Half profile gate valve

Details Half profile gate valve Half profile gate valve

1997-07-14

1999-03-23

Chambers, A. Michael

Valves and valve actuation

Hermetic flexible wall seal for actuator

Bellows

251 62, 251204, F16K 3100

Patent

active

058848991

ABSTRACT:
A gate valve (110) includes a valve housing (112), valve plate (130), and linkage assembly (134, 136, 140). An actuator assembly (124) includes a cylinder component (150) and a piston component (170). Piston component (170) includes a piston rod (174) that has a downwardly extending annular collar (187) and cylinder component (150) includes an end wall (156) with an upstanding annular collar (160), which slidingly mates with collar (187). A bellows shield (192) is flexibly mounted between the piston rod and the cylinder end wall to isolate the valve chamber of housing (112) from the sliding interfit of the piston and cylinder components. Piston component (170) also includes an annular groove (198) for receiving the annular collar (160). Wear rings (191, 193) are provided between piston component (170) and cylinder component (150).

REFERENCES:
patent: 3038692 (1962-06-01), Holmes
patent: 3086745 (1963-04-01), Natho
patent: 4431159 (1984-02-01), Stubbs
patent: 5626324 (1997-05-01), Nakamura et al.
Brochure for "High Vacuum Apparatus: New Design Million Cycle Valves," High Vacuum Apparatus Manufacturing, Incorporated, Hayward: California.

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