earth electrode material | Stainless steel OCr18Ni12Mo2T |
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| SS |
HB(Hastelloy B),HC(Hasterlloy C) |
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| H | |
Ti ( Titanium) |
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| Ti | |
Ta ( Tantalum) |
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| Ta | |
Pt (Platinum) |
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| Pt |
Integrated type Remote type
