Seat extractor tool for extracting valve seats

Details Seat extractor tool for extracting valve seats Seat extractor tool for extracting valve seats

1975-12-31

1977-05-31

Duzan, James R.

Metal working

Means to assemble or disassemble

Valve applying or removing

29252, 29427, B23P 1904

Patent

active

040260011

ABSTRACT:
A tool for extracting press-fitted seats from annular seat recesses of a gate valve body by insertion within the flow passage from the valve chamber. The tool is generally cylindrical in shape and has a pair of spaced end caps secured to each other with a pair of spaced elastomeric annular seals between the end caps and seal retainers on each side of the elastomeric seals. Pressurized hydraulic fluid is inserted in the tool to urge the elastomeric seals outwardly; one seal being in fluid sealing contact with the seat to be removed and the other seal being in fluid sealing contact with the adjacent flow passage surface. An increase in the fluid pressure of the hydraulic fluid effects a flow of fluid in the recess behind the seat to move the seat out of its recess.

REFERENCES:
patent: 2348293 (1944-05-01), Hamer
patent: 2671262 (1952-03-01), Kuniholm
patent: 2832653 (1958-04-01), Wilson
patent: 2946610 (1960-07-01), Jenness
patent: 3267568 (1966-08-01), Johnson et al.

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