Abstract: The invention relates to a device for the recovery of a processed liquid in the form of a condensate from a liquid to be processed by evaporation and condensation, having at least one first flow region which is provided in a working space for the development of a first sheetlike flow of the liquid to be processed and at least one condensing surface, adjacent to the first flow region and cooler in temperature than the first flow, for liquid evaporated at the first flow region.The invention is characterized in that a second flow region is adjacent to the at least one first flow region in the common working space for the development of a sheetlike second flow, and in that the condensing surface is formed of the surface of the liquid of the at least one second flow region.

Abstract: The operating chambers in a pulsator have axially movable partitions that make it possible to vary their capacities. The primary effect of varying the capacities is to vary the rate of the pulsator in a very simple way. It is also possible, however, to eliminate any wobble that may occur by varying the capacities of the chambers individually.

Abstract: A pulsator for milking machines has two diaphragms connected by a rod with each diaphragm dividing a pressure chamber into a processing space and a damping space. The damping spaces communicate through a channel that is provided with a throttle. The processing spaces are connected either to a source of vacuum or to the atmosphere. A switchover is attached to the rod and connects lines leading to the pulsation spaces of milking containers either to the atmosphere or to a source of vacuum. A main line is provided with a throttle. The throttles in the communicating channel and in the main line are detoured by bypasses provided with chokes that can be vacuum-activated through control channels.