SLEEVED PLUG VALVE

• US 3,614,060 A
• Filed: 07/22/1969
• Issued: 10/19/1971
• Est. Priority Date: 07/22/1969
• Status: Expired due to Term

• Current Assignee: Donald R. Disbrow, Jacob B. Freed
• Original Assignee: Donald R. Disbrow, Jacob B. Freed
• Inventors: Disbrow, Donald R., Freed, Jacob B.
• Primary Examiner(s): Nelson, M. Cary
• Assistant Examiner(s): Sturm, Michael O.
• Application Number:
  US04/843,563
• Time in Patent Office: 819 Days
• Field of Search: 251/317,312,309
• US Class Current: 251/317
• CPC Class Codes: F16K 5/0264 in the housing

Abstract

A sleeved plug valve having flow-throttling lug members at the ports in the valve body, such lug members constituting raised, islandlike projections from the walls of the valve chamber located immediately adjacent the side edge of the ports in the direction of throttling or closing plug movement, such lug members extending circumferentially of their respective ports only along such side edge and having a length which is only a minor portion of the total port circumference, and such lug members having a minimum width at their widest point which is a function of the maximum port dimension of the valve.

Claims

1. In a plug valve, of the type having a valve body with an elongated generally cylindrical interior chamber defined by walls having at least two port openings therein communicating with said chamber, having an elongated plug member with a through port movably disposed within said chamber to control flow therethrough between predetermined such port openings, and having an elongated generally sleevelike liner means seating said plug within said chamber and defining openings disposed generally in registry with said port openings, the improvement comprising:

a lug member located adjacent at least one of said port openings, in lateral alignment with at least a portion of said plug port and at the side of such port opening toward which the plug is movable to close the valve, said lug member comprising an islandlike projection from and integral with said chamber wall into said chamber and generally toward the central area thereof;

said lug member having a length dimension in a direction circumferentially of such port opening which is only a minor portion of the total circumference of such opening;

said lug member having a side edge which defines its width and which is spaced from said port opening side in said direction of plug movement; and

the said liner member opening which is in general registry with such port opening having an edge extremity lying in juxtaposition to and in flanking relation with such lug member side edge and wherein said lug member has a width at its widest point which is at least on the order of one-eighth its said length.

2. The improvement in a plug vaLve defined in claim 1, wherein said lug member has an end surface spaced inwardly of said chamber with respect to portions of the walls thereof which has a configuration that is substantially continuously complementary to the outer peripheral surface of said plug member in the area of said plug port.

3. The improvement in a plug valve defined in claim 1, wherein said lug member has a second side edge which is substantially flush with the said side of the said port opening to which said lug member is adjacent, said flush lug member side edge comprising in effect an extension into said chamber of said port opening side.

4. The improvement in a plug valve defined in claim 1, wherein said chamber wall defines a groovelike recess extending generally between opposite ends of said lug member around remaining portions of the periphery of the said port opening to which said lug is adjacent.

5. The improvement in a plug valve defined in claim 5, wherein said recess is generally contiguous to the peripheral edge of said port opening.

6. The improvement in a plug valve defined in claim 5, wherein said chamber walls further define a ridgelike portion effectively protruding into said chamber with respect to said groovelike recess and located adjacent the latter, said ridgelike portion extending circumferentially around substantially the entire excursion of said recess.

7. The improvement in a plug valve defined in claim 6, wherein said recess extends between said lug member side edge and said ridgelike portion.

8. The improvement in a plug valve defined in claim 1, wherein said liner means further defines at least one secondary opening therethrough located between said liner openings which are in registry with said port openings, said secondary openings being located in lateral alignment with said plug port and in registry with a position occupied by said plug port when the plug is moved within the chamber.

9. The improvement in a plug valve defined in claim 1, including a plural number of said lug members, each such lug member disposed adjacent a corresponding side of different ones of said port openings.

10. The improvement in a plug valve defined in claim 9, including a pair of said lug members at certain of said port openings, each lug member in each such pair being disposed on the opposite lateral side of such port opening from the other lug member in the pair at that opening.

11. In a lines plug valve, having an elongated plug movable seated in a valve chamber and having a liner disposed generally between the plug and the walls of the chamber, said plug controlling flow between at least a pair of ports leading into and out of each chamber by selective positioning of a passage in said plug with respect to such ports, the improvement comprising:

a flow-throttling lug disposed laterally adjacent at least one of said ports and extending generally circumferentially along at least a portion of the peripheral edge thereof;

said lug projecting away from and integral with portions of said chamber walls generally around such port and extending toward the interior of said chamber a sufficient extent to form a narrow open space between the inner end extremity of the lug directly adjacent the outer surface periphery of said plug, and said inner end of said lug having a shape generally complementary to the outside of said plug, such that the plug sweeps across the lug end extremity when moved in a flow-stopping direction to throttle flow directly between the lug and the plug; and

said lug having a width dimension in such direction of plug movement which is at least on the order of one-sixteenth the major diametral dimension of the port to which the lug is adjacent.

12. The improvement in a plug valve according to claim 12, wherein said throttling lug has a length along the circumference of said port which is only a minor portion of the entire such circumference.

13. The improvement in a plug valve defined in claim 12, wherein said lug member has a width at its wiDest point which is at least on the order of one-eighth its said length.

14. The improvement in a plug valve defined in claim 12, wherein said valve chamber walls define a groove extending at least partially around such port generally between opposite end portions of said lug, and wherein said liner forms a ridge seating in such groove.

15. The improvement in a plug valve defined in claim 14, wherein said groove and liner ridge are generally annular and encircle a major portion of said port.

16. The improvement in a plug valve defined in claim 14, wherein said chamber walls further define a ridge extending generally around said groove and disposed radially outwardly thereof with respect to said port, and wherein said liner forms a groove seating over such ridge.

17. In a lined plug valve, of the type having a plug movably seated in a valve chamber by a liner disposed generally between the plug and the walls of the chamber, to control flow between at least a pair of ports leading into and out of such chamber by selective positioning of a passage in said plug with respect to such ports, the improvement comprising:

a flow-throttling lug disposed laterally adjacent at least one of said ports and extending generally circumferentially along at least a portion of the periphery thereof;

said lug projecting away from portions of said chamber walls generally around such port and toward the interior of said chamber;

said lug having an inner end extremity which is closely spaced from the periphery of said plug, such that the plug sweeps across the lug and extremity when moved in a flow-stopping direction to throttle flow therebetween; and

said lug having a minimum width dimension in the direction of closing movement of said plug which is expressed as a ratio with respect to the major port diameter dimension of the valve, at least on the order of 2;

32 for major port diameter dimensions in the range of 1 1/2 inches to 4 inches, 1.8;

32 for major port diameter dimensions in the range of 6 inches to 8 inches, and 1.2;

32 for major port diameter dimensions in the range of 10 inches to 12 inches.