Composite polyethylene and transition valve

Details Composite polyethylene and transition valve Composite polyethylene and transition valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 5/06 (2006.01) B23P 15/00 (2006.01) F16K 27/06 (2006.01) F16L 47/24 (2006.01)

Patent

CA 2152027

A valve body pressure formed from pipe components includes an annular portion for receiving a ball closure member. A pair of conduit portions are connected to the annular portion and the ball. A stem housing for rotatably supporting a valve stem extends up from the annular portion. The stem housing, annular portion, and conduit portions are welded to form the unitary valve body. The conduit portions are integrally connected to end fittings adaptable to connect identical or different grades of polyethylene pipe or metal pipe to polyethylene pipe. The internal surface of the conduit portion includes gripping teeth and O-ring seals that frictionally and sealingly engage the surface of the polyethylene end fitting. The valve can include a metal end fitting and a polyethylene end fitting. The polyethylene end fitting is connected by butt fusion or electrofusion coupling to polyethylene conduit, generally 6 inches in diameter or larger for use in a natural gas distribution system. The metal valve body is wrapped with a fiberglass winding coated with epoxy for corrosion resistance and electrical isolation.

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