Valves and valve actuation – Reciprocating valve – Gate
Patent
1989-04-18
1990-08-28
Hepperle, Stephen M.
Valves and valve actuation
Reciprocating valve
Gate
277102, 277188A, F16K 302
Patent
active
049519190
ABSTRACT:
The collar of a one piece liner for a gate of a gate valve includes inwardly sloping entry surfaces for urging packing compressed by a packing gland against the gate to effect a seal about the gate without an increase of packing gland pressure. Bead seals disposed upon the inwardly sloping surfaces cooperate with the packing to prevent leakage intermediate the sloping surfaces and the packing. Further bead seals extending about the interior of the throat of the chest bear against the gate to serve a sealing function and to discourage migration of the packing into the throat.
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Carlsen, Jr. Norman H.
Haglund Raymond E.
Hepperle Stephen M.
Leo L. R.
Newcon Company
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