Expanding gate valve having mechanically secured seats

Details Expanding gate valve having mechanically secured seats Expanding gate valve having mechanically secured seats

1979-06-04

1981-03-31

Weakley, Harold W.

Fluid handling

With repair, tapping, assembly, or disassembly means

With disassembly tool engaging feature

251167, 251328, 251363, F16K 4300

Patent

active

042587433

ABSTRACT:
An expanding gate valve having seats (74) which are mechanically secured in place. The valve body has seat pockets which include undercut grooves (78) intersected by a cylindrical body cavity (24) to form a pair of openings (80) to each groove. Each valve seat has a pair of lugs (90) which may be fitted through the openings and into the undercut groove. Subsequent rotation of the seat locks the lugs in the groove to secure the seat in place in its seat pocket. Each seat is able to pivot about an axis extending between the lugs in order to compensate for irregularities in the contact surfaces of the gate or seat.

REFERENCES:
patent: 494579 (1893-04-01), Lunken
patent: 683695 (1901-10-01), Lundbom
patent: 1189086 (1916-06-01), Freeman
patent: 2502689 (1950-04-01), Yant
patent: 4059250 (1977-11-01), Guldener

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