Alfa Laval Unique SSV valve seat, DN 65 / 63.5 mm. 1.4404 (316L), internal surface polished to Ra < 0.8 µm.
The seat that sits between the two bodies of a Unique SSV change-over valve. Alfa Laval supplies it loose for assembly, which is what makes the valve reconfigurable in the field. Position 28 in the change-over parts list.



