Eccentric rotary plug valve with quick removal trim insert

Claim 1

Eccentric rotary plug valve with quick removal trim insert comprising: a. a tubular housing; b. one inlet and outlet end formed in said housing, said inlet and outlet ends adapted to be coupled to a pipeline; c. a straight cylindrical passage formed in said housing and extending from one end of said housing towards a shoulder near the other end of said housing providing at that point a reduced cross-section, said passage additionally having a slightly enlarged diameter portion near the inlet side; d. a cylindrical insert assembly removably placed within the straight cylindrical passage having a raised diameter portion slidingly engaging the slightly enlarged diameter near the inlet side of said housing and engaging a stop shoulder formed at the terminating end of said enlarged portion of said passage, leaving the remaining length of said insert assembly unrestrained within said straight cylindrical passage of the housing; e. a bore or passage extending throughout the central length of a yoke forming the retaining shell of said insert assembly; f. a seatring guiding closely within one end of the bore of said yoke or housing and having a flanged portion engaging one terminating end of said yoke within the slightly enlarged portion of said straight cylindrical housing passage; g. a shaft located perpendicular to and off-set from the longitudenal axis of said yoke and being retained on either end by the outer walls of said yoke; h. an eccentrically rotating plug tiltingly engaged on said shaft and within the central bore or passage of said yoke by a hub, said plug having a fully or partly spherical head portion suitably connected to the hub, said head portion engaging and cooperating with a bore of said seatring, and wherein the center of said sphere is located essentially along the central axis of said seatring bore; j. means to tiltingly move said valve plug; k. actuating means connected exterior of said housing and cooperating with said means to tiltingly move the valve plug.