Intelligent electromagnetic flowmeter is based on the norms of the manufacturing system and the development of its advanced design concept to ensure that the product of high precision and high reliability, compared with the old electromagnetic flowmeter, which has high measurement accuracy, reliability, stability Good, functional, long life and other advantages.
As a commonly used flow measurement instrument, the choice of flowmeter material is also an important factor. In the electromagnetic flowmeter, only part of the electrode and the measuring tube are in contact with the medium. Therefore, according to the characteristics of different media, the appropriate electrode and lining material are selected.
First, the electrode selection
Usually the electrode is divided into the following materials: 1. Stainless steel (0Cr18Ni12Mo2Ti). Applicable to nitric acid, less than 5% at room temperature sulfuric acid, phosphoric acid, alkaline solution. 2. Hastelloy. Can be used for seawater, brine. 3. Titanium Applicable to seawater, various chlorides and hypochlorous hydrochloric acid, oxidizing acid (including fuming nitric acid), organic acids, alkali and so on. Tantalum In addition to hydrofluoric acid, fuming sulfuric acid, alkali other chemical media, including boiling point of hydrochloric acid, nitric acid and <175 ℃ sulfuric acid can be used. 5. Platinum Can be used for a variety of acid, alkali, salt, but does not contain aqua regia.
Second, the choice of lining material
How to choose the right lining material. It must be noted that the lining material should be selected based on the corrosiveness, abrasion and temperature of the measured medium. Rubber Has a very good flexibility, a high degree of tearing, wear resistance is good, resistance to the weak acid weak alkali corrosion, to measure water, sewage, mud and pulp and so on. 2. Polyurethane. Has excellent wear resistance, acid, alkali performance is poor, can measure the strong wear and tear of the coal slurry, mud and pulp. 3. Polytetrafluoroethylene. Resistant to hydrochloric acid, sulfuric acid, nitric acid, concentrated alkali and a variety of organic solvents, wear resistance is good, poor bonding performance.
The above is the choice of electromagnetic flowmeter material, different media have different characteristics, do not have to pick the most expensive, select the appropriate real economic use.