There is no uniform standard for the replacement cycle of Plate Heat Exchanger Gaskets. It is mainly judged comprehensively based on actual usage conditions, operating conditions and regular inspection results, with the core goal of preventing leakage caused by aging and failure of the gaskets.
First, consider the operating environment and medium characteristics. If the heat exchanger handles media with strong corrosion, high temperature (e.g., over 150℃) or large pressure fluctuations, the aging rate of the Plate Heat Exchanger Gasket will accelerate, and the replacement cycle needs to be shortened. Usually, inspection and evaluation should be conducted every 1-2 years. If the medium is mild and the temperature and pressure are stable, the cycle can be extended to 3-5 years.
Second, observe abnormal phenomena during operation. When the heat exchanger has medium leakage, significant decline in heat exchange efficiency, or abnormal noise and unstable pressure during operation, it may indicate the failure of the gasket's sealing performance. It is necessary to shut down the machine immediately for inspection and replace the gasket in a timely manner if confirmed, without waiting for the fixed cycle.
Finally, rely on regular inspection data. Dismantle the heat exchanger regularly to check whether the Plate Heat Exchanger Gasket has deformation, cracks, hardening or reduced elasticity. Pressure tests can also be used to detect the sealing effect. If the gasket has the above problems or fails the pressure test, it needs to be replaced with a new one even if the estimated cycle has not been reached.
