As in the electromagnetic flowmeter, only the electrode and conduit of the internal contact with the medium, and therefore should be based on the different nature of the medium, reasonable selection of electrode materials and lining, electromagnetic flowmeter selection in addition to flange caliber size selection, there is based on different media selection of different electrodes and lining, due to different media, corrosive, oxidizing, different electrodes caused by the degree of influence of the different. Therefore, the selection of the corresponding electrode and lining is to ensure the normal operation of the electromagnetic flowmeter and even extend the service life of the key. Let's look at the following, electromagnetic flowmeter different electrodes and fabrics are suitable for the measurement of those media.
Electromagnetic flowmeter should be based on the measured medium reasonable selection of electrodes:
- 1、Stainless steel (0Cr18Ni12Mo2Ti): Nitric acid, sulfuric acid <5% at room temperature, cheery phosphoric acid, anthracite, alkaline solution, sulfurous acid under certain pressure, seawater, acetic acid.
- 2、Hastelloy C: Hastelloy B (HC, HB) seawater, salt water.
- 3、Tantalum (Ta): Chemical media other than hydrofluoric acid, fuming sulfuric acid and alkali, including hydrochloric acid, nitric acid and sulfuric acid <175°C at boiling point.
- 4、Titanium (Ti): seawater, various chlorinated and subchlorinated hydrochloric acids, oxidizing acids (including fuming nitric acid), organic acids, bases.
- 5、Platinum (Pt): a variety of acids, alkalis, salts, excluding aqua regia electromagnetic flowmeter should be based on the measured medium corrosive, abrasive and temperature to select the lining material.
Natural rubber (soft rubber)
- 1、Better elasticity, abrasion resistance and tearing force.
- 2、Resistant to general weak acid, weak alkali corrosion measurement of water, sewage acid-resistant rubber (hard rubber) can be resistant to hydrochloric acid, acetic acid, oxalic acid, ammonia, phosphoric acid and 50% of the sulfuric acid, sodium hydroxide, potassium hydroxide corrosion, but does not resist the corrosion of strong oxidizing agents to measure the general corrosion of acid, alkali and salt solutions neoprene 1, excellent elasticity, a high degree of tensile strength, wear-resistant 2, resistant to the general low concentration of acid, alkali and salt solutions. The corrosion of acid, alkali and salt solutions, but not resistant to oxidizing media; measurement of water, sewage, mud and slurry polyurethane rubber 1, excellent abrasion resistance 2, acid and alkali resistance function is poor measurement of neutral strong abrasion of coal slurry, mud and slurry polytetrafluoroethylene (PTFE) 1, resistant to cheering hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali and a variety of organic solvents 2, abrasion resistance function is good, poor bonding function measurement of the concentration of concentrated alkali and corrosive solutions and sanitary media. Solution and sanitary media.
