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| Wall anchor |
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| Bogie |
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| Quick disconnect system for construction equipment with rotatable upper works |
| A quick disconnect system for a piece of construction equipment with an upper works rotatably ... |
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| Insulating cover |
| With the foregoing background in mind, it is an object of the present invention to provide a rigid ... |
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| Swing lock mechanism |
| The present invention provides a swing lock mechanism for machines having an upper works rotatably ... |
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| Railway car with composite box structure formed from molded components |
| In accordance with the present invention, disadvantages and problems associated with previous ... |
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| Adjustable wall mounted bracket |
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| Mounting bracket |
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| Sideboard bracket |
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Packing box arrangement for a gate valve
| Details |
Inventors: Kimpel, Alvin A.;
Assignee: Weir Slurry Group, Inc. (Madison, WI)
Primary Examiner: Hirsch; Paul J.
Assistant Examiner:
Attorney, Agent or Firm: Morriss O'Bryant Compagni, P.C.
A packing system for a gate valve is disclosed which includes a sealing member structured to be positioned between a compression member and packing material housed in a cavity formed in the upper edge of a valve housing to provide even and consistent pressure of the packing material against the gate of the valve, thereby preventing leakage from about the gate of the valve. The packing may also include a gasket between the compression member and sealing member to provide additional sealing assurance. |
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DETAILED DESCRIPTION OF THE INVENTION The packing system 20 of the present invention, shown in FIG.
1, generally comprises a sealing member 22 which is configured and positioned to apply even and consistent pressure to an amount of packing material 24 in contact with the gate plate 26 of a gate valve, generally at 28.
The sealing member 22 achieves even and consistent pressure on the packing material 24 by, in turn, being compressed by means of a compression member, or gland follower 30.
More specifically, FIG.
1 shows the upper portion of an exemplar gate valve 28, which generally comprises a first valve body half 34 and a second valve body half 36, the combination of which form a valve housing 38.
FIGS.
2-4 more clearly illustrate the features of an exemplar valve housing 38.
FIG.
2 illustrates, by way of example, the second valve body half 36 of the valve housing 38, viewed from within the valve housing 38 (i.
e.
, with the first valve body half removed).
Each valve body half 36 of the valve housing 38 is configured with opposing long sides 40, 42, a bottom edge 44 and a top edge 46.
Each valve body half 36 of the valve housing 38 is structured with an opening 48 that accommodates an elastomer valve sleeve (not shown).
It should be noted that FIG.
2 does not illustrate further structures of the valve housing, such as the valve sleeves which are known in the art to surround the opening 48 and provide a primary seal between the gate and opening 48 when the gate is in the closed positioned occluding the opening 48, and it is the internal diameter of the valve sleeves which determine the finished diameter 50 of the opening 48 in the valve housing 38.
Each valve body half 36 of the valve housing 38 is also constructed with an elongated gate recess 52 which is formed parallel to the plane of the valve body half 36 and extends from the top edge 46 to near the bottom edge 44 of each valve body half 36 of the valve housing 38.
Thus, when the first valve body half 34 and second valve body half 36 are positioned adjacent each other, as shown in FIG
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