Wafer-type direct-acting valve

Details Wafer-type direct-acting valve Wafer-type direct-acting valve

2006-11-22

2010-10-05

Hepperle, Stephen (Department: 3753)

Fluid handling

Removable valve head and seat unit

C137S505410

Reexamination Certificate

active

07806136

ABSTRACT:
In the direct-acting valve of the present invention, no flange is formed in the valve box and the piping is achieved by interposing the valve box between pipe flanges. The direct acting valve includes: a driving section that operates by sensing a primary pressure or a secondary pressure; and a valve body communicating with the driving section to open and close a flow path. A valve box of the valve is positioned between pipe flanges tightened by bolts and nuts. Connecting end portions to be mated with pipe flanges respectively have an inlet and an outlet of the flow path, and each of the end portions is formed to have a smaller diameter than that of the pipe flange. A cover flange neck is extended upward from the valve box is formed so as to be interposed between the bolts B and B1which are provided between the pipe flanges and adjacent to each other on the circumference of the pipe flanges.

REFERENCES:
patent: 508133 (1893-11-01), Gold
patent: 3001550 (1961-09-01), Engel
patent: 3218024 (1965-11-01), Kroekel
patent: 3338140 (1967-08-01), Sheesley
patent: 3346005 (1967-10-01), Hanssen
patent: 3451431 (1969-06-01), Royer
patent: 3521666 (1970-07-01), Scaramucci
patent: 3627258 (1971-12-01), Scaramucci
patent: 3672632 (1972-06-01), Chow
patent: 4471799 (1984-09-01), Buck
patent: 2008/0078967 (2008-04-01), Ochiai et al.
patent: 6-37446 (1994-09-01), None
Japanese Industrial Standards Committee, “Glossary of Terms for Valves JIS B 0100-1984”, Japanese Standards Association, First edition on Feb. 28, 1985, p. 37, No. 10307, p. 38, No. 10705 (4 pages).

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