How to Choose the Seal of Electromagnetic Flow Meter

I. Introduction

Electromagnetic flow meter, as an important tool in the field of modern flow measurement, is widely used in the chemical industry, environmental protection, metallurgy, paper and other industries, and its accuracy and reliability are directly related to the efficiency and safety of the production process. In the design and production process of electromagnetic flow meter, the choice of sealing is especially critical. It not only affects the measurement accuracy and service life of the flow meter, but also involves important issues such as production safety and environmental protection. In this paper, we will start from the perspective of professional manufacturers, in-depth discussion of electromagnetic flow meter sealing selection principles and methods, in order to provide reference and reference for the industry.

Electromagnetic Flow Meter

Ⅱ. The Importance of Electromagnetic Flow Meter Sealing

Electromagnetic flow meter sealing performance refers to its ability to prevent leakage of media. In practice, the electromagnetic flow meter in contact with the medium is often corrosive, high temperature, high pressure and other characteristics, therefore, the sealing performance is directly related to the safe operation of the flow meter and service life. At the same time, good sealing performance can also effectively prevent the media leakage of pollution and harm to the environment. Therefore, in the selection of electromagnetic flow meter seal, must fully consider the nature of the medium, the working environment and the structural characteristics of the flow meter and other factors.

Ⅲ. The Electromagnetic Flow Meter Seal Selection Principles

  1. Sealing Performance

Sealing performance is the primary consideration in the selection of electromagnetic flow meter seal. In the selection of sealing materials, should be based on the nature of the medium, working pressure, temperature and other factors to consider the elastic deformation of the material, the degree of resilience, the degree of deformation cushioning and other parameters to ensure that the sealing effect. At the same time, ensure that the gasket is fixed in a reasonable way, check if the installation process is correct, and consider other factors to avoid leakage due to improper installation.

  1. Corrosion Resistance

Electromagnetic flow meter is commonly used in corrosive media measurement, so the selected gasket should have good corrosion resistance, can resist acid, alkali, salt and other chemical substances erosion and corrosion. In the selection of sealing materials, should be fully aware of the chemical nature of the medium, choose to match the corrosion-resistant materials.

  1. Wear Resistance

Electromagnetic flow meter working environment for high-speed flow of media, the gasket needs to withstand the impact of the media and wear. Therefore, the wear resistance of the gasket is also a factor to be considered when selecting. Some materials such as glass fiber, carbon fiber reinforced plastic have good wear resistance.

  1. Economy

While meeting the above requirements, we should also consider the economy of sealing materials. According to the actual demand and budget, choose cost-effective sealing materials.

Digital electromagnetic water flow meter

Ⅳ. Electromagnetic Flow Meter Seal Selection Method

  1. Understand the Nature of the Medium

In the selection of electromagnetic flow meter seal, we must first understand the nature of the medium, including the chemical composition of the medium, corrosivity, temperature, pressure and other parameters. These parameters will directly affect the selection and use of sealing materials.

  1. Determine the Seal Form

According to the structure of the electromagnetic flow meter features and the nature of the medium, to determine the appropriate sealing form. Common sealing forms include flange sealing, thread sealing, welding sealing and so on. In the choice of sealing form, should give full consideration to the convenience of installation, disassembly and maintenance.

  1. Selection of Sealing Materials

According to the nature of the medium and the requirements of the sealing form, select the appropriate sealing material. Common sealing materials include graphite, PTFE, FEP, metal gaskets and so on. In the selection of sealing materials, should consider its sealing performance, corrosion resistance, abrasion resistance and economy and other factors.

  1. Evaluation of Sealing Effect

After selecting the sealing material, evaluate the sealing effect. Through experiments or simulation tests and other methods, to verify that the selected sealing materials in the actual working environment of the sealing performance to meet the requirements.

Ⅴ. Case Study

The following are two typical cases on the electromagnetic flow meter seal selection, aims to deepen the understanding of the seal selection principles and methods through actual cases.

Case 1: a chemical plant in the selection of electromagnetic flow meter seal, due to insufficient consideration of the corrosiveness of the medium, resulting in the selection of sealing materials in a short period of time leakage. After the technicians on-site investigation and analysis, found that the medium for the strong corrosive acid, the original sealing material can not withstand its corrosive effect. Finally, the chemical plant replaced the sealing material with stronger corrosion resistance, successfully solved the leakage problem.

Case 2: a company in the purchase of electromagnetic flow meter, due to not clearly informed that the medium contains a mixture of acid and alkali sewage, resulting in the selection of sealing materials can not be adapted to its working environment. In the process of use, a flow meter leakage phenomenon. After the technicians on-site investigation and analysis, found that the medium of the sealing material has a strong corrosive. Eventually, the company replaced the sealing material with stronger corrosion and wear resistance, and reconfigured the electrode and liner and other key components to successfully solve the problem.

Ⅵ. Conclusion

Electromagnetic flow meter seal selection is a complex and important work. In the selection process, it is necessary to fully consider the nature of the medium, the working environment and the structural characteristics of the flow meter and other factors, select the appropriate sealing form and material. At the same time, it should also be through experiments or simulation tests and other methods to assess whether the sealing effect of the selected sealing materials to meet the requirements. Only in this way can ensure the safe operation and service life of the electromagnetic flow meter, to provide a strong guarantee for the smooth running of the production process.

The content of this article is for reference only, the specific selection needs to be based on the actual situation for comprehensive consideration. At the same time, it is recommended that users in the purchase of electromagnetic flow meter choose manufacturers or suppliers with rich experience and expertise to ensure product quality and reliability of technical support.

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