Abstract: A solenoid valve with protective cap (10) having electrical connection elements (11, 13) attached to the cap fits only the electromagnet (2) of a solenoid valve (1). A cavity (12) situated in the cap makes it possible to add on circuit band unit (20) providing circuits which complement the solenoid valve but vary from user to user. Cable connection elements, elements for visual indication of the functional state, delay circuits, interference-suppressing circuits, intrinsic safety circuits, circuits for detecting the position of the moving core, circuits for detecting the presence of fluid, logical indexing circuits etc. may be mentioned as examples of circuit elements which complement the solenoid valve. The solenoid valve also comprises connection elements (18) which permit a rational and cableless electrical link between at least two solenoid valves.

Abstract: Setting device for a valve for the manual control of the position of a valve body. The handle portion of the setting device is provided with two wing portions extending in opposite circumferential directions outside a central portion of the handle portion. The handle portion can be manuvered by means of the screwdriver or the like, even in narrow spaces.

Abstract: In the system, heating device (2), quenching press (4), tempering device (6), and cooling device (8) are connected one directly after the other in such a way that the workpieces (10) pass through the individual stations with specified cycle times and without heat loss. The temperature-time response during the individual treatment steps is controlled by means of a central program control in accordance with a specified program determined by testing and/or calculation. The system is especially suitable for use in the fully automatic, thermomechanical treatment in mass production of disk springs, especially those which have a greater hardness at the free ends of the lamellae than in the remaining areas.