Plate heat exchanger gaskets are divided into unilateral flow and diagonal flow according to the flow of heat exchange medium. Unilateral flow means that the heat exchange medium flowing in from the right (left) corner hole of the heat exchange plate finally flows out from the right (left) corner hole. Diagonal flow means that the heat transfer fluid flows from the right (left) corner hole and then flows out from the left (right) corner hole. In terms of heat exchange efficiency, the diagonal flow method is better than the unilateral flow, but the cost of the unilateral flow method is relatively low. Therefore, when the heat exchange efficiency can be satisfied, the unilateral flow mode is generally adopted. Plate heat exchanger sealing gaskets are divided into 3 types according to the installation method on the heat exchange plate.
(1) Direct paste type. After applying sealant on the gasket, stick it directly into the mounting groove of the heat exchange plate.
(2) Plastic nail inlay type. An assembly hole is designed on the heat exchange plate, and a rubber nail is designed on the side of the sealing gasket. After the sealing gasket is put into the installation groove, the rubber nail is embedded in the assembly hole.
(3) Buckle type. A buckle is designed on the side of the gasket, and the buckle is used to buckle the gasket on the heat exchange plate. Adhesive gaskets are simple in structure and the easiest to process, but installation and disassembly are relatively troublesome. Inlaid and snap-mounted gaskets have complex structures and are more troublesome to process, but they are relatively easy to install and disassemble.