Industry new

How to correctly select the electromagnetic flowmeter material introduction

How to correctly choose the electromagnetic flowmeter material, electromagnetic flowmeter as a commonly used flow measurement instrument, the choice of its material is a very important factor. Because the electromagnetic flowmeter has only the inside of the electrode and the measuring tube in contact with the medium, it is necessary to select the material of the correct electrode and the lining according to the characteristics of different media.
First, the choice of electrode materials General electrode materials are divided into the following:
1, stainless steel (0Cr18Ni12Mo2Ti). Suitable for nitric acid, less than 5% sulfuric acid at room temperature, boiling phosphoric acid, formic acid, alkali solution, sulfuric acid, seawater, acetic acid at a certain pressure.
2. Hastelloy B and Hastelloy C. Can be used in sea water, salt water.
3. Titanium. Suitable for seawater, various compounds and secondary hydrochloric acid, oxidizing acids (including fuming nitric acid), organic acids, alkalis, etc.
4, hehe. The remaining chemical media other than fuming sulfuric acid and alkali, including boiling point hydrochloric acid, nitric acid and <175 °C sulfuric acid can be used.
5, platinum. Can be used in a variety of acids, bases, salts, but does not include aqua regia.
Second, the choice of lining material Another important material choice for electromagnetic flowmeter is: how to accurately select the lining material. It must be noted that the lining material should be selected based on the aggressiveness, wear and temperature of the medium being tested.
1. Rubber. It has excellent elasticity, high tearing force, good wear resistance, resistance to general weak acid and weak alkali corrosion, and can measure water, sewage, mud and pulp.
2. Polyurethane. It has excellent wear resistance, acid and alkali resistance, and can measure medium-strong and strong wear of coal slurry, mud and slurry.
3. Polytetrafluoroethylene. Boiling hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali and various organic solvents, good wear resistance and poor bonding performance.
The above is the choice of the material of the electromagnetic flowmeter. Different media have different characteristics, and it is not necessary to choose expensive. It is economical and durable to choose the right one.

PREVIOUS：How to solve the description of bubble noise NEXT：Plug-in electromagnetic flowmeter electromagn