Causes of heat exchanger gaskets failure
The detachable 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, which is not easy to find for ordinary operators. In the case of the view, the instantaneous pressure peak caused by the impact is often about 2 times higher than the normal working pressure, so that the rubber gasket installed inside the plate heat exchanger is displaced, so that the plate heat exchanger seal fails. The heat transfer element is produced using a stainless steel sheet, its seal rigidity is relatively poor, and the perimeter of the seal is very long, so the impact resistance performance is lower than that of the shell-and-tube heat exchanger.
(2) Time factors
If the equipment is 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 factors
Rapid changes in temperature can also lead to seal failure. When the temperature changes rapidly, the coefficient of linear expansion and elastic deformation of the rubber gasket and the sealing pre-tightening force will not match, resulting in a decrease in the sealing preload, resulting in pressure on the device is much lower than the rated design pressure.