Electromagnetic flowmeter flange gasket selection guide

Case introduction

1. Selection index of electromagnetic flowmeter flange sealing gasket

The electromagnetic flowmeter flange sealing gasket is a key component that plays a sealing role. Its sealing performance is not only It is related to the measurement error and service life of the flow meter, as well as to the accurate measurement of fluid flow and environmental protection. Therefore, when selecting a gasket, you need to consider the following indicators:

1.1 Sealing performance

Sealing performance is the most basic requirement for a gasket and should be based on the work of the flow meter flange. Pressure, temperature, medium and other factors should comprehensively consider the elastic deformation, rebound degree, deformation buffering degree and other parameters of the material, and select the appropriate gasket material to ensure the sealing effect. At the same time, attention should also be paid to factors such as whether the sealing method is reasonable and the installation process is correct to avoid leakage due to improper installation.

1.2 Corrosion resistance

Electromagnetic flowmeters are often used to measure corrosive media, so the selected sealing gasket should have good corrosion resistance and be able to withstand acids, alkalis, salts, etc. Chemical attack and corrosion. Some materials with good chemical stability such as PTFE, FEP, etc. can meet this requirement.

1.3 Wear resistance

The working environment of electromagnetic flowmeters is mostly high-speed flowing media, and the sealing gasket needs to withstand the impact and wear of the media. Therefore, the wear resistance of the gasket is also a factor that needs to be considered when selecting. Some materials such as fiberglass, carbon fiber reinforced plastics, etc. have good wear resistance.

2. Commonly used gasket materials

2.1 Graphite

Graphite is an excellent sealing material with a dense structure, good mechanical properties, high temperature resistance, It is corrosion-resistant, wear-resistant, and has the advantages of good compression elasticity. In electromagnetic flowmeter flange sealing, graphite gaskets are suitable for high temperature, high pressure, corrosive media and other occasions.

2.2 PTFE

PTFE is a very common gasket material with unique physical and chemical properties, such as acid and alkali resistance, corrosion resistance, good stability, and Stickiness and other characteristics. In electromagnetic flowmeter flange sealing, PTFE gasket is suitable for low temperature, non-containing strong oxidants and corrosive media.

2.3 FEP

FEP is a polymer material with excellent corrosion resistance, wear resistance and low friction coefficient. It still has good performance under high temperature conditions. physical properties. Among electromagnetic flowmeter flange seals, FEP gaskets are suitable for high temperature, weakly corrosive media and other occasions.

2.4 Metal Gasket

Metal gasket sealing is a sealing method with simple structure and high reliability, which is widely used in various fields. Metal gaskets have stable sealing performance and are suitable for high temperature, high pressure, corrosive media and other occasions.

3. Selection of gaskets for different occasions

3.1 High temperature and high pressure occasions

In high temperature and high pressure occasions, you should choose gaskets that are resistant to high temperature, high pressure, wear resistance and Graphite gasket with good sealing performance.

3.2 Low temperature occasions

In low temperature occasions, PTFE gasket should be selected, which not only has good sealing performance, but also has good physical properties at low temperatures.

3.3 In the presence of strong oxidizing media

In the presence of strong oxidizing media, sealing materials with strong corrosion resistance such as metal gaskets should be used.

3.4 General media situations

In general media situations, the corresponding gasket material can be selected according to pressure and other parameters. Graphite, PTFE, FEP, metal gaskets, etc. can all be considered.

The electromagnetic flowmeter flange sealing gasket is an important component that affects the service life and accuracy of the electromagnetic flowmeter. Choosing a suitable gasket material must not only consider the properties of the medium and working conditions, as well as factors such as the performance and durability of the gasket. Through the introduction of this article, we hope to provide users with some help in selecting appropriate sealing materials and improving the efficiency and accuracy of electromagnetic flowmeters.