Abstract: An apparatus for drawing a pre-selectable quantity of liquid, in particular a quantity of water, comprises an input device, at which the respectively desired quantity of liquid to be delivered automatically can be fed in. Located in the path of the liquid is an electrically variable flow-control valve, whereof the position is varied automatically according to the pre-selected quantity of liquid, corresponding to a characteristic curve stored in a memory: the flow rate is chosen to be all the greater, the greater the pre-selected quantity of liquid. Due to this it is ensured that very different quantities of liquid can be drawn in times which are practical for use.

Abstract: In a sanitary fitting which is controlled without physcial contact at least one sensor is provided through which the water flow can be continuously adjusted. A pilot controlled valve is used for this which is operated by an electric motor. The rotation of the electric motor output shaft is converted into the linear movement of a plunger. This plunger in turn operates a closing device which opens or closes the pilot opening of a membrane. The membrane acts together with a valve seat to regulate the actual water flow. The design of the valve is such that in all positions between the fully open and fully closed position the membrane reliably follows the position of the closing device. Thus a continuous adjustment of the water flow is possible by using minimum power.