System for remotely servicing a top loading captive ball valve
An attachment for facilitating servicing of a valve is disclosed including: an assembly composed of a valve seat defining a flow path, a flow control member movable relative to the valve seat for blocking or unblocking the valve seat, and a control device including a stem coupled to the flow control member and operable for moving the flow control member relative to the valve seat; a housing for receiving the assembly, the housing having an opening via which the assembly can be removed from, and installed in, the housing, and the housing having a plurality of threaded studs which surround the opening and project away from the housing; a valve housing cover for closing and sealing the opening in the housing, the cover having a first bore for passage of the stem of the control device when the assembly is installed in the housing and a plurality of second bores each located for passage of a respective stud when the cover closes the opening in the housing. A plurality of threaded nuts are engageable with the studs for securing the cover to the housing when the cover closes the opening in the housing, wherein the attachment comprises: a plurality of nut guide devices removable from the housing and each operatively associated with a respective stud for retaining a respective nut and guiding the respective nut into alignment with the respective stud to enable the respective nut to be rotated into engagement with the respective stud; and aligning the nut guide devices with the studs. 7 figs.
- Research Organization:
- Westinghouse Idaho Nuclear Co
- DOE Contract Number:
- AC07-84ID12435
- Assignee:
- Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)
- Patent Number(s):
- US 5,529,087/A/
- Application Number:
- PAN: 8-394,567; TRN: 96:015221
- OSTI ID:
- 251110
- Resource Relation:
- Other Information: PBD: 25 Jun 1996
- Country of Publication:
- United States
- Language:
- English
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