Patent ID: 7284563
Filing Date: 2007-10-23
Classification: F17D,Y10T

Abstract:
1. A surge relief apparatus for sensing and responding to pressure changes in a flow system and/or rate of pressure change in a flow system, comprising a hydraulic circuit in which fluid flows, wherein said hydraulic circuit comprises: a control valve that is in fluid communication with the flow system, wherein said control valve compensates for pressure in response to pressure change in the flow system and controls rate of pipeline pressure rise in the flow system; a first hydraulic circuit accumulator in fluid communication with said control valve; a first surge relief valve in fluid communication with said first hydraulic circuit accumulator; a second hydraulic circuit accumulator in fluid communication to with said control valve; a third hydraulic circuit accumulator in fluid communication to with said control valve; a fourth hydraulic circuit accumulator in fluid communication to with said control valve; a second surge relief valve in fluid communication with said second hydraulic circuit accumulator; a third surge relief valve in fluid communication with said third hydraulic circuit accumulator; and a fourth surge relief valve in fluid communication with said fourth hydraulic circuit accumulator.