An assembly comprising a rotary valve system (10, 300), comprising: a first valve body (30, 330) having a first plurality of fluid channels, each one of the first plurality of fluid channels (44.1-44.4; 344.1-344.8) having a common first inlet (42.1) to receive a fluid and a first outlet (50.1-50.4; 350.1-350.8); a second valve body (32, 332) coupled to the first valve body, the second valve body having a second plurality of fluid channels, each one of the second plurality of fluid channels (74.1-74.4; 374.1-374.8) having a second inlet (76.1-76.4; 376.1-376.8) and a second outlet (72.1); and a plate assembly (34, 334) including a plate (96; 396) coupled between the first valve body and the second valve body, the plate defining a plurality of openings (108; 408), the plate movable between at least a first, open position in which the first outlet of at least one of the first plurality of fluid channels is in fluid communication with the second inlet of at least one of the second plurality of fluid channels and a second, closed position in which the second inlet of each of the second plurality of fluid channels is substantially completely obstructed by the plate, wherein the first plurality of fluid channels (44.1-44.4; 344.1-344.8) are defined within the first valve body (30, 330) and are spaced apart about a perimeter of the first valve body, wherein the second plurality of fluid channels (74.1-74.4; 374.1-374.8) are defined within the second valve body (32, 332) and are spaced apart about a perimeter of the second valve body, with each one of the first plurality of fluid channels in selective fluid communication with a respective one of the second plurality of fluid channels, wherein each one of the first plurality of fluid channels (44.1-44.4; 344.1-344.8) extends from the common first inlet (42.1) along a common wall and diverges downstream from the common first inlet to define a cavity, with a portion of the plate assembly received within the cavity, wherein each one of the second plurality of fluid channels extends from the second inlet and converges downstream from the second inlet along a second common wall upstream from the second outlet, and wherein the second valve body includes a shaft defined internally within the second valve body and the plate is coupled to the shaft for movement relative to the second valve body and the first valve body, characterised in that the assembly further comprises an outlet flange including a plurality of flow channels defined within the outlet flange about a circumference of the outlet flange and in that each of the flow channels (324.1-324.8) has a respective inlet at a first end of the outlet flange, which is in fluid communication with the first common inlet (42.1). a first valve body (30, 330) having a first plurality of fluid channels, each one of the first plurality of fluid channels (44.1-44.4; 344.1-344.8) having a common first inlet (42.1) to receive a fluid and a first outlet (50.1-50.4; 350.1-350.8); a second valve body (32, 332) coupled to the first valve body, the second valve body having a second plurality of fluid channels, each one of the second plurality of fluid channels (74.1-74.4; 374.1-374.8) having a second inlet (76.1-76.4; 376.1-376.8) and a second outlet (72.1); and a plate assembly (34, 334) including a plate (96; 396) coupled between the first valve body and the second valve body, the plate defining a plurality of openings (108; 408), the plate movable between at least a first, open position in which the first outlet of at least one of the first plurality of fluid channels is in fluid communication with the second inlet of at least one of the second plurality of fluid channels and a second, closed position in which the second inlet of each of the second plurality of fluid channels is substantially completely obstructed by the plate, wherein the first plurality of fluid channels (44.1-44.4; 344.1-344.8) are defined within the first valve body (30, 330) and are spaced apart about a perimeter of the first valve body, wherein the second plurality of fluid channels (74.1-74.4; 374.1-374.8) are defined within the second valve body (32, 332) and are spaced apart about a perimeter of the second valve body, with each one of the first plurality of fluid channels in selective fluid communication with a respective one of the second plurality of fluid channels, wherein each one of the first plurality of fluid channels (44.1-44.4; 344.1-344.8) extends from the common first inlet (42.1) along a common wall and diverges downstream from the common first inlet to define a cavity, with a portion of the plate assembly received within the cavity, wherein each one of the second plurality of fluid channels extends from the second inlet and converges downstream from the second inlet along a second common wall upstream from the second outlet, and wherein the second valve body includes a shaft defined internally within the second valve body and the plate is coupled to the shaft for movement relative to the second valve body and the first valve body, characterised in that the assembly further comprises an outlet flange including a plurality of flow channels defined within the outlet flange about a circumference of the outlet flange and in that each of the flow channels (324.1-324.8) has a respective inlet at a first end of the outlet flange, which is in fluid communication with the first common inlet (42.1).