The plate sealing groove and the rubber sealing gasket together form the sealing system of the plate heat exchanger, and the sealing strength of the sealing system determines the pressure bearing capacity of the plate heat exchanger. A reasonable sealing system design not only improves the rigidity of the plate, but also improves the pressure resistance of the plate heat exchanger and ensures good sealing. The shape and structure of the sealing groove are directly related to the positioning of the sealing gasket in the sealing groove. The reasonable sealing groove should be designed so that the apv heat exchanger sealing gasket does not shift at the designed position under the condition of being pressed and heated, and basically maintains the original compression ratio guarantees sealing performance. Therefore, in the design of the sealing groove, taking into account the forming properties of the different materials, the inclination of the sealing groove is as small as possible, and the closed form is used as much as possible
The design of the sealing groove should pay attention to the structure of the two-way sealing. The two-way sealing is the weak area of the plate heat exchanger. The early design of the plate uses the spot welding reinforcing strip to increase the rigidity of the two-way sealing. The improvement of the processing level and the improvement of the metallurgical level, the method of pressing the reverse ribs (local cold work hardening during molding) is usually used to improve the rigidity of the second seal.