Hydraulic machine

A hydraulic machine comprising a first member having a first structure for a hydraulic medium opening in a first interface surface and a second member having a second structure for the hydraulic medium opening in a second interface surface, the first interface surface being in contact with the second interface surface, wherein at least one of the members is provided with a support element surrounding the member, wherein the support element comprises a strength varying in circumferential direction around the member and/or in thickness direction in a middle region of the member, and wherein, when the support element comprises a strength varying in thickness direction, the strength of the support element varies depending on the resistance against deformation of the member in a direction parallel to its interface surface such that in a thickness direction of the support member there are parts of the support member configured to provide a larger resistance against a radial deformation than other parts of the support member in the thickness direction which are configured to provide a smaller resistance against a radial deformation.