Patent ID: 7201097

Claim:
A diaphragm pump for pumping aggressive and/or abrasive media, comprising a diaphragm housing mounted in a substantially vertically disposed pipe system, which substantially vertically disposed pipe system comprises at least one inlet and at least one outlet positioned some distance above the inlet, as well as at least one substantially circular, flexible diaphragm having a circular outer edge, which diaphragm is movable within the diaphragm housing under the influence of a working liquid which is pressurised, with the circular outer edge of the diaphragm being clamped down in the diaphragm housing by means of a circular clamping member, wherein said clamping member defines a circular plane, characterized in that the circular clamping member is provided, on its circumferential edge, with a flange that extends parallel to the plane formed by the clamping member.