Classification of rubber seals

Rubber seals are an elastic element widely used in various industrial fields to prevent the leakage of liquids and gases. According to different classification standards, there are many types of rubber seals. This article will introduce the classification of rubber seals in detail, so that readers can better understand their materials and applications.

First. Classification by material

1. Natural rubber (NR) : Natural rubber is an elastic material extracted from rubber trees and has good elasticity and cold resistance. It can still maintain good softness at lower temperatures, and is suitable for the sealing of general media and gases.

2. Nitrile butadiene rubber (NBR) : Nitrile butadiene rubber is a synthetic rubber with good oil resistance, chemical corrosion resistance and aging resistance. It is widely used to seal oil media in the petroleum, chemical and automotive industries.

3 Fluorine rubber (FKM) : fluorine rubber has excellent high temperature resistance, corrosion resistance and oil resistance, can maintain good sealing performance in high temperature and strong corrosion environment. It is suitable for sealing high temperature, highly corrosive gases and liquids.

4. Silicone: Silicone rubber has excellent high temperature resistance, oxidation resistance and weather resistance, and can maintain stable sealing performance in high and low temperature environments. It is suitable for sealing high temperature, high vacuum and radioactive gases.

Second, according to the cross-section shape classification

1. O-ring: O-ring is the most common rubber seal shape, and its cross-section shape is circular. It has good elasticity and sealing performance, suitable for a variety of static and dynamic sealing occasions.

2. Y-ring: Y-ring is a rubber seal with a supporting edge, and its cross section shape is similar to the English letter Y. It is mainly used to seal the piston rod, gas cylinder and other occasions, can prevent the medium along the direction of the piston rod leakage.

3. Lip ring: Lip ring is a rubber sealing ring with lip shape, and its cross section shape is similar to the lip. It is mainly used to seal the connection parts such as flanges and caps, which can prevent the leakage of media from the connection.

4. Combined sealing ring: The combined sealing ring is composed of two or more rubber sealing rings, which can improve the sealing performance and adaptability through combined use. It is suitable for some special occasions, such as high pressure, high speed or high precision sealing.

Third, according to the use of classification

1. Static seal: static seal refers to the occasion where the seal plays a sealing role in the static state. For example, pipe joints, pressure vessels, etc. Rubber seals used for static sealing usually have good elasticity and pressure resistance.

2. Dynamic seal: Dynamic seal refers to the occasion when the seal plays a sealing role in the state of motion. For example, piston rod, gas cylinder, etc. Rubber seals for dynamic sealing need to have good wear resistance and followability to adapt to pressure and temperature changes under the state of motion.

Fourth. Summary

The classification of rubber seals is varied and can be divided into different types according to different classification standards. Understanding the different types of rubber seals and their materials and application characteristics helps to better select and use seals suitable for specific occasions and improve the reliability and safety of equipment. With the development of industrial technology, the application field of rubber seals continues to expand, and more new rubber materials and cross-section shapes will appear in the future to meet the needs of various complex working conditions.

If you have other questions, please visit the Forever Seals official website for consultation


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