Abstract: A control device for a hydraulic control motor includes at least one valve controlled actively by an actuating force and at least one passive valve which is operatively connected to the actively controlled valve and which is co-controlled via a line.

Abstract: A valve assembly kit permits the assembling of a plurality of different slide valves each having an elongated housing element formed with a main passage, fluid passages communicating with the main passage, and fluid ports which also communicate with the main passage, and an elongated valve spool element slidably receivable in the main passage. One or both of these elements comprises a plurality of diverse but interchangeable components which can be coaxially assembled in different sequences so as to obtain a selectable configuration of the respective element.