Abstract: A pump receiver housing of a hydraulically operated pressing apparatus designed in a compact and lightweight manner and that connects a drive unit to a piston cylinder unit and to a press unit. A piston pump assembly is connected to a pump flange pressed directly onto a connection cylinder of the piston-cylinder unit. The connection cylinder projects through a pump lead-through in the housing wall into the pump receiver housing, and directly contacts on the pump piston. Thus, the pump receiver housing is designed without conduits, so that an inside of the pump receiver housing is free of or has no high pressure.

Abstract: The invention concerns a device for increasing the relative humidity of an air flow (13), comprising air humidifying means (25) which are arranged in the air flow (13), and which are configured to supply humidifying water to the air flow (13). The invention is characterized in that said air humidifying means (25) are connected to a humidifying circuit (5) which comprises a recycling pump (7) for recycling the humidifying water in the humidifying circuit (5), and a humidifying heat exchanger (13) for heating the humidifying water so that it reaches a temperature lower than boiling point. The invention aims at creating a device enabling the humidifying power to be significantly increased, at a low cost and with little space requirement. Therefor, the humidifying means include a hollow porous material (15) which is connected to the humidifying circuit (5).