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The softening of the elastic gasket is related to the pressure and temperature. When the gasket loses its elasticity, the plate heat exchanger will drip. In some products, in order to solve the leakage caused by the aging of the gasket, allowing the heat exchanger to adjust the sealing performance, that is, once again tighten the combination of plate heat exchanger bolts, adjust the heat exchanger between the elastic gasket The pressure to solve the drip problem.