Abstract: A foot brake valve (2?) of a pneumatic brake system in a motor vehicle has an installation plate (4?), on which a brake pedal (14) is pivotably mounted and to which a housing (18?) of a control unit (16, 26) is fastened. A spring-loaded plunger piston (36) in actuating contact with the brake pedal (14) is guided axially movably in an annular collar (50) projecting upward out of the installation plate (4?). For fastening the housing (18?) of the control unit (16, 26) to the installation plate (4?), the housing (18?) has an intermediate flange (48) which is screw-connected to the main part of the housing (18?) and has the annular collar (50). The intermediate flange (48) is coaxially rotatably about a vertical central axis (32), and is connectable in non-positively locking fashion to the installation plate (4?) via a releasable clamping connection (62).

Abstract: A method and apparatus for simultaneously washing a plurality of generally tubular or sock-like filtering elements of a gas filtering apparatus without removing the elements from the apparatus, the filter elements being disposed in a regular array of rows and columns within a housing between an inlet and an outlet thereof. The method includes positioning in the housing a liquid conduit having a plurality of axially spaced spray nozzles for delivering washing liquid along one or more rows of elements and supplying washing liquid to the conduit.