Other

Spx Corporation

Donald M Allen

Charles C Partridge

Drew Shine Weaver

Donald J Wass

A surge relief apparatus for sensing, tracking and responding to pressure changes in a flow system. The apparatus includes a fluid storage tank that is in fluid communication with the flow system. The apparatus also includes a control valve that is connected to the fluid storage tank, wherein the control valve compensates for pressure in response to pressure change in the flow system. The control valve also controls the rate of pipeline pressure rise in the flow system. The surge relief apparatus also includes a hydraulic accumulator in fluid communication with the control valve along with a surge relief valve in fluid communication with the accumulator.

Surge relief apparatus and method

A surge relief apparatus for sensing, tracking and responding to pressure changes in a flow system to prevent damage caused by transient pressure changes in the flow system having one or more conduits with fluid. The surge relief apparatus comprising a transient pressure sensor, a pressure sensor, a regular and a valve. The transient pressure sensor is in communication with an upstream conduit and is responsive only to the fluid in the flow system for sensing transient pressure changes and for generating a first signal continuously proportional to the rate of change of the pressure. The pressure level sensor is in communication with an upstream conduit and is responsive only to the fluid in the flow system for sensing pressure changes in the flow system and for generating a second signal continuously proportional to the pressure level in the system. The regulator is responsive only to the first and second signals from the sensors for producing a discharge signal when either the rate of the transient pressure change is greater than a predetermined value or the pressure level in the system exceeds a preestablished value, the discharge signal for continuously tracking the pressure differentiae in the flow system. The valve receives the discharge signal from the regulator and transfers by-pass fluid from the flow system for relieving the surge of pressure indicated by the rate of the transient pressure change or the pressure level in the system.

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Benicia, CA, United States of America

Donald M Allen