Abstract: A swirl chamber comprises a housing, which at its shell or side wall is connected to at least one tubular port having a center line which is approximately at right angles to and spaced from the axis of the housing. In the improved swirl chamber at least two tubular ports extend through the shell or side walls and with respect to radii of said housing which intersect said ports at their inner ends are inclined in the same sense in a peripheral direction of the housing, the housing is closed at opposite ends by end plates or end walls, which are intersected by the axis of the housing, and an inlet nozzle is provided in one end plate and a discharge tube in the other.