Valves and valve actuation – Valve head movably connected for accommodation to seat – With universal connection
Patent
1982-12-27
1984-03-13
Walton, George L.
Valves and valve actuation
Valve head movably connected for accommodation to seat
With universal connection
251 14, 251 636, 251330, F16K 2500, F16K 31143
Patent
active
044362790
ABSTRACT:
A reciprocating gate valve having an adjustable low stress stem connection structure (70) for connecting an operating stem (42) to a gate member (24). The connection structure includes a stem extension (78) formed on the bottom end of the operating stem (42) threadably receiving a collar (84) having an axial bore (86) coaxial with the stem (42) and extending therethrough receiving a gate extension (72) formed on the top end of the gate member (24). The collar (84) has a slot (96) extending generally perpendicular to the axial bore (86) in the direction of fluid flow through the valve. An adjusting nut (106) fits into the slot (96) and threadably engages the gate extension (72). The slot (96) permits movement of the nut (106) and gate member (24) relative to the longitudinal axis of the stem (42) in a direction generally parallel to the direction of fluid flow through to the gate valve. The nut (106) is accessible from the slot (96) for manual axial adjustment of the gate member (24) relative to the stem (42) so that the gate member port (30) can be aligned with the flow passages. The stem extension (78) has an annular shoulder (116) to provide a metal-to-metal seal with the bonnet (36) in the closed position of the gate valve.
REFERENCES:
patent: 3463446 (1969-08-01), Natho
patent: 3466001 (1969-09-01), Nelson
patent: 3913883 (1975-10-01), Irwin
patent: 3958592 (1976-05-01), Wells et al.
patent: 4213480 (1980-07-01), Orum et al.
patent: 4376524 (1983-03-01), Shelton
Bonds James V.
Orum Paul R.
ACF Industries Incorporated
Marnock Marvin J.
Walton George L.
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