Replaceable outlet on a cylinder valve

1. A valve assembly comprising:

a valve body having an internal passage, an outlet landing, and a vessel coupling;

said valve body passage extending between said outlet landing and said vessel coupling;

a valve member structured to move between an open position, wherein said valve member does not block a fluid from flowing through said internal passage, and a closed position, wherein said valve member blocks a fluid from flowing through said internal passage;

an actuating device coupled to said valve body and structured to move said valve member;

said outlet landing including a generally flat surface and a collar, said collar encircling said flat surface, said collar further having a threaded surface;

an outlet adapter having a retaining ring and an elongated body with an internal passage, said body having a valve engaging portion and an outlet end;

said retaining ring having threads, said external threads structured to engage said collar threaded surface;

an anti-rotation device having a first component on said outlet adapter body and a second component on said valve body;

wherein said outlet adaptor body outlet end is sized to extend through said retaining ring; and

wherein said outlet adaptor is coupled to said outlet landing with said valve engaging portion facing said surface, said retaining ring disposed about said outlet end, and said retaining ring coupled to said collar, said anti-rotation device structured to prevent said outlet adapter rotating as said outlet adapter is installed.

2. The valve assembly of claim 1 wherein:

said anti-rotation device first component includes a pair of pins extending from said outlet adapter body;

said anti-rotation device second component includes a pair of pin openings in said landing surface; and

wherein said pins are positioned to extend into said pair of pin openings when said outlet adapter body is disposed within said collar.

3. The valve assembly of claim 2 wherein said retaining ring includes an inwardly extending flange structured to engage said outlet adapter body valve engaging portion.

4. The valve assembly of claim 2 wherein said outlet adapter body outlet end is generally cylindrical.

5. The valve assembly of claim 2 wherein said outlet adapter includes a gasket, said gasket having a torus shaped body structured to be disposed about said outlet adaptor internal passage and between said adaptor body valve engaging portion and said landing flat surface.

6. The valve assembly of claim 5 wherein said outlet adapter body includes a recess structured to capture said gasket.

7. The valve assembly of claim 5 wherein flat surface includes a ridge encircling said valve body internal passage at said landing surface, said ridge structured to engage said gasket.

8. The valve assembly of claim 1 wherein:

said anti-rotation device first component having an adaptor body valve engaging portion having a non-cylindrical cross-sectional shape; and

said anti-rotation device second component includes a cavity in said landing surface, said cavity having a non-cylindrical cross-sectional shape corresponding to said anti-rotation device first component.

9. The valve assembly of claim 8 wherein said retaining ring includes an inwardly extending flange structured to engage said outlet adapter body valve engaging portion.

10. The valve assembly of claim 8 wherein said outlet adapter body outlet end is generally cylindrical.

11. The valve assembly of claim 8 wherein said outlet adapter includes a gasket, said gasket having a torus shaped body structured to be disposed about said outlet adaptor internal passage and between said adaptor body valve engaging portion and said landing flat surface.

12. The valve assembly of claim 11 wherein said outlet adapter body includes a recess structured to capture said gasket.

13. The valve assembly of claim 11 wherein landing flat surface includes a ridge encircling said valve body passage at said landing surface, said ridge structured to engage said gasket.

14. The valve assembly of claim 8 wherein said anti-rotation device first component is said the entire adaptor body valve engaging portion.

15. The valve assembly of claim 8 wherein said anti-rotation device first component is an extension protruding axially from the adaptor assembly body valve engaging portion.

16. The valve assembly of claim 1 wherein said retaining ring includes a locking device structured to substantially prevent rotation of the retaining ring.

17. The valve assembly of claim 16 wherein:

said adaptor body includes a set screw opening; and

said locking device is a set screw.