Explosion proof DN80 electromagnetic flowmeter

Description :

　　Explosion proof DN80 electromagnetic flowmeter

　　This product is mainly used to measure the volumetric flow rate of conductive liquids and slurries in closed pipelines. Including highly corrosive liquids such as acids, alkalis, salts, etc.

　　1、 Product features:

　　1. Suitable for volumetric flow measurement of conductive fluids with conductivity greater than 5 ц s/cm;

　　2. There are no active or obstructed components inside the measuring tube, and the pressure loss is small;

　　3. Lining and electrodes with different materials have good anti-corrosion performance;

　　4. Not affected by medium, density, viscosity, temperature, pressure, and conductivity;

　　5. Low frequency rectangular wave excitation, less susceptible to interference, stable and reliable;

　　6. The converter has low energy consumption, simple and convenient installation, and users do not need to debug.

　　2、 Technical parameters:

　　Instrument accuracy: pipeline type 0.5 level, 1.0 level; Insertion type 2.5 level

　　Measurement medium: various liquid and liquid-solid two-phase fluids with conductivity greater than 5 μ S/cm.

　　Flow velocity range: 0.2-8m/s

　　Work pressure: 1.6MPa

　　Environmental temperature: -40 ℃ to+50 ℃

　　Quality temperature: PTFE lining ≤ 180 ℃

　　Rubber material lining ≤ 65 ℃

　　Explosion proof mark: Exmibd Ⅱ BT4

　　Explosion proof certificate number: GYB01349

　　External magnetic interference: ≤ 400A/m

　　Shell protection: Integrated type: IP65

　　Explosion proof DN80 electromagnetic flowmeter

　　3、 Application industry:

　　Suitable for measuring the volumetric flow rate of conductive liquids and slurries in closed pipelines, such as clean water, sewage, various acid-base salt solutions, mud, slurry, pulp, and liquids related to food. Widely used in industries such as metallurgy, papermaking, water treatment, chemical engineering, light industry, textiles, electricity, and mining.

　　4、 Structure:

　　Magnetic circuit system: Its function is to generate a uniform DC or AC magnetic field. The DC magnetic circuit is implemented using magnets, which has the advantages of a relatively simple structure and less interference from AC magnetic fields. However, it is prone to polarize the electrolyte liquid inside the measuring tube, causing the positive electrode to be surrounded by negative ions and the negative electrode to be surrounded by positive ions, resulting in electrode polarization and an increase in the internal resistance of the two electrodes, which seriously affects the normal operation of the instrument. When the diameter of the pipeline is large, the magnet is also large, bulky, and uneconomical. Therefore, electromagnetic flow meters generally use alternating magnetic fields and are excited by a 50HZ power supply.

　　Measurement catheter: Its function is to allow the measured conductive liquid to pass through. In order to divert or short-circuit the magnetic flux when the magnetic field lines pass through the measuring conduit, the measuring conduit must be made of non-magnetic, low conductivity, low thermal conductivity, and materials with certain mechanical strength, such as non-magnetic stainless steel, fiberglass, high-strength plastic, aluminum, etc.

　　Electrode: Its function is to generate an induced potential signal proportional to the measured value. The electrode is generally made of non-magnetic stainless steel and is required to be flush with the lining so that fluid can pass through without obstruction. Its installation position should be in the vertical direction of the pipeline to prevent sediment from accumulating on it and affecting measurement accuracy.

　　Shell: Made of ferromagnetic material, it is the outer shell of the distribution system excitation coil and isolates the interference of external magnetic fields.

　　Lining: There is a complete layer of electrical insulation lining on the inner side of the measuring conduit and the flange sealing surface. It directly contacts the liquid being measured, and its function is to increase the corrosion resistance of the measuring conduit and prevent the induced potential from being short circuited by the metal measuring conduit wall. The lining materials are mostly corrosion-resistant, high-temperature resistant, wear-resistant polytetrafluoroethylene plastics, ceramics, etc.

　　Converter: The induced potential signal generated by liquid flow is very weak and greatly affected by various interference factors. The function of the converter is to amplify and convert the induced potential signal into a unified standard signal and suppress the main interference signal. Its task is to amplify and convert the induced potential signal Ex detected by the electrode into a unified standard DC signal.

AfterSalesService :

• DN80 electromagnetic flowmeter