Abstract: Flow-through device for treating a fluid, mainly including a housing in the shape of a pot (2) with a lid (3) which is provided with an inlet (4) and an outlet (5) for the fluid and an exchangeable tubular flow-through element (6) provided in the housing which is provided with a medium (7) for treating the fluid, whereby this element (6) fits against the lid (3) and forms a separation between the space (12) on the inside of the element (6) which is connected to the inlet (4) and the space (16) on the outside of the element (6) which is connected to the outlet (5), wherein in the space (12), on the inside of the element (6) opposite the inlet (4), is provided a tube (20) forming an extension of the inlet, which tube mainly extends in the axial direction (X-X?) of the element (6) and which is provided with lateral passages (21) for evenly distributing the fluid to be treated over the length of the flow-through element (6), whereby this tube has a narrowing cross section lengthwise in the axial direction of the

Abstract: Inlet piece for a liquid-injected compressor element, characterized in that it comprises a sleeve (8) which consists of a casing (11), a bottom wall (12) provided with an opening (13) and a top wall (14) which is entirely tight, a pipe (9) opening on the inside of the sleeve (8) and a partition (10) comprising a span part (15) which spans the opening (13) in the aforesaid bottom wall (12) and which transforms into an inclosing part (16) reaching down to the bottom wall (13), whereby the partition (10) leaves a passage (18) on one side of the opening (13) and the pipe (9) opens in the sleeve (8) between the top wall (14) and the span part (15), such that, because of the partition (10), gas flowing from the opening (13) to the pipe (9) has to make among others a revolving movement.