Multi-mode injection valve

1. An injection valve, comprising:

a stator having an outer stator face and an inner stator face;

a plurality of fluid ports in the outer stator face;

a plurality of circular fluid orifices in the inner stator face, the fluid orifices disposed in fluid communication with the fluid ports, respectively, a pair of the plurality of fluid orifices lie along an inner radius concentric with the stator;

a rotor having a rotor surface engaging the inner stator face of the stator;

a plurality of rotor grooves in the rotor surface of the rotor, each of the rotor grooves adapted for fluid communication with a pair of the fluid orifices depending upon a rotational or angular position of the rotor with respect to the stator; and

an actuator unit engaging the rotor, the actuator unit adapted to rotate the rotor relative to the stator; and

elongated and discrete first, second, third and fourth stator face grooves in the inner stator face of the stator and communicating with a plurality of the fluid orifices, respectively, the first and fourth stator face grooves extending in a radial orientation beginning on the inner radius and extending outwardly to an outer radius and the second and third stator face grooves lying in a circumferential orientation on the outer radius between the first and fourth stator face grooves.

2. The injection valve of claim 1 wherein the rotor surface of the rotor is spring-loaded against the inner stator face of the stator.

3. The injection valve of claim 1 wherein the plurality of fluid ports comprises eight fluid ports and the plurality of fluid orifices comprises eight fluid orifices.

4. The injection valve of claim 1 further comprising a sample loop establishing fluid communication between a first one of the plurality of fluid ports and a second one of the plurality of fluid ports.

5. The injection valve of claim 1 further comprising a rotary shaft drivingly engaged by the actuator unit and drivingly engaging the rotor for rotation.

6. An injection valve, comprising:

a stator having an outer stator face and an inner stator face;

a plurality of fluid ports in the outer stator face;

a plurality of circular fluid orifices in the inner stator face, the fluid orifices disposed in fluid communication with the fluid ports, respectively, a pair of the plurality of fluid orifices lie along an inner radius concentric with the stator;

elongated and discrete first, second, third and fourth stator face grooves in the inner stator face and disposed in fluid communication with a plurality of the fluid orifices, respectively, the first and fourth stator face grooves extending in a radial orientation and terminating on the inner radius and an outer radius, respectively, concentric with the stator and the second and third stator face grooves extending in a circumferential orientation along the outer radius between the first and fourth stator face grooves;

a rotor having a rotor surface engaging the inner stator face of the stator;

a plurality of rotor grooves in the rotor surface of the rotor, the rotor grooves adapted for direct fluid communication with a pair of the fluid orifices and indirect fluid communication with a pair of the fluid orifices through one of the stator face grooves depending upon a rotational or angular position of the rotor with respect to the stator; and

an actuator unit engaging the rotor, the actuator unit adapted to rotate the rotor relative to the stator.

7. The injection valve of claim 6 wherein the rotor surface of the rotor is spring-loaded against the inner stator face of the stator.

8. The injection valve of claim 6 wherein the plurality of fluid ports comprises eight fluid ports and the plurality of fluid orifices comprises eight fluid orifices.

9. The injection valve of claim 6 further comprising a sample loop establishing fluid communication between a first one of the plurality of fluid ports and a second one of the plurality of fluid ports.

10. The injection valve of claim 6 further comprising a rotary shaft drivingly engaged by the actuator unit and drivingly engaging the rotor for rotation.

11. The injection valve of claim 10 further comprising an encoder unit carried by the rotary shaft.

12. An injection valve, comprising:

a stator having an outer stator face and an inner stator face;

a plurality of fluid ports in the outer stator face;

a plurality of circular fluid orifices in the inner stator face, the fluid orifices disposed in fluid communication with the fluid ports, respectively, a pair of the plurality of fluid orifices lie along an inner radius concentric with the stator;

elongated and discrete first, second, third and fourth stator face grooves in the inner stator face and disposed in fluid communication with a plurality of the fluid orifices, respectively, the first and fourth stator face grooves extending in a radial orientation and terminating on the inner radius and an outer radius, respectively, concentric with the stator and the second and third stator face grooves extending in a circumferential orientation along the outer radius between the first and fourth stator face grooves;

a rotor having a rotor surface engaging the inner stator face of the stator;

a plurality of rotor grooves in the rotor surface of the rotor, the rotor grooves adapted for direct fluid communication with a pair of the fluid orifices and indirect fluid communication with a pair of the fluid orifices through one of the stator face grooves depending upon a rotational or angular position of the rotor with respect to the stator, a first plurality of the rotor grooves extending in a circumferential orientation along the outer radius and a second plurality of the rotor grooves extending in a radial orientation; and

an actuator unit engaging the rotor, the actuator unit adapted to rotate the rotor relative to the stator.

13. The injection valve of claim 12 wherein the rotor surface of the rotor is spring-loaded against the inner stator face of the stator.

14. The injection valve of claim 12 wherein the plurality of fluid ports comprises eight fluid ports and the plurality of fluid orifices comprises eight fluid orifices.

15. The injection valve of claim 12 further comprising a sample loop establishing fluid communication between a first one of the plurality of fluid ports and a second one of the plurality of fluid ports.

16. The injection valve of claim 12 further comprising a rotary shaft drivingly engaged by the actuator unit and drivingly engaging the rotor for rotation.

17. The injection valve of claim 16 further comprising an encoder unit carried by the rotary shaft.