Leakage
It is mainly manifested as leakage (small amount, discontinuous water droplets) and leakage (large amount, continuous water droplets). The main parts of external leakage are the sealing part between plates, the second sealing groove of plates, and the inner side of end plates and compression plates.
Efflux
The main feature is that the medium on the higher side of the pressure runs into the medium on the lower side of the pressure, and there will be abnormal pressure and temperature in the system. If the medium is corrosive, it may also cause corrosion of the sealing gasket of plate heat exchanger. The cross flow usually occurs in the diversion area or the secondary sealing area.
High pressure drop
The pressure drop at the inlet and outlet of the medium exceeds the design requirements, even many times higher than the design value, which seriously affects the requirements of the system on flow and temperature. In the heating system, if the pressure drop at the hot side is too large, the flow at the primary side will be seriously insufficient, that is, the heat source is not enough, resulting in the outlet temperature at the secondary side can not meet the requirements.
The heating temperature cannot meet the requirements
The main feature is that the outlet temperature is too low to meet the design requirements.