Systems for dispensing multi-component products

1. A pressurized dispensing system for dispensing a multi-component product, comprising:

(a) a first chamber constructed to contain a first component of the product;

(b) a second chamber constructed to contain a second component of the product and maintain the second component separate from the first component;

(c) a dispensing head, in fluid communication with the first and second chambers, through which the product is dispensed; and

(d) a valve assembly comprising a multi-global valve stem having a first lobe defining a first valve portion in communication with the first chamber, and a second lobe defining a second valve portion in communication with the second chamber, and a biasing element configured to move the multi-global valve stem from an open, actuated position, in which the first and second components flow simultaneously from the first and second chambers to the dispensing head, to a closed, normal position in which the first and second chambers are sealed.

2. The dispensing system of claim 1 wherein the biasing element comprises a spring.

3. The dispensing system of claim 2 wherein the valve assembly further comprises a valve body, and the spring and valve stem are contained within the valve body.

4. The dispensing system of claim 3 wherein the valve stem includes a plurality of openings, and the valve assembly further comprises a valve seal configured to seal the openings when the valve stem is in its closed, normal position.

5. The dispensing system of claim 1 further comprising an actuator configured to be actuated by a user to move the valve stem from its closed, normal position to its open, actuated position.

6. The dispensing system of claim 5 wherein the multi-lobal valve stem defines a first fluid passageway between the first chamber and the actuator, and a second fluid passageway between the second chamber and the actuator.

7. The dispensing system of claim 6 wherein the actuator defines first and second fluid passageways configured to maintain the first and second components separate during dispensing, the first and second passageways of the actuator being in respective fluid communication with the first and second passageways of the valve stem.

8. The dispensing system of claim 1 further comprising a canister in which the two chambers are disposed.

9. The dispensing system of claim 1 wherein the canister defines a can opening of approximately 1 inch.

10. The dispensing system of claim 9 wherein the valve assembly is configured to fit within the can opening of the canister.

11. The dispensing system of claim 4 wherein the valve body is configured to inhibit movement of the valve seal when the valve is in use.

12. The dispensing system of claim 1 wherein the first and second chambers comprise portions of a multi-chamber bag.

13. The dispensing system of claim 1 wherein the first and second chambers comprise first and second bags.

14. The dispensing system of claim 12 wherein the bag comprises a foil bag.

15. The dispensing system of claim 13 wherein the bags comprise foil bags.

16. The dispensing system of claim 12 wherein said multi-chamber bag includes a threaded neck.

17. The dispensing system of claim 13 wherein each bag includes a threaded neck.

18. The dispensing system of claim 12 further comprising an adaptor to which the bag can be heat sealed, the adaptor being configured to be mounted on a lower portion of the valve assembly and to provide fluid communication between the valve assembly and the chambers.

19. The dispensing system of claim 13 further comprising an adaptor to which the bag can be heat sealed, the adaptor being configured to be mounted on a lower portion of the valve assembly and to provide fluid communication between the valve assembly and the chambers.