Abstract: A device for separating multiple-component fluids includes a truncated cone structure having a conical main section defined by a plurality of coaxially aligned and axially spaced rings of progressively diminishing inner diameters as viewed in the direction of movement of the fluids being separated. The largest ring is located at that end of the conical main section at which the fluid is admitted thereto, and the smallest ring is located at that end of the conical main section at which separated solid particles are discharged. Each ring has an inside surface which is convexly curved in a radial cross-section along the axis of the cone structure and faces in part counter to and in part across the direction of fluid flow. The inside surface of each ring meets the bottom surface of that ring in a sharp edge, with the tangent to the bottom surface at that juncture making an angle of at most 90.degree.