Abstract: A valve arrangement is illustrated and described, in particular an electronic expansion valve arrangement, for pneumatic or hydraulic pressure media comprising a valve housing having a first medium connection and a second pressure medium connection, which are connected together by a throughflow space formed in a cavity of the housing, and a slider element which is arranged in the valve housing and cooperates with a valve seat, with the slider element being operationally connected to a positioning element of a drive and being displaceably guided parallel to the valve seat between a closed position, in which the one contact surface of the slider element closes a throughflow opening formed by the valve seat, and an open position, in which a throughflow passage formed in the slider element frees the throughflow opening.

Abstract: A hauler for extruded profiles has a pair of track assemblies engaging at least one profile between them. At least one of the profiles is mounted so that it can yaw about a longitudinal axis through the center of that track assembly and a handwheel, electric motor or spring mechanism is provided to effect a yaw of at least 2.degree. and up to 15.degree., preferably up to 4.degree. about this longitudinal axis.

Abstract: A compression-resistant spacer is provided between the lower track of a hauler and the calibrator mounting platform of a calibrator or sizer in a extrusion line to prevent vibration of the calibrator and minimize wall thickness variations and surface markings of extruded profiles such as window profiles.

Abstract: An embossing apparatus in an extrusion line for the production of sheet extrusions like vinyl siding, can include a revolver above the backing roll and supported in a pair of cradles so that selected embossing rolls can be juxtaposed with the backing roll and can define the embossing gap therewith. The revolver is indexed in position by pneumatically-operated locking members on the cradles. The revolver allows embossing roll change on the fly, if desired.