High-pressure valve assembly

1. A high-pressure valve assembly, comprising:

a flange defining an axis;

a valve body projecting into the flange and having a first stepped end section with an outside diameter smaller than an outside diameter of the valve body;

a pressure chamber formed as a blind hole in the first stepped end section of the valve body, said blind hole extending in the direction of the axis;

a static ring seal disposed proximate a transition between the valve body and the stepped end section for sealing the valve body against the flange;

a spring-loaded closure member supported for movement in a direction of the axis on a second end of the valve body opposite the first stepped end section to form a suction valve;

a spring-loaded tappet supported for movement in the pressure chamber in the direction of the axis in opposition to the movement of the spring-loaded closure member; and

a channel formed in the valve body having one end porting into the pressure chamber and connecting the suction valve with the pressure chamber.

2. The valve assembly of claim 1 , wherein the closure member and the tappet are arranged in coaxial disposition.

3. The valve assembly of claim 1 , wherein the valve body has a concentric chamber adjacent to the suction valve, said chamber having a wall surface having at least one region forming an axial guidance for the closure member.

4. The valve assembly of claim 1 , wherein the channel ports into a bottom area of the pressure chamber.

5. The valve assembly of claim 1 , wherein the closure member has a stepped pin which is movably supported in a bore of the valve body for guidance in the direction of the axis.

6. The valve assembly of claim 5 , wherein the stepped pin of the closure member has a shoulder to define a sealing surface which rests against a complementary sealing surface of the valve body, when the closure member assumes a sealing position.

7. The valve assembly of claim 6 , wherein the sealing surface of the shoulder has a conical configuration.

8. The valve assembly of claim 6 , wherein the sealing surface of the shoulder extends perpendicular in relation to an axial extent of the closure member and has a flat configuration.

9. The valve assembly of claim 1 , wherein the pressure chamber has a sidewall which has at least one region to provide an axial guide surface for the tappet.

10. The valve assembly of claim 9 , wherein the tappet has a stepped pin which projects into the pressure chamber and rests upon the guide surface.

11. The valve assembly of claim 10 , wherein the stepped pin of the tappet has a shoulder to define a sealing surface which rests against a complementary sealing surface of the valve body, when the tappet assumes a sealing position.

12. The valve assembly of claim 11 , wherein the sealing surface of the shoulder has a conical configuration.

13. The valve assembly of claim 11 , wherein the sealing surface of the shoulder extends perpendicular in relation to an axial extent of the tappet and has a flat configuration.

14. The valve assembly of claim 11 , wherein the sealing surface of the tappet has an end surface formed with a bevel.

15. The valve assembly of claim 11 , wherein the sealing surface of the tappet is formed by an end surface of the tappet.

16. A high-pressure valve assembly, comprising:

a flange defining an axis;

a valve body projecting into the flange;

a static ring seal sealing the valve body against the flange and having a first stepped end section with an outside diameter smaller than an outside diameter of the valve body; a pressure chamber formed as a blind hole in the first stepped end section of the valve body, said blind hole extending in the direction of the axis;

a spring-loaded closure member supported for movement in a direction of the axis on one side of the valve body to form a suction valve;

a solid spring-loaded tappet supported for movement in the direction of the axis on another side of the valve body in opposition to the one side to form a pressure valve; and

a channel connecting the suction valve with the pressure valve and having one end porting into a pressure chamber of the valve body adjacent to the pressure valve, said pressure chamber sized to extend substantially above a bottom edge of the ring seal.

17. The valve assembly of claim 16 , wherein the valve body has a concentric chamber adjacent to the suction valve, said chamber having a wall surface having at least one region forming an axial guidance for the closure member.

18. The valve assembly of claim 16 , wherein the channel ports into a bottom area of the pressure chamber.

19. The valve assembly of claim 16 , wherein the closure member has a stepped pin which is movably supported in a bore of the valve body for guidance in the direction of the axis.

20. The valve assembly of claim 19 , wherein the stepped pin of the closure member has a shoulder to define a sealing surface which rests against a complementary sealing surface of the valve body, when the closure member assumes a sealing position.

21. The valve assembly of claim 16 , wherein the tappet has a stepped pin which projects into the pressure chamber and rests upon a sidewall of the pressure chamber forming a guide surface.

22. The valve assembly of claim 21 , wherein the stepped pin of the tappet has a shoulder to define a sealing surface which rests against a complementary sealing surface of the valve body, when the tappet assumes a sealing position, with the sealing surface of the shoulder extending perpendicular in relation to an axial extent of the tappet and having a flat configuration.

23. The valve assembly of claim 21 , wherein the stepped pin of the tappet has a shoulder to define a sealing surface which rests against a complementary sealing surface of the valve body, when the tappet assumes a sealing position, with the sealing surface of the tappet being formed by an end surface of the tappet.