公开(公告)号：EP0648318A4

公开(公告)日：1996-05-15

申请号：EP93916710

申请日：1993-06-23

申请人： KEYSTONE INT

发明人： HIGGINS THOMAS F ,  MCNEELY MICHAEL D

IPC分类号： F16K17/10 ,  F16K17/194 ,  F16K17/196

CPC分类号： F16K17/10 ,  F16K17/194 ,  F16K17/196 ,  Y10T137/0379 ,  Y10T137/7738 ,  Y10T137/7764 ,  Y10T137/7832 ,  Y10T137/86324 ,  Y10T137/8634

摘要： A fluid pressure relief system and method for a pressure vessel or tank (10) having a normal vent (16) with a first pilot operated safety valve (18) and an emergency vent (62) having a second pilot operated safety valve (25). A vapor recovery line (20) is connected to relief valve (18) and collected at a vapor storage container (21). A manway (22) on the pressure vessel (10) (shown in Figure 2) defines the emergency vent (62) and a main valve member (66) has a counterweight (74) thereon to urge main valve member (66) to a seated closed position on nozzle (60). The first pilot operated safety valve (18) for the normal vent (16) (is shown in Figure 7) and has a T-shaped body (142) with a main relief valve member (172) at one end of the body (142) mounted for movement in a generally horizontal direction and controlled by a diaphragm (176) at an opposite end of the body (142).