Abstract: Example aspects of a sliding disc assembly for a dual spring valve, and a method of operating a dual spring valve are disclosed. The sliding disc assembly can comprise a shaft defining a first end and a second end; a disc mounted on the shaft between the first end and the second end, the disc defining an upper disc surface, a lower disc surface, and an annular base surface; a first spring mounted on the shaft between the lower disc surface and the first end of the shaft; and a second spring mounted on the shaft between the upper disc surface and the second end of the shaft, wherein the first spring defines a spring force that is different from a spring force of the second spring.

Abstract: Systems and methods that offer significant improvements to current content processing management systems for heterogeneous and widely distributed content sources are disclosed. The proposed systems and methods are configured to provide a framework and libraries of extensible components that together are designed enable creation of solutions to acquire data from one or more content repositories, possibly distributed around the world across a wide range of operating systems and hardware, process said content, and publish the resulting processed information to a search engine or other target application. The proposed embodiments offer an improved architecture that incorporates manager nodes and worker (processing) nodes, where worker nodes are configured to scan and process data, while manager nodes are configured to handle all allocation of work (including throttling) and control state and failover. Such an arrangement enables the system to perform with greater scalability and reliability.

Abstract: Example aspects of a sliding disc assembly for a dual spring valve, a dual spring valve, and a method of operating a dual spring valve are disclosed. The sliding disc assembly can comprise a shaft defining a first end and a second end; a disc mounted on the shaft between the first end and the second end, the disc defining an upper disc surface, a lower disc surface, and an annular base surface; a first spring mounted on the shaft between the lower disc surface and the first end of the shaft; and a second spring mounted on the shaft between the upper disc surface and the second end of the shaft, wherein the first spring defines a spring force that is different from a spring force of the second spring.

Abstract: A valve includes an annular body defining a body bore. An annular valve seat is positioned in the body bore and an annular groove is defined in a portion of the annular sealing surface. A rotatable valve element is positioned in the body bore. With the valve element in a closed and an unpressurized condition, the annular groove is deformed and a first groove gap is defined in the annular groove adjacent to the first disc face and a second groove gap is defined in the annular groove adjacent to the second disc face. With the valve element closed and in a pressurized condition, the annular groove is deformed and a third groove gap is defined in the annular groove adjacent to the first disc face. A volume of the third groove gap is greater than a volume of the first groove gap and second groove gap.

Abstract: A valve includes a valve body defining a top end, a bottom end distal from the top end, and a shaft bore defined in the top end and the bottom end; a valve shaft positioned at least partially within the shaft bore of the valve body and defining an end bore; and a shaft blowout prevention fastener secured within the end bore of the valve shaft.

Abstract: A valve includes an annular body defining a body bore. An annular valve seat is positioned in the body bore and an annular groove is defined in a portion of the annular sealing surface. A rotatable valve element is positioned in the body bore. With the valve element in a closed and an unpressurized condition, the annular groove is deformed and a first groove gap is defined in the annular groove adjacent to the first disc face and a second groove gap is defined in the annular groove adjacent to the second disc face. With the valve element closed and in a pressurized condition, the annular groove is deformed and a third groove gap is defined in the annular groove adjacent to the first disc face. A volume of the third groove gap is greater than a volume of the first groove gap and second groove gap.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A valve includes a valve body defining a top end, a bottom end distal from the top end, and a shaft bore defined in the top end and the bottom end; a valve shaft positioned at least partially within the shaft bore of the valve body and defining an end bore; and a shaft blowout prevention fastener secured within the end bore of the valve shaft.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.