公开(公告)号：US3565099A

公开(公告)日：1971-02-23

申请号：US3565099D

申请日：1970-01-02

申请人： JOHN M YOUNG

发明人： HUBER OSCAR R

IPC分类号： F16K5/04 ,  F16K15/03

CPC分类号： F16K15/03 ,  F16K5/0407 ,  Y10T137/5153 ,  Y10T137/7903

摘要： A reversible check valve wherein a valve body defines a pair of end passageways and a central chamber communicating with the latter, the chamber having a rotatable valve plug mounted therein, the plug being made with a port for conveying fluid from one end passageway to the other in either direction. The plug has a seat in its port, and a swingable check valve flap coacts with the seat when the former is seated on the latter to prevent flow of fluid in one direction, while permitting reverse flow of the fluid upon unseating of the flap. The direction of flow is determined by the selective setting of the plug in either of two positions. Moreover, a counterweight is provided on the flap and is arranged to increase the surface area against which the back fluid pressure will act in urging the flap into closed position, the counterweight further preventing chattering of the flap and disposed to urge the flap closed by gravity.