Steps and precautions for replacing gaskets in plate heat exchangers

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The gasket of a plate heat exchanger is a key component of the heat exchanger, and the application range and service life of plate heat exchangers are also influenced to a certain extent by the gaskets. Problems with the gaskets during use can cause the plate heat exchanger to fail to operate properly. Sealing gaskets not only serve to seal the fluid inside the heat exchanger, preventing it from leaking outside, but also prevent cross-contamination between the different fluids used in heat exchange. Therefore, when problems such as leakage, aging, cracking, or hardening occur in the gaskets of plate heat exchangers, they need to be replaced promptly using the correct methods; otherwise, issues like leakage and cross-contamination of fluids within the heat exchanger are likely to arise. The gasket of a plate heat exchanger is a key component of the heat exchanger, and the application range and service life of plate heat exchangers are also influenced to a certain extent by the gaskets. Problems with the gaskets during use can cause the plate heat exchanger to fail to operate properly. Sealing gaskets not only serve to seal the fluid inside the heat exchanger, preventing it from leaking outside, but also prevent cross-contamination between the different fluids used in heat exchange. Therefore, when problems such as leakage, aging, cracking, or hardening occur in the gaskets of plate heat exchangers, they need to be replaced promptly using the correct methods; otherwise, issues like leakage and cross-contamination of fluids within the heat exchanger are likely to arise. Below, the editor will provide a detailed explanation of the sequence for replacing the gaskets in plate heat exchangers, as well as the precautions to be taken: 1. Replacement sequence (1) Remove the old gasket. Be careful not to cause scratches in the gasket groove during disassembly. (2) Use propylene glycol, butyl glycol, or other similar solvents to remove the residual glue from the gasket groove. (3) Wipe the gasket groove and gasket clean with a clean cloth or cotton yarn. (4) Apply the adhesive evenly inside the gasket groove. (5) Attach clean new gaskets to the plate. (6) The plates with gaskets attached should be placed in a flat, shaded, and well-ventilated area to dry naturally before they can be installed and used. 2. Precautions: (1) Coating each heat exchanger plate with a fluorescent testing agent, and under ultraviolet light, checking for any tiny cracks or corrosion holes, followed by thorough cleaning again. In addition, it is necessary to carefully check the condition of the sealing groove and trim it if needed. (2) Inspect the mounting positions and quality of the gaskets for each plate heat exchanger, classify them according to the installation sequence, and then assemble the plate pack carefully and meticulously. (3) After cleaning, a high-pressure blowing device is used to remove any residual cleaning agents from the surfaces of the plate heat exchanger. (4) Inspection and testing of reuse performance. Inspect the wall thickness of heat exchangers and pipes in cases where rust is suspected. (5) Remove the aged and damaged gaskets from the plate heat exchanger, and select an appropriate cleaning method based on the type of dirt present for cleaning.