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How to choose the material of electromagnetic flowmeter?
Tianjin Xuner Instrument answers for you: As a commonly used flow measurement instrument, the selection of material for electromagnetic flowmeter is also an important factor. Due to the fact that only the electrode and the interior of the measuring tube are in contact with the medium in the electromagnetic flowmeter, it is necessary to select the correct electrode and lining material according to the characteristics of different media.
1. Selection of electrode materials 1 Stainless steel (0Cr18Ni12Mo2Ti). Suitable for nitric acid, sulfuric acid with less than 5% at room temperature, boiling phosphoric acid, formic acid, alkaline solutions, sulfite under certain pressure, seawater, acetic acid. 2. Hastelloy B and Hastelloy C. Can be used for seawater and saltwater. 3. Titanium. Suitable for seawater, various chlorides and hypochlorous hydrochloric acid, oxidizing acids (including fuming nitric acid), organic acids, bases, etc. 4. Tantalum. Other chemical media, including boiling point hydrochloric acid, nitric acid, and sulfuric acid below 175 ℃, can be used except for hydrofluoric acid, fuming sulfuric acid, and alkali. 5. Platinum. Can be used for various acids, bases, and salts, but does not include aqua regia.
2. Selection of lining material 1 Rubber. It has excellent elasticity, high tensile strength, good wear resistance, and resistance to general weak acids and alkalis. It can be used to measure water, sewage, mud, and slurry. 2. Polyamide. Coal slurry, mud and slurry with excellent wear resistance, poor acid and alkali resistance, and the ability to measure neutral and strong wear. 3. Polytetrafluoroethylene. Boiling resistant hydr
2. What is the national standard for electromagnetic flowmeters and which standard are they manufactured according to?
The national standard for electromagnetic flow meters, based on the national industry standard GB4208-76 and the National Electrotechnical Commission standard IEC529-76, specifies the protection level requirements for electrical and electrical product casings. There are several levels of imitation car signal:
1. IP65: For the anti spray type, the electromagnetic flow meter sensor casing allows the water tap to spray water from all directions of the electromagnetic flow meter sensor, with a working pressure of 30Kpa, a water flow rate of 12.5L/s, and a spacing of 3 meters. Secondly, IP67: Electromagnetic flowmeter sensors can be used for short-term immersion in water.
III. IP68: For deep diving type - suitable for long-term work in water or underground under certain working pressure. At this time, the sensor and display information of the electromagnetic flowmeter are partially separated, and a separate electromagnetic flowmeter should be made, but the protection level of the electromagnetic flowmeter must be paid attention to according to the sail damage regulations.
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