Food Sanitary Beverage Electromagnetic Flow Meter with High
Performance
1. Introduction
MLF electromagnetic flowmeter works according to Faraday's law of
electromagnetic induction, and is composed of sensors and
converters. Used to measure the conductivity of liquid or solid. In
general, its conductivity should be greater than 5μs/cm (tap water
and raw water conductivity is about 100 ~ 500μs/cm), and it can
also be used to measure acid, alkali, brine, pulp or pulp and other
media. However, these media cannot contain a large amount of
magnetic substances and bubbles.
MLF electromagnetic flowmeter is an instrument for measuring liquid
fluidity. Widely used in metallurgy, chemical industry, paper
making, environmental protection, petroleum, textile, food, urban
management, water plant and other industries.
2. Quick Details
1) It is high resistance, fast response design can make undistorted
collection of weak signal and fast response to the flow changes.
Its range rate can reach 100:1.
2) MLF electromagnetic flowmeter is explosion-proof design.
3) Low conductivity measurement function.
4) There are nine language options to meet the needs of different
customers.
5) It has self-regulation function and self-test.
6) Different outputs are optional: Hart, RS485, Profibus, 4-20mA,
frequency, pulse.
3. Selection of Liner Material
| Liner Material | Main Performance | Application |
| PTFE | 1 The most stable chemical properties in plastics, resistant to
boiling hydrogen chloride and sulfuric acid, nitric acid, aqua
regia, strong bases and various organic solvents, but not resistant
to the corrosion of chlorine trifluoride, high temperature nitrogen
trifluoride, liquid fluorine, liquid oxygen and ozone. 2 Low wear resistance. 3 Low negative pressure resistance. | 1. -25~140℃ 2. Strong corrosion medium, like strong acid and alkali 3. Healthcare medium |
| CR | Oil proof, solvent resistance, oxidatite resistance and the
resistance to the erosion of common medium like acid, alkali, salt,
etc. | 1. ＜80℃ 2. Be able to measure sewage and mud |
| PU | 1. Very good abrasive resistance, flexibility. 2. Low acid and alkali resistance. | 1. ＜65℃ 2. Neutral strong abrasion resistance medium |
| Hard Rubber | 1.Room temperature, hydrochloric acid, acetic acid, oxalic acid,
ammonia, phosphoric acid and 50% sulfuric acid, sodium hydroxide,
potassium hydroxide 2. Avoid strong oxidizing agents | 1. ＜80℃ 2. General acid, alkali, salt solution |
| PFA | 1. Can be used for most corrosive medium like acides, alkalis, and
strong oxidant. 2. High material strength, resistance to aging, better than PTFE,
EFP in high temperature 3. Injection molding for higher negative pressure | 1. 40~180℃ 2. Strong corrosion medium, like strong acid and alkali 3. Healthcare mdium |
| FEP(F46) | 1. Hydrophobicity and non-viscous 2. Corrosion resistance is inferior to PFA 3. Negative pressure | 1. 40~180℃ 2. Strong corrosion medium, like strong acid and alkali 3. Healthcare mdium |
4. Selection of Electrode Materials
| Electrode Material | Main Performance |
| 316L | Good resistance to the corrosion of nitric acid, ＜5% sulfuric acid
under room temperature, acetic acid, alkaline fluid, sulfite under
certain pressure, seawater and scetic acid, etc. It can be widely
used in petrochemical urea, vinylon. |
| Hb | Good resistance to all concentrations below the boiling point of
hydrochloric acid, but also resistant to non-oxidizing acid,
alkali, sulfuric acid, phosphoric acid, hydrofluoric acid, organic
acid corrosion. |
| Hc | Corrosion of oxidizing acids, such as nitric acid, mixed acids. A
mixture of chromic acid and sulfuric acid, oxidized salts, such as
Fe3,Q3, and some other oxidants, such as a mixture of hypochlorite
solution and seawater above normal temperature. |
| Ti | Resistant to corrosion of seawater, various chlorides,
hypochlorite, oxidizing acids (including fuming nitric acid),
organic acids or bases, but not pure reductive acids (e.g.,
sulfuric acid, hydrochloric acid) etc. but if the acid contains
oxidants (such as nitric acid, Fe3,Q3), the corrosion resistance
will decrease. |
| Ta | Good corrosion resistance similar to glass. Resistance to the
corrosion of chemical medium(including hydrochloric acid and
fumiing sulfuric acid), but can not be used for sodium hydromide
fluid. |
| Pt-Ir | Have good corrosion resistance of all acid, and can be resistance
to the corrosion of alkali, all salt except aqua regia, ammonium
slat and few other medium |
| Tungsten Carbide | For pulp and sewage, good resistance to solid particle
interference. |
5. Dimensional Sketches
a. Dimension of Converter
Divided Type
Integrated Type
Battery Powered Type
b. Dimension of Sensor
| Pipeline Diameter | Dimension |
| L | W | H |
| 15 | 160 | 95 | 130 |
| 20 | 160 | 105 | 137 |
| 25 | 160 | 115 | 150 |
| 32 | 160 | 135 | 160 |
| 40 | 200 | 145 | 175 |
| 50 | 200 | 160 | 185 |
| 65 | 200 | 180 | 205 |
| 80 | 200 | 195 | 215 |
| 100 | 250 | 215 | 235 |
| 125 | 250 | 245 | 275 |
| 150 | 300 | 280 | 300 |
| 200 | 350 | 335 | 355 |
| 250 | 400 | 400 | 405 |
| 300 | 500 | 455 | 460 |
| 350 | 500 | 515 | 520 |
| 400 | 600 | 575 | 580 |
| 450 | 600 | 635 | 630 |
| 500 | 600 | 710 | 685 |
| 600 | 600 | 835 | 795 |
| 700 | 700 | 905 | 910 |
| 800 | 800 | 1020 | 1030 |
| 900 | 900 | 1120 | 1120 |
| 1000 | 1000 | 1245 | 1250 |
| 1200 | 1200 | 1465 | 1470 |
6. Instrument Testing & Maintenance
The electromagnetic Flowmeter has the function of self-diagnosis.In
addition to power supply and hardware circuit failures, the system
also gives an alarm to other faults in general use.These messages
are prompted in the lower right corner of the screen.
1 Maintenance and repair.
A) the sensor installation site should meet the requirements of
Section 4, please keep the shell clean and tidy.
B) the transmitter should be placed in a clean, ventilated and dry
place.
C) it needs to be checked every two years, and for high-precision
users, the instrument needs to be submitted for review.
2 Transportation and storage.
A) the equipment must be packed before transportation and handled
carefully during loading and unloading.
B) the storage place must be dry and ventilated to avoid the
erosion of corrosive gases and the ambient temperature should not
be too low or too high.
C) the storage time should not exceed three years.
3. Out-of-the-box inspection.
A) the package cannot be opened with a heavy hammer, be careful not
to damage the instrument.
B) carefully check the contents according to the packing list.
