How to choose the right gasket material for high temperature applications?
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For over 50 years Custom Gaskets Ltd. has been innovating, refining, and applying its skills in manufacturing sealing solutions to meet customers’ needs from all various industries. Custom Gaskets has extensive experience with the pulp and paper, petrochemical, construction, mining, water and waste, and refining industries. This expertise enables the company to become a primary supplier of a high quality gasket materials in Canada.
Your application dictates the gasket materials to use
Each application requires specific gasket material. The need for high temperature gaskets includes those with exhausts and chimneys, steam boiler processes, oil refineries, fireproof protection, power generation, chemical processing, and other engine operations. These applications require gaskets that can handle extreme heat temperatures which are often over 800°F or 426°C. However, there is no exact definition of what is considered high temperature when it comes to gaskets.
To straighten up things we can classify gasket temperature applications into three categories: moderate, high, and extremely high temperature.
Moderate Temperature Gaskets
Gaskets in this material can be used in all basic applications that do not require extremely high temperatures. Most of them are Elastomer gaskets (or sometimes called rubber gasket materials), which are made from silicone and rubber that consist of both synthetic and natural materials.
Another material is PTFE or Polytetrafluoroethylene (Chemours trademark of Teflon®). PTFE has a low coefficient of friction, excellent insulating properties, and is chemically inert to most substances. It also can withstand high heat applications up to 600°F and it is well known for its anti-stick properties.
High Temperature Gaskets
Consider these materials if your application is between 600 and 750°F. Generally, these materials are made of compressed sheet fibre which has high-density products that contain the most homogeneous combination of minerals, synthetic fibres, and elastomeric binders. It is designed to perform in applications involving air, water, steam, oils, acids, and general chemicals that require high temperature gaskets. High temperature gaskets include:
Below are some of the available high temp gasket materials:
Extreme High Temperature Gaskets
Materials that can handle a max temperature of 800°F to 5400°F. Custom Gaskets have both compressed sheets and flexible graphite gaskets suitable to handle these extreme temperatures.
Flexible graphite gasket material is one of the best available options to use in extreme heat conditions. It is made from 98% graphite and contains carbon between 95% and 99%. Flexible graphite allows for superior chemical resistance, thermal conductivity, and sealability. It can be available in plain or laminated sheets and with or without a metal reinforcement insert.
See some of the available materials:
Choosing the right gasket material for your applications is critical, especially in an environment where you may be sealing against aggressive chemicals or operating in high temperatures. Gasket pressure must also be considered and should refer to the material manual for the maximum PSI capacity of each product.
Custom Gaskets specializes in creating custom shaped gaskets of any size to meet customer requirements. Using an advanced CNC machine with great precision, combined with our 65 years of experience enables the team to construct the highest quality sealing products. Whether you are looking for low or high volume production, Custom Gaskets is here to support your ideas and produce sealing solutions for your applications.
Need advice?
Speak with one of the Custom Gaskets specialists to guide you with the most suitable gasket materials based on your application.
For more info contact us at 604-263-1426 or fill out the form below.
