PFA Liner Metallurgy DN2000 0.6MPa Magnetic Flow Meter
Model Number:MLF
Minimum Order Quantity:1pc
Delivery Time:7-10 working days
Payment Terms:T/T
Place of Origin:China
Price:Negotiation
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Shanghai Shanghai China
Address:
No.21, Lane 697, Guangfulin Road, Songjiang District, Shanghai, China
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Product Details
Magnetic Flow Meter in China with 3'' Flow Meter Price
1. Introduction
The MLF electromagnetic flowmeter works according to Faraday's law of electromagnetic induction and consists of a sensor and a converter. Used to measure the conductivity of liquids or solids. Under normal circumstances, its conductivity should be greater than 5μS/cm (the conductivity of tap water and raw water is about 100-500μS/cm), and it can also be used to measure acids, alkali, brine, pulp or pulp and other media. But these media cannot contain a lot of magnetic substances and bubbles.
MLF electromagnetic flowmeter is an instrument for measuring liquid fluidity. It is widely used in flow measurement in metallurgy, chemical industry, paper making, environmental protection, petroleum, textile, food, urban management, water plant and other industries.
2.Working Principle
The principle of the sensor is based on Faraday’s law of electromagnetic induction.
It is installed a pair of detection electrodes on the pipe wall,where the measurement pipe axis and magnetic field lines are vertical. When the conductive liquid cuts magnetic field lines and produces induced electromagnetic force.Which can be measured by the two electrodes on the
meter pipe.The result can be calculated by formula: Induced electromotive force,(flow signal) E=KBDV
E——Induced electromotive force,V；
K——meter constant；
B——Magnetic flux density,T；
D——Internal diameter of measuring pipe,m；
V——Average velocity of pipe section,m/s.
MLF Series Electromagnetic Flow Meter
Assume the volume of liquid as qv(m3/s),qv=πD2V/4),so in the formula E=(4kB/πD)qv=kqv,
K is meter constant,K=4kB/πD.
Actually, the electromagnetic flow meter consists of two parts, transmitter and sensor, the measuring electrodes inspect the electromotive force, and transmit to the converter, the converter provides excitation current.
E is usually called a flow signal, after processing the flow signal by converter, output 4~20 mA/pulse(or frequency) signal which is proportional to the flow rate, then the flow rate recording,adjusting can be achieved.
3. Selection of Liner Material
| Liner Material | Main Performance | Application |
| PTFE | 1 It has the most stable chemical properties in plastics, resistant to boiling hydrogen chloride and sulfuric acid, nitric acid, aqua regia, strong alkali and various organic solvents, but not resistant to chlorine trifluoride, high temperature nitrogen trifluoride, liquid fluorine, and liquid oxygen And ozone corrosion. 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 resistance, 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 |
4. Selection of Electrode Materials
| Electrode Material | Main Performance |
| 316L | Good nitric acid corrosion resistance, <5% sulfuric acid, acetic acid, alkaline liquid, sulfite under certain pressure, sea water, acetic acid, etc. corrosion at room temperature, can be widely used in petrochemical urea, vinylon, etc. |
| Hb | Good resistance to all hydrochloric acid with a concentration lower than the boiling point, and also resistant to corrosion by non-oxidizing acids, alkalis, sulfuric acid, phosphoric acid, hydrofluoric acid, and organic acids. |
| Hc | Corrosion resistance to oxidizing acids, such as nitric acid, mixed acids. A mixture of chromic acid and sulfuric acid, oxidizing salts such as Fe3+, Q3+, and some other oxidizing agents, such as a mixture of hypochlorite solution and seawater at higher than normal temperature. |
| Ti | It is resistant to corrosion by sea water, various chlorides, hypochlorites, oxidizing acids (including fuming nitric acid), organic acids or alkalis, but not resistant to corrosion by pure reducing acids (such as sulfuric acid and hydrochloric acid). However, if the acid contains oxidants (such as nitric acid, Fe3+, Q3+), the corrosion resistance will be reduced. |
| 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. Instrument Testing & Maintenance
The electromagnetic flowmeter has a self-diagnostic function. In addition to power supply and hardware circuit failures, the system also alarms other failures in general use. These messages will give corresponding prompts 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 housing tidy;
b) The transmitter should be placed in a clean, ventilated and dry place;
c) It needs to be inspected every two years. For high-precision users, the instrument needs to be submitted for review.
2 Transportation and storage
a) The instrument must be packaged before transportation, and be handled with care when loading and unloading.
b) The storage place must be dry and ventilated to avoid corrosive gases, and the ambient temperature should not be too low or too high;
c) The storage time should not exceed three years.
3. Unpacking inspection
a) The package cannot be opened with a heavy hammer, be careful not to damage the instrument
b) Check the contents carefully according to the packing list.
6. Product Photos
PFA Liner Metallurgy DN2000 0.6MPa Magnetic Flow Meter
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