Abstract: A bypass valve assembly for a turbine generator includes a valve body, bypass seats, valve stem, valve cap, bypass valve disc, bypass valves, and pressure seal head. The valve body defines a central bore and a plurality of passageways. Each passageway has an inlet smaller than its outlet. Each bypass seat is within the inlet of a corresponding passageway. The bypass seats have a higher wear resistance than the valve body. The valve stem is within the central bore. The valve cap is secured to the valve body. The bypass valve disc is secured to the valve stem. Each bypass valve has a base portion and a nose portion. Each nose portion defines a contoured surface area with a wear coating and extends into a corresponding passageway. The pressure seal head is disposed around the valve stem and defines steps having a wear coating.

Abstract: A bypass valve assembly for a turbine generator includes a valve body, bypass seats, valve stem, valve cap, bypass valve disc, bypass valves, and pressure seal head. The valve body defines a central bore and a plurality of passageways. Each passageway has an inlet smaller than its outlet. Each bypass seat is within the inlet of a corresponding passageway. The bypass seats have a higher wear resistance than the valve body. The valve stem is within the central bore. The valve cap is secured to the valve body. The bypass valve disc is secured to the valve stem. Each bypass valve has a base portion and a nose portion. Each nose portion defines a contoured surface area with a wear coating and extends into a corresponding passageway. The pressure seal head is disposed around the valve stem and defines steps having a wear coating.

Abstract: A bypass valve assembly for use in turbine generators includes a valve body defining a central bore and a plurality of passageways. Each passageway has a smaller area at an inlet portion and a larger area at an outlet portion to define a flared passageway. A plurality of bypass valves is disposed within the plurality of passageways within the valve body. Each bypass valve includes a base portion and a nose portion, with each nose portion defining a predefined contoured surface area. At least a portion of the contoured surface area includes a wear coating disposed thereon. Optionally, the wear coating includes a plasma enhanced magnetron sputtering nanocoating.

Abstract: A bypass valve assembly for use in turbine generators includes a valve body defining a central bore and a plurality of passageways. Each passageway has a smaller area at an inlet portion and a larger area at an outlet portion to define a flared passageway. A plurality of bypass valves is disposed within the plurality of passageways within the valve body. Each bypass valve includes a base portion and a nose portion, with each nose portion defining a predefined contoured surface area. At least a portion of the contoured surface area includes a wear coating disposed thereon. Optionally, the wear coating includes a plasma enhanced magnetron sputtering nanocoating.

Abstract: A steam turbine may include a turbine section including a rotor. An inner casing is provided about the turbine, the inner casing including an upstream end, a downstream end and an inner casing exhaust port positioned at the downstream end allowing exhaust steam to exit the inner casing. An outer casing is provided about the inner casing, the outer casing including an upstream end, a downstream end and an outer casing exhaust port positioned at the upstream end of the outer casing. A flow path extends between the inner casing and the outer casing through which the exhaust steam passes in an upstream direction from the inner casing exhaust port to the outer casing exhaust port. A flow barrier may be provided in the flow path between the inner casing and the outer casing.

Abstract: A steam turbine may include a turbine section including a rotor. An inner casing is provided about the turbine, the inner casing including an upstream end, a downstream end and an inner casing exhaust port positioned at the downstream end allowing exhaust steam to exit the inner casing. An outer casing is provided about the inner casing, the outer casing including an upstream end, a downstream end and an outer casing exhaust port positioned at the upstream end of the outer casing. A flow path extends between the inner casing and the outer casing through which the exhaust steam passes in an upstream direction from the inner casing exhaust port to the outer casing exhaust port. A flow barrier may be provided in the flow path between the inner casing and the outer casing.