Plate Heat Exchanger Gaskets

Valutech specialists are available to assist you in finding the gasket with ideal composition and parameters to match your process, including gaskets that can withstand certain temperatures and pressures, as well as certain process media.

The following is a brief list of possible gasket materials, and their applications:

The chemical composition of a gasket will determine its lifespan and ability to handle various media; low quality gaskets (or those that are not proofed for the work) may not be able to withstand the operating conditions of the heat exchanger unit.

For example, EPDM (a synthetic polymer), is known for its resistance of corrosive media and its ability to withstand higher temperatures. However, EPDM swells in reaction to oils, contributing to premature degradation of the gaskets within a unit. In such a case where oil comes in contact with the gaskets, NBR (nitrile rubber) would be a more suitable choice; understanding the strengths and weaknesses of various materials allows you to choose gaskets that last longer, prevent unforeseen accidents and downtime of your process, and reduce the need for servicing over the lifespan of your plate heat exchanger unit.

The gaskets used in plate heat exchangers are complex organic systems, and are the result of extensive performance testing and industrial research. Their compositions are designed and engineering on a molecular level to achieve the ideal elasticity and attain properties that are suitable for dealing with certain process media.

Vulcanizing chemicals (such as sulfur) allow substances to bind, creating cross-linked polymeric substances. This allows the native polymer to be combined with components that possess the necessary properties of a heat exchanger gasket.

Fillers contribute to the volume and rigidity of the rubber, while providing resistance to tension. Carbon black, a commonly-used industrial filler, gives gaskets their distinct colouration.

Anti-degradants prevent the natural aging of the rubber by compounds and atmospheric elements during operating processes.

Valutech works with industry leaders, such as Alfa Laval, who work year-round in an effort to research and test potentially beneficial gasket components. The following is Alfa Laval’s thorough six-step process to determine whether a new material is ideal for use in their gaskets: