A compressor comprising: a duct defining a main gas flow axis; a row of compressor blades that draw a fluid through the duct and impart thereto a momentum along a main gas flow direction and a swirl; a discharge volute configured to receive fluid compressed by said row of compressor blades and to supply fluid to a component separate from said compressor; and a housing comprising: a first volute configured to extend substantially circumferentially around and fluidly communicate with the duct, said first volute being configured to direct a fluid portion flowing thereinto from said duct to have a velocity with a component in a first circumferential direction generally aligned with the swirl; a second volute configured to extend substantially circumferentially around and fluidly communicate with said duct; further comprising; at least one conduit providing fluid communication between said first volute and said second volute, characterized in that said at least one conduit includes an entrance region proximal to said first volute and configured to receive therein the fluid portion having the velocity with the component in the first circumferential direction and an exit region proximal to said second volute and configured to direct the fluid portion to have a velocity with a component along the second circumferential direction opposed to the first circumferential direction, and wherein said second volute is configured to receive the fluid portion from said exit region and to direct the fluid portion to have a velocity with a component in the second circumferential direction. a duct defining a main gas flow axis; a row of compressor blades that draw a fluid through the duct and impart thereto a momentum along a main gas flow direction and a swirl; a discharge volute configured to receive fluid compressed by said row of compressor blades and to supply fluid to a component separate from said compressor; and a housing comprising: a first volute configured to extend substantially circumferentially around and fluidly communicate with the duct, said first volute being configured to direct a fluid portion flowing thereinto from said duct to have a velocity with a component in a first circumferential direction generally aligned with the swirl; a second volute configured to extend substantially circumferentially around and fluidly communicate with said duct; further comprising; at least one conduit providing fluid communication between said first volute and said second volute, characterized in that said at least one conduit includes an entrance region proximal to said first volute and configured to receive therein the fluid portion having the velocity with the component in the first circumferential direction and an exit region proximal to said second volute and configured to direct the fluid portion to have a velocity with a component along the second circumferential direction opposed to the first circumferential direction, and wherein said second volute is configured to receive the fluid portion from said exit region and to direct the fluid portion to have a velocity with a component in the second circumferential direction. a first volute configured to extend substantially circumferentially around and fluidly communicate with the duct, said first volute being configured to direct a fluid portion flowing thereinto from said duct to have a velocity with a component in a first circumferential direction generally aligned with the swirl; a second volute configured to extend substantially circumferentially around and fluidly communicate with said duct; further comprising; at least one conduit providing fluid communication between said first volute and said second volute, characterized in that said at least one conduit includes an entrance region proximal to said first volute and configured to receive therein the fluid portion having the velocity with the component in the first circumferential direction and an exit region proximal to said second volute and configured to direct the fluid portion to have a velocity with a component along the second circumferential direction opposed to the first circumferential direction, and wherein said second volute is configured to receive the fluid portion from said exit region and to direct the fluid portion to have a velocity with a component in the second circumferential direction.