Dielectric fitting for pressure regulator

1. A dielectric fitting for a pressure regulator comprising:

a flange adapted to be disposed next to a housing of the pressure regulator, said flange including a passageway extending axially and at least one fastener through-aperture spaced radially from said passageway and extending axially therethrough;

an isolator plate disposed next to said flange and adapted to be disposed between said flange and the housing, said isolator plate including a planar portion having a central opening extending axially therethrough and at least one fastener through-aperture spaced radially from said central opening and extending axially therethrough, said central opening communicating with said passageway;

an isolator cover disposed next to said flange and said isolator plate to electrically isolate said flange from the housing, said isolator cover including a planar portion to abut said flange and having a central opening extending axially therethrough and coaxial with said central opening of said isolator plate, said planar portion having at least one fastener portion extending axially from said planar portion and disposed in said at least one fastener through-aperture of said flange, said at least one fastener portion having at least one fastener through-aperture extending axially therethrough; and

at least one fastener extending through said at least one fastener through-aperture of said flange, said at least one fastener through-aperture of said isolator cover, and said at least one fastener through-aperture of said isolator plate and adapted to fasten to the housing.

2. A dielectric fitting as set forth in claim 1 wherein said isolator plate is made of a polymeric material.

3. A dielectric fitting as set forth in claim 2 wherein said isolator cover is made of a polymeric material.

4. A dielectric fitting as set forth in claim 3 wherein said flange is made of a metal material.

5. A dielectric fitting as set forth in claim 4 wherein said isolator plate and said isolator cover are formed as individual injection molded polymeric components.

6. A dielectric fitting as set forth in claim 1 wherein said isolator plate includes a ring portion extending axially from an inner periphery of said planar portion and forming said central opening, and an outer flange extending axially from an outer periphery of said planar portion.

7. A dielectric fitting as set forth in claim 6 wherein said flange includes a base portion at one end to matingly engage said ring portion and a fluid connector portion extending axially from said base portion and having a passageway extending axially therethrough for fluid flow, said base including said at least one fastener through-aperture extending axially therethrough.

8. A dielectric fitting as set forth in claim 1 including at least one seal disposed between said isolator plate and said flange.

9. A dielectric fitting for a pressure regulator comprising:

a flange adapted to be disposed next to a housing of the pressure regulator, said flange including at least one fastener through-aperture extending axially therethrough;

an isolator plate disposed next to said flange and adapted to be disposed between said flange and the housing, said isolator plate including a planar portion having at least one fastener through-aperture extending axially therethrough;

an isolator cover disposed next to said flange and said isolator plate to electrically isolate said flange from the housing, said isolator cover including at least one fastener portion disposed in said at least one fastener through-aperture of said flange and having at least one fastener through-aperture extending axially therethrough;

at least one fastener extending through said at least one fastener through-aperture of said flange, said at least one fastener through-aperture of said isolator cover, and said at least one fastener through-aperture of said isolator plate and adapted to fasten to the housing;

wherein said isolator plate includes a ring portion extending axially from an inner periphery of said planar portion, and an outer flange extending axially from an outer periphery of said planar portion;

wherein said flange includes a base portion at one end to matingly engage said ring portion and a fluid connector portion extending axially from said base portion and having a passageway extending axially therethrough for fluid flow, said base including said at least one fastener through-aperture extending axially therethrough;

wherein said isolator cover includes a planar portion to abut said base portion of said flange and said at least one fastener portion extending axially from said planar portion; and

wherein said isolator cover includes an outer flange extending axially from an outer periphery of said planar portion of said isolator cover and disposed about an outer periphery of said base portion of said flange and within said outer flange of said isolator plate, and an inner flange extending axially from an inner periphery of said planar portion of said isolator cover and disposed about an outer periphery of said fluid connector portion of said flange.

10. A dielectric fitting as set forth in claim 1 including at least one reinforcement plate disposed adjacent said isolator cover.

11. A dielectric fitting as set forth in claim 10 wherein said at least one reinforcement plate includes a planar portion and at least one fastener through-aperture extending through said planar portion.

12. A dielectric fitting as set forth in claim 11 wherein said at least one reinforcement plate includes an outer flange extending axially from an outer periphery of said planar portion of said at least one reinforcement plate.

13. A dielectric fitting as set forth in claim 10 wherein said at least one reinforcement plate is made of a metal material.

14. A dielectric fitting for a pressure regulator comprising:

a flange made of a metal material and adapted to be disposed next to a housing of the pressure regulator, said flange including a passageway extending axially and at least one fastener through-aperture spaced radially from said passageway and extending axially therethrough;

an isolator plate made of a polymeric material and coupled to said flange and adapted to be disposed between said flange and the housing, said isolator plate including a planar portion having a central opening extending axially therethrough and at least one fastener through-aperture extending axially therethrough, said central opening communicating with said passageway;

an isolator cover made of a polymeric material and disposed next to said flange and said isolator plate to electrically isolate said flange from the housing, said isolator cover including a planar portion to abut said flange and having a central opening extending axially therethrough and coaxial with said central opening of said isolator plate, said planar portion having at least one fastener portion extending axially from said planar portion and disposed in said at least one fastener through-aperture of said flange, said at least one fastener portion having at least one fastener through-aperture extending axially therethrough;

a reinforcement plate made of a metal material disposed adjacent said isolator cover, said reinforcement plate including at least one fastener through-aperture extending axially therethrough;

at least one seal disposed between said isolator plate and said flange; and

at least one fastener extending through said at least one fastener through-aperture of said reinforcement plate, said at least one fastener through-aperture of said flange, said at least one fastener through-aperture of said isolator cover, and said at least one fastener through-aperture of said isolator plate and adapted to fasten to the housing.

15. A dielectric fitting for a pressure regulator comprising:

a flange made of a metal material and adapted to be disposed next to a housing of the pressure regulator, said flange including a passageway extending axially and at least one fastener through-aperture spaced radially from said passageway and extending axially therethrough;

an isolator plate made of a polymeric material and coupled to said flange and adapted to be disposed between said flange and the housing, said isolator plate including a planar portion having a central opening extending axially therethrough and at least one fastener through-aperture extending axially therethrough, said central opening communicating with said passageway;

an isolator cover made of a polymeric material and disposed next to said flange and said isolator plate to electrically isolate said flange from the housing, said isolator cover including a planar portion to abut said flange and having a central opening extending axially therethrough and coaxial with said central opening of said isolator plate, said planar portion having at least one fastener portion extending axially from said planar portion and disposed in said at least one fastener through-aperture of said flange, said at least one fastener portion having at least one fastener through-aperture extending axially therethrough;

a plurality of reinforcement plates made of a metal material disposed adjacent said isolator cover, said reinforcement plates including at least one fastener through-aperture extending axially therethrough;

at least one seal disposed between said isolator plate and said flange; and

a plurality of fasteners extending through said at least one fastener through-aperture of said reinforcement plates, said at least one fastener through-aperture of said flange, said at least one fastener through-aperture of said isolator cover, and said at least one fastener through-aperture of said isolator plate and adapted to fasten to the housing.

16. A dielectric fitting as set forth in claim 15 wherein each of said reinforcement plates is generally circular in shape and includes a planar portion and said at least one fastener through-aperture extending axially through said planar portion.

17. A dielectric fitting for a pressure regulator comprising:

a flange made of a metal material and adapted to be disposed next to a housing of the pressure regulator, said flange including at least one fastener through-aperture extending axially therethrough;

an isolator plate made of a polymeric material and coupled to said flange and adapted to be disposed between said flange and the housing, said isolator plate including a planar portion having at least one fastener through-aperture extending axially therethrough;

an isolator cover made of a polymeric material and disposed next to said flange and said isolator plate to electrically isolate said flange from the housing, said isolator cover including at least one fastener portion disposed in said at least one fastener through-aperture of said flange and having at least one fastener through-aperture extending axially therethrough;

a plurality of reinforcement plates made of a metal material disposed adjacent said isolator cover, said reinforcement plates including at least one fastener through-aperture extending axially therethrough;

at least one seal disposed between said isolator plate and said flange;

a plurality of fasteners extending through said at least one fastener through-aperture of said reinforcement plates, said at least one fastener through-aperture of said flange, said at least one fastener through-aperture of said isolator cover, and said at least one fastener through-aperture of said isolator plate and adapted to fasten to the housing;

wherein each of said reinforcement plates is generally circular in shape and includes a planar portion and said at least one fastener through-aperture extending axially through said planar portion; and

wherein each of said reinforcement plates include an outer flange extending axially from an outer periphery of said planar portion.

18. A dielectric fitting for a pressure regulator comprising:

a flange made of a metal material and adapted to be disposed next to a housing of the pressure regulator, said flange including at least one fastener through-aperture extending axially therethrough;

an isolator plate made of a polymeric material and coupled to said flange and adapted to be disposed between said flange and the housing, said isolator plate including a planar portion having at least one fastener through-aperture extending axially therethrough;

an isolator cover made of a polymeric material and disposed next to said flange and said isolator plate to electrically isolate said flange from the housing, said isolator cover including at least one fastener portion disposed in said at least one fastener through-aperture of said flange and having at least one fastener through-aperture extending axially therethrough;

a plurality of reinforcement plates made of a metal material disposed adjacent said isolator cover, said reinforcement plates including at least one fastener through-aperture extending axially therethrough;

at least one seal disposed between said isolator plate and said flange;

a plurality of fasteners extending through said at least one fastener through-aperture of said reinforcement plates, said at least one fastener through-aperture of said flange, said at least one fastener through-aperture of said isolator cover, and said at least one fastener through-aperture of said isolator plate and adapted to fasten to the housing; and

wherein each of said reinforcement plates is generally rectangular in shape and includes a planar portion, said at least one fastener through aperture comprising a plurality of fastener through-apertures extending through said planar portion, and a recess extending transversely inward along one side thereof.

19. A dielectric fitting as set forth in claim 18 wherein each of said reinforcement plates include an outer flange extending axially from an outer periphery of said planar portion.

20. A pressure regulator comprising:

a housing having an upper housing portion and a lower housing portion and defining an inlet and an outlet, said housing defining a passageway in communication with one of said inlet and said outlet;

a diaphragm captured between said upper housing portion and said lower housing portion to define upper and lower pressure chambers;

a valve body disposed in said passageway and movable between a plurality of operational positions; and

a dielectric fitting disposed next to a connection portion of said lower housing portion for one of said inlet and said outlet, said dielectric fitting comprising a flange, said flange including a passageway extending axially and at least one fastener through-aperture spaced radially from said passageway and extending axially therethrough, an isolator plate disposed between said flange and the connection portion, said isolator plate including a planar portion having a central opening extending axially therethrough and at least one fastener through-aperture extending axially therethrough, said central opening communicating with said passageway, and an isolator cover disposed next to said flange and said isolator plate to electrically isolate said flange from said lower housing portion, said isolator cover including a planar portion to abut said flange and having a central opening extending axially therethrough and coaxial with said central opening of said isolator plate, said planar portion having at least one fastener portion extending axially from said planar portion and disposed in said at least one fastener through-aperture of said flange, said at least one fastener portion having at least one fastener through-aperture extending axially therethrough; and

at least one fastener extending through said at least one fastener through-aperture of said flange, said at least one fastener through-aperture of said isolator cover, and said at least one fastener through-aperture of said isolator plate and adapted to fasten to the housing and threadably engaging at least one threaded aperture of said lower housing portion.

21. A pressure regulator as set forth in claim 20 wherein said isolator plate is made of a polymeric material.

22. A pressure regulator as set forth in claim 21 wherein said isolator cover is made of a polymeric material.

23. A pressure regulator as set forth in claim 22 wherein said flange is made of a metal material.

24. A pressure regulator as set forth in claim 23 wherein said isolator plate and said isolator cover are formed as individual injection molded polymeric components.

25. A pressure regulator as set forth in claim 20 wherein said dielectric fitting includes at least one reinforcement plate disposed adjacent said isolator cover.

26. A pressure regulator as set forth in claim 20 wherein said dielectric fitting includes a first seal disposed between said flange and said isolator plate and a second seal disposed between said isolator plate and said lower housing portion.