Abstract: A filter device includes a plurality of filter elements (21) received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid. Flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43) actuated by a hydraulic piston (53) and blocks the fluid connection so quickly, a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21). The feeding effect increases the cleaning of pollution on the filter element (21), achieving an improved backwashing cleaning.

Abstract: A filter device having a multiplicity of filter elements (2) which can be held in a filter housing (4) having a filter inlet (6) for a fluid (8) to be filtered and having a filter outlet (10) for the filtered fluid (12), wherein the filter elements (2) can be traversed by flow in both directions for filtration or back-flushing, is characterized in that, between at least a part of the filter elements (2) and the filter outlet (10), in each case one further filter element, in particular in the form of a fine filter element (14), is arranged in regions of the flow path of the fluid which is pre-filtered by the respective filter element (2) assigned to the further filter element (14).

Abstract: The invention relates to a system for purifying gas, comprising at least one housing (2) comprising a first chamber (6) into which the gas to be purified can flow, and a second chamber (10) forming a filter chamber, out of which the purified gas exits and comprising a filter device through which the gas can flow having filter media (54) both for separating out solid particles and for dehumidifying the gas for precipitating coalesced fluid, the first chamber (6) comprising a cyclone (60) for pre-dehumidifying the gas, from which dirt particles and fluids can be discharged into a third chamber (14) of the housing (2), characterized in that the housing (2) is composed of an upper housing part (8) comprising the second chamber (10) forming the filter chamber, a middle housing part (4) comprising a first chamber (6) having the cyclone (60), and a lower housing part (12) forming the third chamber (14), that can be clamped together by means of at least one tensioning bolt (32), forming a closed pressure vessel.

Abstract: The invention relates to a filter device, comprising a plurality of filter elements (21), which can be received in a filter housing having a filter inlet for a fluid to be filtered and a filter outlet for the filtered fluid, wherein flow through the filter elements (21) is possible in both directions for filtration or backwashing. Because the shut-off element (41) is a fast-closing plate valve (43), which can be actuated by means of a hydraulic piston (53) and blocks the fluid connection mentioned above so quickly that a feeding effect is created in the manner of a pressure blow on the backwashed filter element (21), said feeding effect increasing the cleaning of pollution on the filter element (21), an improved backwashing cleaning is achieved.