公开(公告)号：EP1581843A1

公开(公告)日：2005-10-05

申请号：EP03786171.3

申请日：2003-12-31

申请人： AAF-McQuay Inc.

发明人： ROLL, John, Michael ,  WOODARD, Peter, Michael ,  ELLINGHAM, Andrew, Albert ,  YOUNG, Terence, William, Thomas

IPC分类号： G05D16/18

CPC分类号： G05D16/10 ,  F25B41/04 ,  F25B2500/06 ,  F25B2600/027 ,  F25B2700/1933

摘要： A valve comprises a housing (1) having an inlet (4) and an outlet (5), and a pressure sensing port (8). A piston (6) slides in a part (3) of the housing (1) in response to a difference between a first fluid pressure at the pressure sensing port on the one side of the piston, and a second fluid pressure at the inlet and/or outlet on the other side of the piston (6). A valve member (7) carried by the piston is operable thereby to close the inlet (4) when said second fluid pressure is less than a value sufficiently greater than said first fluid pressure. The valve member (7) is movable with respect to the piston (6) to facilitate closing of the inlet (4), in response to a fluid flow from the housing (1) to the inlet (4), when the piston is not acting to close the inlet.

摘要翻译： 阀包括具有入口（4）和出口（5）以及压力感测端口（8）的壳体（1）。 响应于活塞一侧上的压力感测端口处的第一流体压力与入口处的第二流体压力之间的差异，活塞（6）在壳体（1）的部分（3）中滑动，并且 /或活塞（6）另一侧的出口。 当所述第二流体压力小于比所述第一流体压力足够大的值时，由所述活塞承载的阀构件（7）可操作从而关闭所述入口（4）。 当活塞不是活塞时，响应于从壳体（1）流向入口（4）的流体，阀构件（7）可相对于活塞（6）移动以便于关闭入口（4） 用来关闭入口。

公开(公告)号：EP1581843B1

公开(公告)日：2006-10-11

申请号：EP03786171.3

申请日：2003-12-31

申请人： AAF-McQuay Inc.

发明人： ROLL, John, Michael ,  WOODARD, Peter, Michael ,  ELLINGHAM, Andrew, Albert ,  YOUNG, Terence, William, Thomas

IPC分类号： G05D16/18

CPC分类号： G05D16/10 ,  F25B41/04 ,  F25B2500/06 ,  F25B2600/027 ,  F25B2700/1933

摘要： A valve comprises a housing (1) having an inlet (4) and an outlet (5), and a pressure sensing port (8). A piston (6) slides in a part (3) of the housing (1) in response to a difference between a first fluid pressure at the pressure sensing port on the one side of the piston, and a second fluid pressure at the inlet and/or outlet on the other side of the piston (6). A valve member (7) carried by the piston is operable thereby to close the inlet (4) when said second fluid pressure is less than a value sufficiently greater than said first fluid pressure. The valve member (7) is movable with respect to the piston (6) to facilitate closing of the inlet (4), in response to a fluid flow from the housing (1) to the inlet (4), when the piston is not acting to close the inlet.