The plate heat exchanger is a very efficient heat exchange device, which is mainly composed of plates and gaskets. Seal failure of plate heat exchangers is an important failure. What are the reasons for the failure of the plate heat exchanger seal?
(1) Pressure effect: The plate heat exchanger generates leakage when it is used in the rated working pressure. In addition to the quality factor of the device in the manufacturing assembly, it is generally related to the abnormal impact load appearing in the system.This is a situation that is not easy for ordinary operators to view.The instantaneous pressure peak caused by the impact is often about 2 times higher than the normal working pressure, and the rubber gasket installed inside the plate heat exchanger is displaced, so that the plate heat exchanger seal fails.
(2) Time impact: The equipment used or idle for several years, the self-aging of the sealing material may affect the sealing reliability, so the replacement of the new gasket should be replaced in time.
(3) Temperature effects: Rapid changes in temperature can also cause seal failure.When the temperature changes rapidly, the coefficient of linear expansion and the amount of elastic deformation of the rubber gasket and the sealing pre-tightening force do not match, so that the sealing pre-tightening force is lowered.The pressure resistance of the device is much lower than the rated design pressure.