Rubber gasket is a rubber product mainly used for sealing and buffering between two stationary surfaces of metal flanges or other connecting parts.It can be round, square or other non-standard shapes with angles or grooves.It has properties such as oil resistance, acid and alkali resistance, cold and heat resistance, and aging resistance, and can be directly cut into various shapes of sealing gaskets The manufacturing methods of rubber gaskets include compression molding and vulcanization film punching. The compression molding method is formed by heating and pressing rubber material into a mold, while the vulcanization film punching is the process of cutting the vulcanized rubber sheet into the required shape and size.

The main shape of rubber gasket is rubber flat gasket, with the specific shape being as below:

OD generally represents the outer diameter of the gasket

ID represents the inner diameter of the gasket

W represents the width of the gasket

H represents the thickness of the gasket.

In terms of material, The main products of rubber gaskets include silicone rubber gaskets, nitrile rubber gaskets, FKM or Viton rubber gaskets, EPDM rubber gaskets, and other rubber gaskets. Rubber gaskets have properties such as oil resistance, acid and alkali resistance, cold and heat resistance, and aging resistance. They can be directly cut into various shapes of sealing gaskets. Rubber gaskets are widely used in industries such as automotive, electronics, chemical, anti-static, flame retardant, food, and various mechanical equipment, and can play a role in cushioning, sealing, and buffering.

Rubber gasket production method:

Rubber gaskets can be made by compression molding or cutting. Cmpression Molding is done using hydraulic forming machines and molds, while cutting is done using gasket cutting machines. Compared to molding, molding saves material, but it is relatively simple. Only one type of gasket can be made from a set of molds, and gasket cutting machines can cut any size within 1500mm. However, the utilization rate of the sheet metal is not very high. When considering which method to use, factors such as elasticity, resilience, flexibility, non polluting process media, low-temperature non hardening, and processability should be taken into account ‌

As a professional manufacturer of rubber molded products, Lixu Rubber generally adopts rubber mold technology to efficiently produce rubber gaskets of various materials, sizes, and parameter requirements to meet the diversified needs of customers for rubber gaskets !

Material characteristics of rubber gasket:

The material of rubber gasket is mainly made of rubber, which is same as the material of O-ring. It usually includes nitrile rubber, fluororubber, chloroprene rubber, EPDM rubber, silicone rubber, natural rubber, polyurethane, PTFE, etc. Different rubber materials have different performance characteristics, and suitable materials can be selected according to specific usage environments. The main materials and characteristics of rubber gaskets are as follows:

Silicon rubber

It has outstanding high and low temperature resistance, maintains good elasticity in the temperature range of -70 ℃ to+260 ℃, is resistant to ozone and weather aging, and is suitable as a sealing gasket in thermal machinery. Non toxic can be used to produce insulation, insulating products, and medical rubber products. Simultaneously possessing excellent properties such as waterproofing, flame retardancy, high temperature resistance, conductivity, wear resistance, and oil resistance, it is widely used in various industries such as machinery, electronics, and plumbing.

Nitrile rubber

NBR (Nitrle Butadiene Rubber) is a polymer formed by copolymerization of butadiene and acrylonitrile through lotion. It is famous for its excellent oil resistance, good wear resistance, aging resistance and air tightness. Therefore, it is widely used in the rubber industry.

Viton or FKM rubber

It has high temperature resistance and can be used in environments ranging from -20 ℃ to+200 ℃. It is resistant to strong oxidants, oil, and acid and alkali. Usually used in high temperature, high vacuum, and high pressure environments, it is also suitable for oil environments and widely used in industries such as petroleum, chemical, aviation, and aerospace.

Others

Chloroprene rubber, natural rubber, EPDM rubber, acrylic rubber, and other special rubbers. Has characteristics such as oil, acid, alkali resistance, wear resistance, high and low temperature resistance.

Rubber gaskets, as sealing materials, have diverse specifications and a wide range of application scenarios. The following are the specifications and applicable scenarios of common rubber gaskets:

Firstly, NBR nitrile rubber gaskets with inner diameter of 3mm-200mm, outer diameter of 6mm-300mm, and thickness of 1mm-20mm are particularly suitable for sealing media such as petroleum, liquefied gas, and grease.

Secondly, EPDM ethylene propylene rubber gaskets with specifications of inner diameter 3mm-300mm, outer diameter 6mm-500mm, and thickness 1mm-30mm are commonly used for sealing systems such as air conditioning, refrigeration, and heating.

Furthermore, CR chloroprene rubber gaskets with an inner diameter of 3mm-200mm, an outer diameter of 6mm-300mm, and a thickness of 1mm-20mm are suitable for sealing automobiles, motorcycles, and mechanical electrical equipment.

In addition, FKM fluororubber gaskets with an inner diameter of 3mm-150mm, an outer diameter of 6mm-200mm, and a thickness of 1mm-10mm are widely used in industries such as chemical, petroleum, and pharmaceutical due to their high temperature and chemical resistance.

Finally, the silicone rubber gasket has an inner diameter of 3mm-300mm, an outer diameter of 6mm-500mm, and a thickness of 1mm-30mm, making it particularly suitable for high temperature and high cleanliness environments such as medical devices, food equipment, and electronic products.

When selecting gaskets,It is necessary to comprehensively consider factors such as medium properties, temperature, pressure, etc., and ensure accurate dimensions and tight fit during installation to achieve the best sealing effect. Understanding these specifications and applications will help you select rubber gaskets more accurately

Main parameters of rubber gasket

Product Name                       Temperature                 Pressure                         Common Specifications

Nitrile rubber gasket               -20 ℃~110 ℃             PN<=16MPa                  DN15~DN400

Fluororubber gasket               -20 ℃~200 ℃              PN<=16MPa                  DN15~DN400

Natural rubber gasket            -50 ℃~80 ℃                PN<=16MPa                  DN15~DN400

Neoprene gasket                    -20 ℃~100 ℃              PN<=16MPa                  DN15~DN400

EPDM rubber gasket               -57 ℃~176℃              pressure<2.5MPa           DN15~DN400

Silicone rubber gasket            -100 ℃~300 ℃            pressure<3.0MPa           DN15~DN400

The main functions of rubber gaskets include:

Sealing function: It plays a sealing role in mechanical equipment to prevent liquid or gas leakage.

Buffer function: reduce vibration and impact, protect equipment components.

Environmental resistance: Its characteristics such as oil resistance, acid and alkali resistance, cold and heat resistance, and aging resistance make it suitable for various harsh environments.

Through these characteristics and advantages, rubber gaskets play an important role in various industrial fields, including industrial applications, construction, daily life, transportation, and medical health.

Industrial applications

In industrial production, rubber gaskets are widely used for sealing and shock absorption in mechanical equipment and systems. For example, in the automotive manufacturing industry, rubber gaskets are used in shock absorbers, brake systems, and suspension systems to reduce noise and improve equipment performance; In the petrochemical industry, rubber gaskets are used to seal pipelines and valves, preventing liquid leakage and environmental pollution; In electronic device manufacturing, rubber gaskets are used for electromagnetic interference protection and protection of sensitive components.

Construction field

In the field of construction, rubber gaskets are also widely used. For example, rubber flooring is commonly used for ground paving in schools, kindergartens, gyms, and community activity areas, providing a safe and comfortable sports environment. Rubber pads can also be used for shock absorption and sound insulation in building structures, such as rubber buffer blocks in bridge bearings, which can effectively absorb seismic energy and improve the stability and safety of the structure.

Daily life

In daily life, rubber gaskets also have various applications. For example, anti slip foot mats, waterproof mats, table corner protective mats, etc. are common rubber products. These small objects, although inconspicuous, have improved our quality of life in details, enhancing the comfort and safety of our living environment.

Transportation

Rubber gaskets are also widely used in transportation, especially in automobile manufacturing. High quality tires not only provide better grip and handling, but also significantly improve driving safety. In addition, rubber gaskets are also used for shock absorption and sound insulation of car chassis, reducing vibration and noise, and enhancing driving experience.

Healthcare

Rubber gaskets also play an important role in medical equipment. For example, the silicone pads used on the operating table have excellent resistance to high and low temperatures, and can maintain elasticity under various extreme conditions; The rubber seals used in medical devices ensure the airtightness and reliability of the equipment