F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 55/46 (2006.01)
Patent
CA 2161396
A pig injector has a valve assembly having a pair of valve seats. A valve ball having a bore is disposed within the valve assembly and seated on the valve seats. A journalled stem mounted in a stuffing box is provided to rotate the valve ball within the valve assembly between a position in which the bore is aligned along the pipe and a position in which the bore is aligned across the pipe. A side entry cap is disposed in the valve assembly in alignment with the bore of the valve ball when the bore is aligned across the pipe. The side entry cap includes a threaded portion and a sealing portion, the threaded portion being cylindrical and the sealing portion having an exterior surface forming a conical section increasing in diameter with increasing distance from the bore of the valve ball. The valve assembly has a corresponding conical seat portion for receiving the conical section of the side entry cap in sealing relationship. An annular groove is formed in one of the conical section of the sealing portion and the conical seat portion of the valve assembly, the annular groove being defined by walls extending inward from the respective one of the conical section of the sealing portion and the conical seat portion of the valve assembly. An annular sealing element is disposed within the annular groove.
Argus Machine Co. Ltd.
Lambert Anthony R.
LandOfFree
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