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Gasket selection considerations

The purpose of a seal is to contain or seal off a fluid from the exterior in order to protect it from contamination. A gasket is used between two stationary components to retain a static seal and create a barrier against the fluid. Considering the fact that the primary role of a gasket is to block leakage, when selecting the gasket, the material the gasket is made from should be taken into consideration, as well as the size, type and manufacturing process. A gasket is by nature and purpose a compressible material that has the ability to prevent leakages when clamped between two stationary parts. It is almost impossible to create two parts that fit perfectly without the possibility of a leak, so a compressible material placed in-betweens will act as a physical barrier against the fluid. In other words, a gasket must fill in any irregularity as to create a perfect seal. This is why gasket manufacturers also offer prototyping in Ottawa, to ensure the products they develop are a perfect fit. Most industries and machines require the use of gaskets and in some cases absolute precision is needed. Therefore, aerospace engineering companies for instance prefer to use custom made gaskets. You can order custom gaskets in Ottawa from specialised manufacturers. Following are some gasket selection considerations you should know before making a purchase.


The temperature


When selecting a gasket, the temperature of the fluid coming in contact with the gasket should be taken into consideration. If the material of the gasket is not capable of resisting at a certain required temperature, it will get deteriorated quickly and the liquid will leak. This is why it is important to pay attention to thermic resistance when making a purchase. This consideration will reduce the number of gaskets you can choose from considerably, making the selection process easier and faster. Reputable manufacturers such as can also develop gaskets from superior materials capable of withstanding extreme temperatures without performance problems.


The application


Equally important when selecting a gasket is its application. Depending on the type of the flange and flange metallurgy, as well as bolts used, you should choose a different type of gasket. The number, dimensions and grade of the bolts also determined the load available, while the contact dimensions are used to determine the surface area that will be compressed and require a gasket to fill in the irregularities. The selection of the gaskets also depends on the minor misalignment and flange bowing, as well as minor flange imperfections, because this system needs to have enough strength and flexibility to resists under applied load and maintain its integrity despite flange irregularities.


Other important considerations


Besides the points mentioned above, the pressure and media are also important things to consider when selecting a gasket. What is more, you should also make sure that it does not favour corrosion or contaminate the fluid. Another important but often underrated consideration is low maintenance. If you have a choice, you should pick an easy to clean and remove gasket.