Exchangeable filter element

An exchangeable filter element especially for nuclear installations for the purification of gas streams which contain toxic or radioactive matter, said filter element comprising a rigid frame closed on all sides and adapted to be inserted into a filter housing, said filter element further comprising a filter element for removing suspended matter;

• means sealing said filter element in said frame, said filter element being removable from said frame, said filter element being reduced in volume by means of pressure after said removal, said filter element further comprising a plurality of individual, V-shaped filter pockets which are arranged side by side, said filter pockets having flanges surrounding the open sides of these filter pockets and being removable, said flanges of all V-shaped pockets being gas tight and enclosed by a common encirculating mounting frame, which mounting frame consists of elastic breakable material, the encirculating edge of which mounting frame being tightly insertable in the housing which serves to receive the filter and where the filter pockets are freely suspended.