A compressor for compressing a fluid, comprising: a housing having an inlet for receiving the fluid and an outlet returning the fluid; a compressor mechanism adapted to compress a fluid toward the outlet, the compressor mechanism housed in the housing; a drive unit operatively connected to the compressor mechanism for driving the compression mechanism to compress fluid; a suction duct in the housing having an inlet region at a sealing face arranged over the inlet of the housing for ducting fluid into the compressor, the suction duct having at least one channel facing the housing forming at least one flow passage therebetween; wherein the suction duct is a ring body, the ring body comprises a plurality of outer wall sections connected by and projecting outward from recessed wall sections, wherein the suction duct defines an inlet port extending through the ring body, the inlet port aligned with the inlet to communicate fluid from the inlet directly into the electrical motor, wherein the housing comprises a generally cylindrical shell section, wherein one of the outer wall sections seals against an internal surface of the cylindrical shell section, and the recessed wall sections are spaced from the housing and each form one channel with at least one stabilizing rib in each channel dividing the channel into at least two sub channels, the at least one stabilizing rib projecting radially outward from the recessed wall section and being adapted to contact the internal surface of the cylindrical shell section to stabilize the suction duct, the at least one stabilizing rib being integrally formed along the recessed wall sections to provide thicker wall thickness through the body of the rib, the channel channeling lubricating oil through gravitational drainage between the internal surface and the suction duct and around the rib, characterised in that the ring body of the suction duct including the outer peripheral wall sections and recessed wall sections are all made from a resilient plastic material to form a spring bias mechanism that along with the undulating nature of the ring body of the suction duct act to apply a pressure between the housing and the sealing face such that a seal is formed at the sealing face. a housing having an inlet for receiving the fluid and an outlet returning the fluid; a compressor mechanism adapted to compress a fluid toward the outlet, the compressor mechanism housed in the housing; a drive unit operatively connected to the compressor mechanism for driving the compression mechanism to compress fluid; a suction duct in the housing having an inlet region at a sealing face arranged over the inlet of the housing for ducting fluid into the compressor, the suction duct having at least one channel facing the housing forming at least one flow passage therebetween; wherein the suction duct is a ring body, the ring body comprises a plurality of outer wall sections connected by and projecting outward from recessed wall sections, wherein the suction duct defines an inlet port extending through the ring body, the inlet port aligned with the inlet to communicate fluid from the inlet directly into the electrical motor, wherein the housing comprises a generally cylindrical shell section, wherein one of the outer wall sections seals against an internal surface of the cylindrical shell section, and the recessed wall sections are spaced from the housing and each form one channel with at least one stabilizing rib in each channel dividing the channel into at least two sub channels, the at least one stabilizing rib projecting radially outward from the recessed wall section and being adapted to contact the internal surface of the cylindrical shell section to stabilize the suction duct, the at least one stabilizing rib being integrally formed along the recessed wall sections to provide thicker wall thickness through the body of the rib, the channel channeling lubricating oil through gravitational drainage between the internal surface and the suction duct and around the rib, characterised in that the ring body of the suction duct including the outer peripheral wall sections and recessed wall sections are all made from a resilient plastic material to form a spring bias mechanism that along with the undulating nature of the ring body of the suction duct act to apply a pressure between the housing and the sealing face such that a seal is formed at the sealing face.