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A coaxial valve (10) has a valve housing (11) with an inlet port (12) and an outlet port (14) for a medium (15) flowing through the coaxial valve. A control tube is movable in its longitudinal direction in the valve housing (11) and interacts with the inlet port (12) and the outlet port (14) such th

A coaxial valve (10) has a valve housing (11) with an inlet port (12) and an outlet port (14) for a medium (15) flowing through the coaxial valve. A control tube is movable in its longitudinal direction in the valve housing (11) and interacts with the inlet port (12) and the outlet port (14) such that with the valve (10) opened medium (15) flows through the control tube. A valve seat within said valve housing has a valve seat face, the control tube interacting with the valve seat face in one of its axial end positions for closing the coaxial valve (10). The valve seat face is formed on a replaceable sealing element (22) which is arranged in an opening (19) of the valve housing (11), said opening (19), running essentially transversely with respect to the longitudinal direction.

대표청구항 ▼

1. A coaxial valve, comprising: a valve housing on which an inlet port and at least one outlet port for a medium which is to be conducted through the coaxial valve are provided;a control tube mounted in the valve housing and having a longitudinal direction, said control tube being movable in its lon

1. A coaxial valve, comprising: a valve housing on which an inlet port and at least one outlet port for a medium which is to be conducted through the coaxial valve are provided;a control tube mounted in the valve housing and having a longitudinal direction, said control tube being movable in its longitudinal direction between a first and a second axial end position within the valve housing and interacting with the inlet port and the outlet port in such a way that when the coaxial valve is in the first axial end position medium flows through the control tube;at least one valve seat arranged at the housing and having a valve seat face, the control tube interacting with the valve seat face in its second axial end positions in order to close the coaxial valve; anda control device for moving the control tube between its first and second axial end positions,wherein the valve seat face is formed on a replaceable sealing element which is arranged in a seat opening of the valve housing, said seat opening running essentially transversely with respect to the longitudinal direction,wherein at least two valve seat faces are provided on the sealing element, distributed circumferentially around a sealing element axis,wherein at least one positioning arrangement, which secures at least two circumferential orientations of the sealing element in the valve housing, is provided between the valve housing and the sealing element, andwherein the positioning arrangement comprises an alignment pin which is securely seated at its one end in a first drilled hole and at its other end interacts with second drilled holes which are arranged distributed around the sealing element axis. 2. The coaxial valve of claim 1, wherein the sealing element is secured to a sealing element holder which is attached in a releasable fashion to the valve housing. 3. The coaxial valve of claim 2, wherein the sealing element is seated, on a supporting bolt, which bolt is arranged in the seat opening and is secured in a releasable fashion at its one end to the valve housing and is attached at its other end to the sealing element holder. 4. The coaxial valve of claim 1, wherein the sealing element is rotationally symmetrical with respect to the sealing element axis. 5. The coaxial valve of claim 1, wherein each valve seat face is formed on a face of the sealing element selected from the group consisting of a cylindrical face, a spherical face, a cone envelope face, and a planar face. 6. The coaxial valve of claim 1, wherein a valve spring is provided, which prestresses the control tube into one of its first and second axial end positions. 7. The coaxial valve of claim 1, wherein the control device comprises an electromagnet, and the control tube is connected to an armature for the electromagnet. 8. The coaxial valve of claim 1, wherein the control device comprises a piston which is activated via a control medium and to which the control tube is secured in the manner of a piston rod. 9. A coaxial valve, comprising: a valve housing on which an inlet port and at least one outlet port for a medium which is to be conducted through the coaxial valve are provided;a control tube mounted in the valve housing and having a longitudinal direction, said control tube being movable in its longitudinal direction between a first and a second axial end position within the valve housing and interacting with the inlet port and the outlet port in such a way that when the coaxial valve is in the first axial end position medium flows through the control tube;at least one valve seat arranged at the housing and having a valve seat face, the control tube interacting with the valve seat face in its second axial end positions in order to close the coaxial valve; anda control device for moving the control tube between its first and second axial end positions,wherein the valve seat face is formed on a replaceable sealing element which is arranged in a seat opening of the valve housing, said seat opening running essentially transversely with respect to the longitudinal direction,wherein the sealing element is secured to a sealing element holder which is attached in a releasable fashion to the valve housing,wherein at least two valve seat faces are provided on the sealing element, distributed circumferentially around a sealing element axis,wherein at least one positioning arrangement, which secures at least two circumferential orientalions of the sealing element in the valve housing, is provided between the valve housing and the sealing element, andwherein the positioning arrangement comprises an alignment pin which is secural sealed at its one end in a first drilled hole and at its other end interacts with second drilled holes which are arranged distributed around the sealing element axis. 10. A coaxial valve, comprising: a valve housing, on which an inlet port and at least one outlet port for a medium which is to be conducted through the coaxial valve are provided;a control tube which is mounted in the valve housing, said control tube being movable in its longitudinal direction in the valve housing and interacting with the inlet port and the outlet port in such a way that when the coaxial valve is opened medium flows through the control tube;at least one valve seat having a valve seat face, the control tube interacting with the valve seat face in one of its axial end positions in order to close the coaxial valve; anda control device for moving the control tube between its axial end positions,wherein the valve seat face is formed on a replaceable sealing element on which at least two valve seat faces are provided distributed circumferentially around a sealing element axis,wherein at least one positioning arrangement, which secures at least two circumferential orientations of the sealing element in the valve housing, is provided between the valve housing and the sealing element, andwherein the positioning arrangement compromises an alignment pin which is securely seated at its one end in a first drilled hole and at its other end interacts with second drilled holes which are arranged distributed around the sealing element axis. 11. The coaxial valve of claim 10, wherein the sealing element is secured to a sealing element holder which is attached in a releasable fashion to the valve housing. 12. The coaxial valve of claim 11, wherein the sealing element is seated on a supporting bolt, which bolt is arranged in the seat opening and is secured in a releasable fashion at its one end to the valve housing and is attached at its other end to the sealing element holder. 13. The coaxial valve of claim 10, wherein the sealing element is rotationally symmetrical with respect to the sealing element axis. 14. The coaxial valve of claim 10, wherein each valve seat face is formed on a face of the sealing element selected from the group consisting of a cylindrical face, a spherical face, a cone envelope face, and a planar face. 15. The coaxial. valve of claim 10, wherein a valve spring is provided, which prestresses the control tube into one of its axial end positions. 16. The coaxial valve claim 10, Wherein the control device comprises an electromagnet, and the control tube is connected to an armature for the electromagnet. 17. The coaxial valve of claim 10, wherein the control device comprises a piston which is activated via a control medium and to which the control tube is secured in the manner of a piston rod.