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Title: 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 ofmore » 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.« less
Inventors:
;
Issue Date:
OSTI Identifier:
251110
Assignee:
Lockheed Idaho Technologies Co., Idaho Falls, ID (United States) PTO; SCA: 420200; PA: EDB-96:107439; SN: 96001607231
Patent Number(s):
US 5,529,087/A/
Application Number:
PAN: 8-394,567; TRN: 96:015221
Contract Number:
AC07-84ID12435
Resource Relation:
Other Information: PBD: 25 Jun 1996
Research Org:
Westinghouse Idaho Nuclear Co
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; VALVES; REMOTE HANDLING; DESIGN; MAINTENANCE; CONTROL EQUIPMENT; INSTALLATION; POSITIONING; FASTENERS; ALIGNMENT

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