Abstract: A diaphragm piston pump with a leakage control has a control unit in the area of the diaphragm, which can be activated by the pressure of the diaphragm during the suction stroke, wherein the control unit is hydraulically connected to a leakage replenishing valve, via which the sealing liquid can be discharged into the piston chamber of the diaphragm piston pump. The position of the diaphragm is not transmitted mechanically via a control rod and a rocker arm, but hydraulically. This makes it possible to achieve efficient leakage control without the spatial and mechanical restrictions of the prior art.

Abstract: A valve, a pump valve, and a pump including a pump valve has a valve housing in which a valve seat and a closing body that is movable in the axial direction, relative to the valve seat, are provided. The closing body is radially connected to the valve housing via at least one element made of flexible material and is radially connected to the valve housing at least at two axially mutually spaced clamping points by at least one element made of flexible material, in each case.

Abstract: A valve, a pump valve, and a pump including a pump valve has a valve housing in which a valve seat and a closing body that is movable in the axial direction, relative to the valve seat, are provided. The closing body is radially connected to the valve housing via at least one element made of flexible material and is radially connected to the valve housing at least at two axially mutually spaced clamping points by at least one element made of flexible material, in each case.