Heat exchanger gaskets are the core sealing components of plate heat exchangers. Their functions include sealing, adjusting channel clearance, buffering and shock absorption, and corrosion protection. They are mainly made of materials such as nitrile rubber, EPDM rubber, fluororubber, asbestos rubber sheets, asbestos sheets, and polyethylene sheets. For some high-pressure applications, copper, aluminum, or stainless steel metal gaskets are used. Structurally, they are classified as metal-clad, spiral wound, and symmetrical/asymmetrical profiles. Symmetrical gaskets can be installed on diagonal flow plates from both sides. Material selection depends on the medium characteristics; nitrile rubber is suitable for oils, while the food industry requires compliance with FDA standards.
The applicable temperature range of these gaskets varies depending on the material (asbestos rubber sheets can reach 450℃), and pressure ratings cover low pressures up to 5MPa. Installation methods include adhesive, embedded, and snap-on types. The fixing method is crucial to ensuring correct installation and stable operation. Based on flow pattern, they are divided into single-sided flow and diagonal flow designs with higher heat exchange efficiency, compatible with nearly 600 models from international brands such as Alfa Laval and APV. Widely used in cooling, sterilization and heat exchange systems in industries such as chemical, power, shipbuilding and pharmaceutical, high-pressure metal gaskets adopt line contact design, and the sealing surface and gasket have a high degree of surface finish. Some products have passed ISO9001 quality system certification.
