Title: Oval shaped valve with balancing pilot piston

Abstract: A valve is disclosed wherein a valve member is disposed in the chamber of a valve body in such a way that the valve member is axially displaceable so as to open or close the valve, and a pilot cylinder is provided in order to encounter the unbalanced force acting on the valve member due to the difference in pressure between the primary and secondary sides of the valve. When the valve is wide opened, the liquid flows at the same speed, and the pressure loss is reduced to such an extent as almost equal to the pressure loss of a gate valve in wide opened position.

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Inventors: Goga, Atsushi (Kawasaki, JP)
Ikui, Takefumi (Fukuoka, JP)
Obi, Mikio (Tokyo, JP)
Kameda, Shinya (Tokyo, JP)

Application Number: 708114
Filing Date: 1976-07-23
Publication_date: 1979-02-27
Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha (Ote, JP)
Primary Class(es): 251/58 137/219, 251/282
Other Classes:
US Patent Ref:

932028	Aug, 1909	Koenig	137/219.
2592474	Apr, 1952	Schnyder	137/219.
3032056	May, 1962	Riley et al.	251/282.
3036587	May, 1962	Silver	137/219.

Other Refs:
Primary Examiner: Rosenthal, Arnold
Assistant Examiner:
Attorney: Scrivener Parker Scrivener & Clarke