Mag Flow Measurement Industrial Flow Meter with Big Pipe Size
1. Introduction
MLF electromagnetic flow meter, composed of sensor and converter,
works based on Faraday’s law of electromagnetic induction law. It
is used to measure electrical conductivity of liquid or solid.
Generally, the electrical conductivity should be over
5υS/cm(electrical conductivity of tap water, raw water is about
100～500υS/cm),It can also be used to measure various media like
acid, alkali, saline solution, paper pulp or pulp and so on. But
these media can’t contain a lot of magnetic materials and bubbles.
MLF electromagnetic flow meter is a kind of instrument which is
used for measuring the flow conductivity liquid. The meter is
widely used in flow measuring of Metallurgy, Chemical Industry,
Paper Industry,Environmental Protection, Oil Industry, Textile
Industry, Food Industry and City Administration, Water Works,etc.
2. Features
MLF electromagnetic Flowmeter is explosion-proof design.
function of low conductivity measurement.
There are 9 language options to meet the needs of different
customers.
Have self-regulation function and self-examination.
Different outputs are optional: hart, RS485 Profibus ,4-20 mA,
frequency, pulse.
3. Specification
| MLF Type | Divided Type | Integrated Type | Explosive Proof Integrated Type | Battery Powered Type | Heat Energy Type |
| Accuracy | ±0.2% or ±0.5% |
| Pipeline Diameter | DN10-DN2000 | DN10-DN600 | DN25-DN2000 |
| Flange | GB, ANSI, JIS, BS, Others |
| Pressure | DN10-DN600 1.0 1.6 2.5 4.0MPa |
| DN700-DN2000 0.6 1.0 1.6MPa |
| Liner Material | CR, PTFE, PU, Hard Rubber, PFA, FEP(F46) |
| Conductivity | ≥5µs/cm(Please contact us if it is less than 5µs/cm) |
| Electrode | 316L SS, Hb, Ta, Ti, Hc, Tungsten Carbide, Others |
| Protection Class | IP65, IP66, IP67, IP68 |
| Medium Temperature | -25~180℃
(Please refer to liner material) | -25~80℃(Please refer to liner material) | -25~180℃
(Please refer to liner material) |
| Ambient Temperature for Accuracy Influence | <±0.1%/10℃ or <±0.25%/10℃ at the ambient temperature of -25~60℃ |
| Repetability | ≤±0.1% or ±0.25% |
| Analog Output Error | ≤±0.02mA |
| Velocity | 0.3~10m/s |
| Electrical connection | M20x1.5 Seal Cartridge, GB1/2, NPT1/2 |
| Output | 4-20mA, Pulse, RS485, Hart, Profibus |
4. Selection of Liner Material
| Liner Material | Main Performance | Application |
| PTFE | 1. Have the most stable chemical properties in plastic and
resistance to boiling hydrochlor and sulfuric acid, nitric acid
aqua regia, strong alkali, and all kinds of organic solvents, but
can not resist the corrosion of chlorine trifluoride, high
temperature nitrogen trifluoride, liquid fluorine, liquid oxygen
and ozone. 2. Low abrasion 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. Good resistance to room temperature, hydrochloric acid, acetic
acid, oxalic acid, ammonia, phosphoric acid and 50% sulfuric acid,
sodium hydroxide, potassium hydroxide 2. Avoid strong oxidants | 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 |
5. 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 the all the concentration of hydrochloric acid
below the boiling point, also resistance tothe corrosion of
non-oxidizing acid, alkali, salt like sulfuric acid phosphoric acid
hydrofluoric acid, organic acids. |
| Hc | Resistance to the corrosion of oxidizing acids like metric acid,
mixed acid. The mixture of chromium acid and sulfuric acid, and
salts of oxidative, like Fe3+, Q3+, and some other oxidants, like
hypochlorite salt solution higher than normal tmperature and
seawater. |
| Ti | Resistance the corrosion of seawater, various chlorides,
hypochlorite, oxidizing acid(including fuming nitric acid), and
organic acid or alkali, but don't be resistance to the corrosion of
pure reducint acid(like sulfuric acid, hydrochloric acid). But if
acid includes oxidants(like 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. |
