A valve for installation in a valve bore of a housing or valve block includes a valve bushing for insertion into the valve bore, a guided valve piston that can be moved axially in the valve bushing, an activation section of said piston projecting above the valve bushing axially, and a valve cover th
A valve for installation in a valve bore of a housing or valve block includes a valve bushing for insertion into the valve bore, a guided valve piston that can be moved axially in the valve bushing, an activation section of said piston projecting above the valve bushing axially, and a valve cover that is configured to be arranged over the valve bore and that forms, together with the activation section of the valve piston, at least one activation pressure chamber.
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1. A valve for installing in a valve bore of a housing or of a valve block, the valve comprising: a valve bushing configured to be inserted into the valve bore;a valve piston guided in an axially movable manner in the valve bushing, the valve piston configured to project axially above the valve bush
1. A valve for installing in a valve bore of a housing or of a valve block, the valve comprising: a valve bushing configured to be inserted into the valve bore;a valve piston guided in an axially movable manner in the valve bushing, the valve piston configured to project axially above the valve bushing by means of an actuating section; anda valve cover arranged over the valve bore, the valve cover together with the actuating section of the valve piston forming at least one actuating pressure space, the valve cover divided axially into at least two components, an intermediate cover configured to guide the actuating section in a main bore and a functional cover provided on the intermediate cover on the side remote from the valve bushing, said functional cover having at least one control channel, wherein:control connections and/or fastening means are arranged with respect to the main bore of the intermediate cover such that changing an alignment of the intermediate cover in predetermined angular steps about a longitudinal axis of the valve bore connects a control channel of the intermediate cover to different control connections of the housing or valve block. 2. The valve as claimed in claim 1, wherein: the actuating section divides the main bore into an actuating pressure space on the functional cover side and into an actuating pressure space on the valve bushing side,the intermediate cover has a further control channel for the actuating pressure space on the valve bushing side, andonly the at least one control channel of the functional cover opens into the actuating pressure space on the functional cover side and only the further control channel of the intermediate cover opens into the actuating pressure space on the valve bushing side. 3. The valve as claimed in claim 1, wherein a bottom surface of the main bore of the intermediate cover is formed on the functional cover. 4. The valve as claimed in claim 1, further comprising a spring arranged in the main bore between the functional cover and the valve piston. 5. The valve as claimed in claim 1, wherein the functional cover has means for producing a hydraulic function that includes one of a pilot control valve, a throttle, a connecting surface for a pilot control valve, a lift stop, a displacement sensor, and a switching position monitor. 6. The valve as claimed in claim 1, wherein the intermediate cover has means for producing a hydraulic function that includes one of an actuation lock, a lift stop, a displacement sensor, a switching position monitor, a throttle, a pilot control valve, and a connecting surface for a pilot control valve. 7. The valve as claimed in claim 1, wherein the valve piston is formed integrally with the actuating section. 8. The valve as claimed in claim 1, wherein the actuating section is formed on an actuating piston which is coupled to the valve piston in a manner free from play axially. 9. The valve as claimed in claim 1, wherein the valve is configured as a seat valve, or as a seat slide valve. 10. The valve as claimed in claim 1, wherein on the end side of the intermediate cover which faces the functional cover there is a standardized connection diagram, at least with regard to control connections. 11. The valve as claimed in claim 1, wherein the valve bushing is structured so as to be insertable without a projecting length into a standardized valve bore. 12. The valve as claimed in claim 11, wherein the intermediate cover has a radially extending contact surface for the valve bushing, and/or the intermediate cover has an overhang, which is insertable into the valve bore, for receiving the valve bushing. 13. The valve as claimed in claim 1, further comprising a seal provided between the valve bushing and the valve piston. 14. The valve as claimed in claim 1, wherein a seal is provided between the actuating section and the main bore of the intermediate cover. 15. The valve as claimed in claim 14, wherein the main bore of the intermediate cover includes a recess configured to receive the seal such that the seal is provided between the actuating section and the main bore. 16. The valve as claimed in claim 1, wherein between the valve bushing and the valve piston there is a clearance fit, which can be produced without fine machining of the valve piston. 17. The valve as claimed in claim 1, wherein between the actuating section and the main bore there is a clearance fit, which can be produced without fine machining of the actuating section. 18. The valve as claimed in claim 1, wherein the main bore has a smaller cross section at a mouth on the functional cover side than at a mouth on the side remote from the functional cover. 19. The valve as claimed in claim 1, wherein: the valve bushing and the intermediate cover are configured as a preassembled constructional unit,the valve piston is inserted into the valve bushing, andthe valve piston is inserted into the main bore of the intermediate cover via the actuating section. 20. The valve as claimed in claim 19, wherein the preassembled constructional unit comprises sealing rings positioned between the valve bushing and the valve piston, and between the actuating section and the main bore of the intermediate cover. 21. The valve as claimed in claim 1, wherein: the functional cover is affixed to the intermediate cover such that the functional cover does not contact the valve block, andthe functional cover extends to cover an entire bottom surface of the intermediate cover.
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