Plate heat exchanger is a very efficient heat transfer equipment, its application is very wide, plate heat exchanger most core components are plate heat exchanger plate and sealing gasket. The level of development of the sealing gasket directly determines the level of development of the plate heat exchanger, plate heat exchanger sealing failure is a very serious production failure, then the plate heat exchanger sealing gasket is what performance to protect the sealing effect?
In fact, it is the following six characteristics, so that the plate heat exchanger sealing gasket has a strong sealing effect.
Incompressibility
Synthetic rubber like a fluid can change its shape, of course, it is not possible to flow, when the pressure to deform it after the disappearance of extrusion pressure, it can be restored to its original shape (that is, the gasket in the compression process of its volume is unchanged, to the size of the pressure change).
Strength
Should have enough strength to withstand the extrusion pressure to make it into the sealing state and to withstand high-pressure fluid medium (i.e., the tensile strength of the rubber gasket, fixed-extension strength and other physical properties).
Plasticity
The formulation should be adjusted so that it achieves both sufficient strength to comply with the use and sufficient plasticity to enable it to fit tightly to the metal surface under the appropriate pressure to produce a sealing function (the gasket profile achieves consistency with the shape of the sealing plate grooves).
Penetration resistance
Synthetic rubber's polymer three-dimensional mesh structure is able to resist the penetration of any liquid with different chemical properties (media resistance).
Temperature resistance
The rubber in polymer materials has the disadvantage that all synthetic rubber materials can only be used in a relatively narrow temperature range in terms of temperature resistance. It is therefore important that the formulation of the material is carefully selected according to the temperature required for the application.
Durability
Many of the newer synthetic materials are characterised by a longer service life than older models due to the use of new additives which further extend the service life. In this regard, the correct choice of synthetic material formulations is very important, all rubber-based synthetic materials will occur stress relaxation phenomenon, in the process of use, due to chemical changes within the synthetic material, the initial sealing function will gradually decline, and when the sealing performance is lower than the compression limit, leakage will inevitably occur.
