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1.发明授权VACUUM-ACTUATED SHEAR VALVE DEVICE, SYSTEM, AND METHOD, PARTICULARLY FOR USE IN SERVICE STATION ENVIRONMENTS 有权真空操作的切断阀装置，系统和方法，特别是用在燃气站区
公开(公告)号：EP1888452B1
公开(公告)日：2009-01-21
申请号：EP06769888.6
申请日：2006-04-26
申请人： Veeder-Root Company
CPC分类号： F16K17/34 , B67D7/3209 , B67D7/3218 , B67D7/78 , Y10T137/1654 , Y10T137/5762 , Y10T137/7897
摘要： A vacuum-actuated shear valve (116) coupled between piping (106,140) from a storage tank and piping internal to a fuel dispenser (10) that automatically opens and closes in response to a vacuum level. A vacuum actuator (186) is provided to control a fuel flow valve inside the shear valve (116) . When a sufficient vacuum level is generated to the vacuum actuator (186) , the actuator keeps the flow path valve inside the shear valve (116) open. When the vacuum is lost, the vacuum actuator (186) releases the flow path valve inside the shear valve, which closes it. The vacuum actuator (186) is coupled to a secondary containment space of a fuel-handling component that is drawn under a vacuum level by a vacuum-generating source to monitor for leaks. Thus, if a leak occurs in the monitored secondarily contained space, the shear valve (116) is automatically closed to prevent the flow of fuel from continuing to be supplied to the source of the leak.
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2.发明公开VACUUM-ACTUATED SHEAR VALVE DEVICE, SYSTEM, AND METHOD, PARTICULARLY FOR USE IN SERVICE STATION ENVIRONMENTS 有权真空操作的切断阀装置，系统和方法，特别是用在燃气站区
公开(公告)号：EP1888452A2
公开(公告)日：2008-02-20
申请号：EP06769888.6
申请日：2006-04-26
申请人： Veeder-Root Company
CPC分类号： F16K17/34 , B67D7/3209 , B67D7/3218 , B67D7/78 , Y10T137/1654 , Y10T137/5762 , Y10T137/7897
摘要： A vacuum-actuated shear valve (116) coupled between piping (106,140) from a storage tank and piping internal to a fuel dispenser (10) that automatically opens and closes in response to a vacuum level. A vacuum actuator (186) is provided to control a fuel flow valve inside the shear valve (116) . When a sufficient vacuum level is generated to the vacuum actuator (186) , the actuator keeps the flow path valve inside the shear valve (116) open. When the vacuum is lost, the vacuum actuator (186) releases the flow path valve inside the shear valve, which closes it. The vacuum actuator (186) is coupled to a secondary containment space of a fuel-handling component that is drawn under a vacuum level by a vacuum-generating source to monitor for leaks. Thus, if a leak occurs in the monitored secondarily contained space, the shear valve (116) is automatically closed to prevent the flow of fuel from continuing to be supplied to the source of the leak.
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