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          Valve Seat

          • VALVE SEAT



             Product introduction 

            Using an elastic sealing material and a small actuator thrust to obtain a bubble tight stage seal, the compression seat sealing stress makes the material elastic deformation and squeeze into the rough surface of the metal parts to block the entire leakage path. The permeability of a material is the basis for a small amount of leakage in a fluid.


            If the material is too soft, or cold deformation (creep) occurs under load, it may be hardened by packing such as fiberglass. If used to make thin sheets, it can still meet the requirements of use, and can eliminate cold deformation or permanent deformation.


            Seals must be carefully secured to prevent rupture and leakage due to differential pressure. Soft seat bonding to metal parts is an option, but it does not completely solve the problem, as the bonding will break and fail due to thermal shock. Large enough pressure drop will break the bond material.


             Material properties 

            Soft valve seat selection should be considered the material properties
            1) fluid compatibility, including expansion, hardness loss, permeability and degradation;
            2) hardness;
            3) permanent deformation;
            4) recovery degree after load elimination;
            5) pull and compression strength;
            6) deformation before fracture;
            7) modulus of elasticity.
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