Device for sealing a valve

1. A device for sealing a valve, comprising:

a cooling system disposed about an axis and having an annular inside wall and an annular outside wall spaced radially outwardly from the annular inside wall and defining an annular recess radially between the annular inside and annular outside walls;

a sealing ring positioned about the axis and having an annular wall partially received in the annular recess of the cooling system and partially extending outside of the annular recess and positioned adjacent to the annular outside wall of the cooling system, and having a spaced annular lip at least partially received in the annular recess and extending axially and tapering radially inwardly away from the annular wall to a contact point and engaging the annular inside wall;

wherein the sealing ring is positioned at an inlet side and/or an outlet side of a valve housing;

wherein the annular wall of the sealing ring generally has a tubular shape and extends axially from a distal end received in the annular recess to a contact face for sealingly engaging the valve housing; and

the contact face of the annular wall positioned entirely radially inwardly of the distal end of the annular wall and defining an outer shoulder between the contact face and the distal end along a radial outer surface of the annular wall and defining an inner shoulder along a radially inner surface of the annular wall such that a pressure against the outer shoulder biases the inner shoulder against the annular inside wall of the cooling system to seal the annular wall against the cooling system.

2. The device for sealing a valve as claimed in claim 1 , wherein the spaced annular lip extends away from the annular wall at an acute angle.

3. The device for sealing a valve as claimed in claim 1 , wherein the spaced annular lip and the annular wall form a V-shaped or U-shaped structure in cross-section.

4. The device for sealing a valve as claimed in claim 1 , further including a spring, and

wherein the sealing ring is installed together with the spring.

5. The device for sealing a valve as claimed in claim 1 , wherein the contact face of the sealing ring has a cylindrical or spherical shape.

6. The device for sealing a valve as claimed in claim 1 , wherein the annular wall defines the radially outermost portion of the sealing ring.

7. The device for sealing a valve as claimed in claim 1 , further comprising a spring inside the annular recess of the cooling system and engaging the end of the annular wall opposite the contact face and configured to apply an axial biasing force thereto.

8. The device for sealing a valve as claimed in claim 1 , wherein the sealing ring has regions with different internal radii, whereby the sealing ring forms a shoulder.

9. The device for sealing a valve as claimed in claim 8 , wherein the sealing ring is elastically deformable as a result of pressure differences at the shoulder and on the spaced annular lip.

10. A device for sealing a valve comprising:

a cooling system disposed about an axis and having an annular inside wall and an annular outside wall spaced radially outwardly from the annular inside wall and defining an annular recess radially between the annular inside and annular outside walls;

a sealing ring positioned about the axis and having an annular wall at least partially received in the annular recess of the cooling system and positioned adjacent to the annular outside wall of the cooling system and including an annular lip at least partially received in the annular recess and extending axially and tapering radially inwardly away from the annular wall to a contact point and engaging the annular inside wall;

the annular wall of the sealing ring extending axially from a contact face for sealingly engaging a valve housing to a distal end in the annular recess of the cooling system; and

a spring positioned in the annular recess of the cooling system and biasing the distal end of the sealing ring toward the valve housing;

the contact face of the annular wall positioned entirely radially inwardly of the distal end of the annular wall and defining an outer shoulder between the contact face and the distal end along a radial outer surface of the annular wall and defining an inner shoulder along a radially inner surface of the annular wall such that a pressure against the outer shoulder biases the inner shoulder against the annular inside wall of the cooling system to seal the annular wall against the cooling system.

11. The sealing ring for a valve as claimed in claim 10 , further including an annular channel radially between the annular wall and the annular lip for receiving a high-pressure fluid to bias the annular lip outwardly.

12. A device for sealing a valve comprising:

a cooling system disposed about an axis and having an annular inside wall and an annular outside wall spaced radially outwardly from the annular inside wall and defining an annular recess radially between the annular inside and outside walls;

a sealing ring having an annular wall extending axially between a distal end received in the annular recess of the cooling system and a contact face for axially engaging a valve housing;

the sealing ring further including an annular lip extending axially and radially inwardly from the annular wall from a contact point and radially engaging the annular inside wall of the cooling system inside the annular recess;

the sealing ring defining an annular channel between the annular wall and the sealing ring annular lip such that pressure within the annular channel biases the annular lip radially against the annular inside wall of the cooling system and biases the contact face axially against the valve housing;

the contact face of the annular wall positioned entirely radially inwardly of the distal end of the annular wall and defining an outer shoulder between the contact face and the distal end along a radial outer surface of the annular wall and defining an inner shoulder along a radially inner surface of the annular wall such that a pressure against the outer shoulder biases the inner shoulder against the annular inside wall of the cooling system to seal the annular wall against the cooling system.

13. The device for sealing a valve as set forth in claim 12 wherein at least a portion of the contact face of the sealing ring is positioned radially inwardly of the annular lip.

14. The device for sealing a valve as set forth in claim 12 further including a spring positioned inside the annular recess and axially biasing the sealing ring away from the cooling system.

15. The device for sealing a valve as set forth in claim 12 wherein the annular recess terminates axially at a spring supporting wall extending between the annular inside wall and the annular outside wall, and wherein the spring extends axially between the spring supporting wall and the distal end of the annular wall.

16. The device for sealing a valve as set forth in claim 12 wherein the annular wall is radially spaced from the annular outside wall of the cooling system at the distal end of the annular wall to allow fluids to pass between the annular wall and the annular outside wall of the cooling system.