Yes, brazed plate heat exchangers require regular maintenance. Proper maintenance ensures heat exchange efficiency, extends service life, and prevents unexpected malfunctions. During maintenance, first check the appearance and sealing. Look for signs of leakage on the heat exchanger shell (such as media seepage or condensation). If leakage is found, stop the machine for inspection. This could be due to plate corrosion, aging gaskets, or damage to the brazing joints, requiring timely repair or replacement of the components. Next, perform cleaning maintenance. Clean the scale and impurities on the plate surface periodically (e.g., every 3-12 months). The specific interval depends on water quality and usage frequency. Prevent scale from affecting heat exchange efficiency. Cleaning methods can include chemical cleaning or physical cleaning (such as high-pressure water flushing). Then, check the inlet and outlet valves and pipelines to ensure valves open and close smoothly and pipelines are unblocked. If valves are stuck, lubricate or replace them. If pipelines are blocked, clean out impurities to avoid affecting media flow. In addition, monitor the heat exchanger's operating parameters (such as inlet and outlet temperatures and pressure difference). If a decrease in heat exchange efficiency is found (e.g., outlet temperature not meeting standards) or an increase in pressure difference, it may be due to scale buildup or blockage on the plates, requiring timely intervention. It is recommended to perform a routine inspection (appearance and parameter monitoring) once a month and a cleaning and maintenance every 3-6 months to ensure that the heat exchanger is always in good operating condition.
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