Gaskets are mechanical seals that prevent leaks between separate substrate sections. They are occasionally made of metal because they must be durable enough to withstand extreme pressures and wear. (In fact, the phrase “blowing one’s gasket” refers to the unwanted result that occurs when pressure builds up too much and a gasket ruptures or fails in some way.) However, many gaskets, such as O-rings, can be made out of synthetic rubbers or silicone. These thick rubbers are robust enough to handle the kinds of extreme pressure and wear associated with gasket applications.

 

Types of Synthetic Rubbers Used in Gaskets

Many types of synthetic rubbers are used to manufacture rubber gaskets, primarily due to the multitude of different environments faced by different applications. Some rubbers will be needed to withstand both extreme cold as well as extreme heat, while others will be exposed to chemicals that may act as corrosives and could pose dangers to many types of rubber. This makes heat and cold resistance, weatherability, and a lack of absorption a premium for gasket rubber, but toughness, flexibility, and friction properties are not to be discounted.

 

The following list of materials is not intended to be comprehensive, but rather to represent some of the more common types of rubber used in rubber gasket production.

 

  • Nitrile rubber, or Buna-N, is a general purpose rubber with a good temperature range (-65 to 300 degrees F). It has good wear resistance and will not easily crack.

 

  • Ethylene Propylene (EPR) works well with hydraulic fluids that are corrosive and dangerous when exposed to human skin. Because of its high resistance to corrosive fluids, it is generally well-suited to applications that experience some amount of contact with other types of liquids.

 

  • Fluorocarbon, often sold under the trade name Viton, is another all-purpose rubber that has a higher temperature range than nitrile rubber. It can be used in many diverse applications such as oils, fluids and gases, as well as certain types of acids.

 

  • Neoprene has a low temperature range and can be used in applications where temperatures dip as low as -65 degrees F. For this reason, it is often used with refrigerants in refrigeration and air conditioner units. Unfortunately, neoprene sometimes features lead components. For that reason it is important to take precautions when handling or using neoprene to prevent human health issues.

 

  • Polyurethane is another rubber with a low temperature limit, although it has worse upper echelon heat resistance capability than neoprene. It is used in some of the coldest environments because even when chilled or frozen it will not grow brittle and tear or crack.

 

  • Silicone is typically used for extreme temperatures, but it does not perform well in applications that require extreme tear resistance or much movement and pressure.

 

  • PTFE can withstand very high heat (up to 500 degrees F) while maintaining dielectric strength and chemical inertness. Because it resists all water, it is used in many applications where water can be an issue.

 

Rubber Gasket Applications

Gaskets are used in a wide variety of applications in a diverse range of environments, so factors like those listed above must be accounted for. Gasket types include O-rings, which are the most common type of gasket made of synthetic rubber, and account for a large portion of rubber gasket use. However, many other basic gasket seals are made out of rubber for commercial and industrial use on pipes, wood, and other applications. These gaskets can perform well with other rubber materials, various kinds of metal and even wood. Sealant must be incorporated to ensure a solid seal.

 

If you need more information about rubber gasket, Chain Yeeh Industrial Co., Ltd. is a good choice. The company specializes in producing kinds of gaskets and seals. Try to visit their website to gain the details you need.

 

 

Article Source: https://www.thomasnet.com/articles/plastics-rubber/gaskets-rubber/

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