DN50 Digital Electromagnetic Flow Meter
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Introduction
DN50 Electromagnetic Flow Meter
Electromagnetic flow meter is one of the most popular flow meters. Flange type electromagnetic flow meter has been used for more than 50 years worldwide. It is widely used for all conductive liquids in every industry, such as water, acid, alkali, milk, slurry etc. Since founded in 2005, Q&T has sold more than 600 thousand electromagnetic flow meters to provide the solutions for clients in different work conditions.
Advantages
Electromagnetic Flow Meter Advantages and Disadvantages
The main advantages of using electromagnetic flow meter is that it is with no moving parts, no pressure loss and require very less maintenance.
Flange type magnetic flow meter can be made large size range from DN3-DN3000mm and with bi-directional flow measurement. Q&T mag flow meters are with built-in self-diagnosis function and support data record / bluetooth function and various kinds of output signals.Compared with other liquid type flow meter, the limitations of magnetic flow meter is that it can only be used for conductive liquid.Regarding non or low conductive liquid such as petroleum products, organic solvents can not be used. Electromagnetic flow meter will be affected if there’s strong magnetic filed in the surrounding environment.
The main advantages of using electromagnetic flow meter is that it is with no moving parts, no pressure loss and require very less maintenance.
Flange type magnetic flow meter can be made large size range from DN3-DN3000mm and with bi-directional flow measurement. Q&T mag flow meters are with built-in self-diagnosis function and support data record / bluetooth function and various kinds of output signals.Compared with other liquid type flow meter, the limitations of magnetic flow meter is that it can only be used for conductive liquid.Regarding non or low conductive liquid such as petroleum products, organic solvents can not be used. Electromagnetic flow meter will be affected if there’s strong magnetic filed in the surrounding environment.
Application
Flange Electromagnetic Flow Meter Installation Requirement
Electromagnetic flow meter is widely used in water treatment, food industry, pharmaceutical, petrochemical, paper mill, chemical monitoring etc.
In the metallurgical industry, it is often used to control the flow of cooling water for continuous steel casting, continuous steel rolling, and steel-making electric furnaces;
In the field of water supply and drainage in public utilities, electromagnetic flow meters are often used for the transfer measurement of finished product water and raw water in water plants;
In the pulp process of the paper industry, electromagnetic flow meters are involved in the measurement of the flow of grinding pulp, water, acid, and alkali;
In the coal industry, measuring coal washing and pipeline hydraulic conveying coal slurry.
For food and beverage industries, it is used for beer and beverage filling measurement.
For chemical and petrochemical industries, it is used to measure corrosive liquids, such as acids and alkalis etc
Electromagnetic flow meter is widely used in water treatment, food industry, pharmaceutical, petrochemical, paper mill, chemical monitoring etc.
In the metallurgical industry, it is often used to control the flow of cooling water for continuous steel casting, continuous steel rolling, and steel-making electric furnaces;
In the field of water supply and drainage in public utilities, electromagnetic flow meters are often used for the transfer measurement of finished product water and raw water in water plants;
In the pulp process of the paper industry, electromagnetic flow meters are involved in the measurement of the flow of grinding pulp, water, acid, and alkali;
In the coal industry, measuring coal washing and pipeline hydraulic conveying coal slurry.
For food and beverage industries, it is used for beer and beverage filling measurement.
For chemical and petrochemical industries, it is used to measure corrosive liquids, such as acids and alkalis etc
Water Treatment- Food Industry
- Pharmaceutical Industry
- Petrochemical
- Paper Industry
- Chemical Monitoring
- Metallurgical Industry
- Public Drainage
- Coal Industry
Technical Data
Table 1: Flange Magnetic Flow Meter Main Performances Parameters
| Size | DN3-DN3000mm |
| Nominal Pressure | 0.6-1.6Mpa(2.5Mpa/4.0Mpa/6.4Mpa…Max 42Mpa) |
| Accuracy | +/-0.5%(Standard) +/-0.3% or +/-0.2%(Optional) |
| Liner | PTFE, Neoprene, Hard Rubber, EPDM, FEP, Polyurethane, PFA |
| Electrode | SUS316L, Hastelloy B, Hastelloy C Titanium, Tantalum, Platinium-iridium |
| Structure Type | Integral type, remote type, submersible type, ex-proof type |
| Medium Temperature | -20~+60 degC(Integral type) |
| Remote type(Neoprene,Hard Rubber,Polyurethane,EPDM) -10~+80degC Remote type(PTFE/PFA/FEP) -10~+160degC | |
| Ambient Temperature | -20~+60deg C |
| Ambient Humidity | 5-100%RH(relative humidity) |
| Measuring Range | Max 15m/s |
| Conductivity | >5us/cm |
| Protection Class | IP65(Standard); IP68(Optional for remote type) |
| Process Connection | Flange (Standard), Wafer, Thread, Tri-clamp etc (Optional) |
| Output Signal | 4-20mA/Pulse |
| Communication | RS485(Standard), HART(Optional),GPRS/GSM (Optional) |
| Power Supply | AC220V (can be used for AC85-250V) DC24V (can be used for DC20-36V) DC12V (optional), Battery Powered 3.6V (optional) |
| Power Consumption | <20W |
| Alarm | Upper Limit Alarm / Lower Limit Alarm |
| Self-diagnosis | Empty Pipe Alarm, Exciting Alarm |
| Explosion Proof | ATEX |
Table 2: Flange Magnetic Flow Meter Electrode Material Selection
| Electrode Material | Applications & Properties |
| SUS316L | Applicable to industrial/municipal water, wastewater and low corrosive mediums. Widely used in petroleum, chemical industries. |
| Hastelloy B | Strong resistance to hydrochloric acids below the boiling point. Resist against oxidable acids, alkali and non-oxidable salts. For instance, vitriol, phosphate, hydrofluoric acids, and organic acids. |
| Hastelloy C | Exceptional resistance to strong solutions of oxidizing salts and acids. For example, Fe+++, Cu++, Nitric acids, mixed acids |
| Titanium | Titanium can withstand corrosive mediums such as seawater, chloride salt solutions, hypochlorite salts, oxidable acids(including fuming nitric acids), organic acids, and alkali. Not resistant to high purity reducing acids such as sulphuric acids, hydrochloric acids. |
| Tantalum | Highly resistant to corrosive mediums. Applicable to all chemical mediums except Hydrofluoric Acids, Oleum and Alkali. |
| Platinum-iridium | Applicable to all chemical mediums except for Ammonium salts and Fortis |
Table 3: Flange Magnetic Flow Meter Flow Range
| Size | Flow Range & Velocity Table | |||||||
| （mm） | 0.1m/s | 0.2m/s | 0.5m/s | 1m/s | 4m/s | 10m/s | 12m/s | 15m/s |
| 3 | 0.003 | 0.005 | 0.013 | 0.025 | 0.102 | 0.254 | 0.305 | 0.382 |
| 6 | 0.01 | 0.02 | 0.051 | 0.102 | 0.407 | 1.017 | 1.221 | 1.526 |
| 10 | 0.028 | 0.057 | 0.141 | 0.283 | 1.13 | 2.826 | 3.391 | 4.239 |
| 15 | 0.064 | 0.127 | 0.318 | 0.636 | 2.543 | 6.359 | 7.63 | 9.538 |
| 20 | 0.113 | 0.226 | 0.565 | 1.13 | 4.522 | 11.304 | 13.56 | 16.956 |
| 25 | 0.177 | 0.353 | 0.883 | 1.766 | 7.065 | 17.663 | 21.2 | 26.494 |
| 32 | 0.289 | 0.579 | 1.447 | 2.894 | 11.575 | 28.938 | 34.73 | 43.407 |
| 40 | 0.452 | 0.904 | 2.261 | 4.522 | 18.086 | 45.216 | 54.26 | 67.824 |
| 50 | 0.707 | 1.413 | 3.533 | 7.065 | 28.26 | 70.65 | 84.78 | 105.98 |
| 65 | 1.19 | 2.39 | 5.97 | 11.94 | 47.76 | 119.4 | 143.3 | 179.1 |
| 80 | 1.81 | 3.62 | 9.04 | 18.09 | 72.35 | 180.86 | 217 | 271.3 |
| 100 | 2.83 | 5.65 | 14.13 | 28.26 | 113.04 | 282.6 | 339.1 | 423.9 |
| 125 | 4.42 | 8.83 | 22.08 | 44.16 | 176.63 | 441.56 | 529.9 | 662.34 |
| 150 | 6.36 | 12.72 | 31.79 | 63.59 | 254.34 | 635.85 | 763 | 953.78 |
| 200 | 11.3 | 22.61 | 56.52 | 113.04 | 452.16 | 1130.4 | 1356 | 1696 |
| 250 | 17.66 | 35.33 | 88.31 | 176.53 | 706.5 | 1766.25 | 2120 | 2649 |
| 300 | 25.43 | 50.87 | 127.2 | 254.34 | 1017 | 2543.4 | 3052 | 3815 |
| 350 | 34.62 | 69.24 | 173.1 | 346.19 | 1385 | 3461.85 | 4154 | 5193 |
| 400 | 45 | 90 | 226.1 | 452 | 1809 | 4522 | 5426 | 6782 |
| 450 | 57 | 114 | 286.1 | 572 | 2289 | 5723 | 6867 | 8584 |
| 500 | 71 | 141 | 353.3 | 707 | 2826 | 7065 | 8478 | 10598 |
| 600 | 102 | 203 | 508.7 | 1017 | 4069 | 10174 | 12208 | 15260 |
| 700 | 138 | 277 | 692.4 | 1385 | 5539 | 13847 | 16617 | 20771 |
| 800 | 181 | 362 | 904.3 | 1809 | 7235 | 18086 | 21704 | 27130 |
| 900 | 229 | 458 | 1145 | 2289 | 9156 | 22891 | 27469 | 34336 |
| 1000 | 283 | 565 | 1413 | 2826 | 11304 | 28260 | 33912 | 42390 |
| 1200 | 407 | 814 | 2035 | 4069 | 16278 | 40694 | 48833 | 61042 |
| 1400 | 554 | 1108 | 2769 | 5539 | 22156 | 55390 | 66468 | 83084 |
| 1600 | 723 | 1447 | 3617 | 7235 | 28938 | 72346 | 86815 | 108518 |
| 1800 | 916 | 1831 | 4578 | 9156 | 36625 | 91562 | 109875 | 137344 |
| 2000 | 1130 | 2261 | 5652 | 11304 | 45216 | 113040 | 135648 | 169560 |
| 2200 | 1368 | 2736 | 6839 | 13678 | 54711 | 136778 | 164134 | 205168 |
| 2400 | 1628 | 3256 | 8139 | 16278 | 65111 | 162778 | 195333 | 244166 |
| 2600 | 1910 | 3821 | 9552 | 19104 | 76415 | 191038 | 229245 | 286556 |
| 2800 | 2216 | 4431 | 11078 | 22156 | 88623 | 221558 | 265870 | 332338 |
| 3000 | 2543 | 5087 | 12717 | 25434 | 101736 | 254340 | 305208 | 381510 |
| Remark:Suggest flow velocity range 0.5m/s – 15m/s | ||||||||
Table 4: Flange Magnetic Flow Meter Selection Guide
| QTLD | xxx | x | x | x | x | x | x | x | x | |
| Caliber | DN3mm-DN3000mm | |||||||||
| Nominal Pressure | 0.6Mpa | 1 | ||||||||
| 1.0Mpa | 2 | |||||||||
| 1.6Mpa | 3 | |||||||||
| 4.0Mpa | 4 | |||||||||
| Other | 5 | |||||||||
| Connection Mode | Flange connection | 1 | ||||||||
| Clamp connection | 2 | |||||||||
| Sanitary connection | 3 | |||||||||
| Liner Material | PTFE | 1 | ||||||||
| PFA | 2 | |||||||||
| Neoprenen | 3 | |||||||||
| Polyurethane | 4 | |||||||||
| Ceramic | 5 | |||||||||
| Electrode Material | 316L | 1 | ||||||||
| Hastelloy B | 2 | |||||||||
| Hastelloy C | 3 | |||||||||
| Titanium | 4 | |||||||||
| Platinum-iridium | 5 | |||||||||
| Tantalum | 6 | |||||||||
| Stainless steel covered with tungsten carbide | 7 | |||||||||
| Structure Type | Integral type | 1 | ||||||||
| Remote type | 2 | |||||||||
| Remote type immerse | 3 | |||||||||
| Integral type Ex-proof | 4 | |||||||||
| Remote type Ex-proof | 5 | |||||||||
| Power | 220VAC 50Hz | E | ||||||||
| 24VDC | G | |||||||||
| Output communication | Flow volume 4-20mADC/pulse | A | ||||||||
| Flow volume 4-20mADC/RS232C communication | B | |||||||||
| Flow volume 4-20mADC/RS485 communication | C | |||||||||
| Flow volume HART output/with communication | D | |||||||||
| Converter Figure | Square | A | ||||||||
| Circular | B | |||||||||
Installation
Flange Electromagnetic Flow Meter Installation Requirement
In order to obtain a stable and accurate flow measurement, it is very important that the flow meter is installed correctly in the pipe system.
Do not install the meter near equipment that produces electrical interference such as electric motors, transformers, variable frequency, power cables etc.
Avoid locations with pipe vibrations for example pumps.
Do not install the meter close to pipeline valves, fittings or impediments which can cause flow disturbances.
Place the meter where there is enough access for installation and maintenance tasks.
Do not install the meter near equipment that produces electrical interference such as electric motors, transformers, variable frequency, power cables etc.
Avoid locations with pipe vibrations for example pumps.
Do not install the meter close to pipeline valves, fittings or impediments which can cause flow disturbances.
Place the meter where there is enough access for installation and maintenance tasks.
 lnstall at the lowest point and vertical upward direction Don’t install at the highest point or vertical downward diection |  When drop is more than 5m, install exhaust valve at the downstream |
 DN50 Electromagnetic Flow Meter lnstall at the lowest point when used in open drain pipe |  Need 10D of upstream and 5D of downstream |
 DN50 Electromagnetic Flow Meter Dont’ install it at the entrance of pump, install it at the exit of pump |  DN50 Electromagnetic Flow Meter lnstall at the rising direction |
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