Abstract: A bleed valve system includes a bleed valve, a valve regulator, a valve actuator and a reverse flow relief valve. The bleed valve is opened and closed to control a flow of bleed air from an upstream inlet to a downstream outlet. The valve regulator provides a servo pressure used to regulate the position of the bleed valve, and the valve actuator is mechanically connected to open/close the bleed valve based on the servo pressure provided by the valve regulator. The reverse flow relief valve compares a pressure upstream of the bleed valve to a pressure downstream of the bleed valve and in response to the downstream pressure exceeding the upstream pressure creates a fluid communication path between the servo pressure and an ambient pressure to decrease the servo pressure such that the bleed valve is closed.

Abstract: A valve flange joint includes a valve flange and first and second duct flanges. The first and second duct flanges include respective first and second mating portions. The first mating portion includes a first duct rim, a first duct face in contact with a first face of the valve flange, and a first slot. The second mating portion includes a second duct face in contact with a second face of the valve flange, and a second rim. In an embodiment, the valve flange includes a tab that extends in an axial direction through the first slot and includes an inner surface radially inward of an outermost portion of the second mating portion. In another embodiment, a first thickness is defined between the first flange face and the second flange face. Second and third thicknesses are also defined for the first and second mating portions. The three thicknesses are substantially similar.

Abstract: A check valve is provided and includes a body including a seat, a hinge bifurcating the seat to define openings and a housing coupled to the hinge and a self-trapping insert of compliant material. The self-trapping insert includes an end portion and is securable in the housing such that the end portion protrudes from a side of the housing to contact with a corresponding check valve flapper in a respective open position.

Abstract: A check valve is provided. The check valve includes a petal pivotably coupled to a hinge to occupy respective open and closed positions in accordance with a pressure differential of a fluid flow across the check valve and a lift generating element coupled to the petal and configured to aerodynamically interact with the fluid flow to generate a lift force on the petal.

Abstract: A check valve is provided and includes a body including a seat, a hinge bifurcating the seat to define openings and a housing coupled to the hinge and a self-trapping insert of compliant material. The self-trapping insert includes an end portion and is securable in the housing such that the end portion protrudes from a side of the housing to contact with a corresponding check valve flapper in a respective open position.

Abstract: A butterfly valve includes a duct defining a flow pathway and a valve disc rotably disposed in the flow pathway. A pneumatic actuator includes an intermediate chamber housing an actuator piston and is operably connected to the valve disc to drive rotation of the valve disc. A downstream bleed conduit extends from the flow pathway downstream of the valve disc to the intermediate chamber to pressurize the intermediate chamber thereby reducing a rate of movement of the valve disc in the flow pathway.

Abstract: A valve assembly is provided and includes a pitot tube having an angled tip to extract from a duct formed by a housing a sample of a fluid to be communicated to an actuator configured to operate the duct, the pitot tube being disposed within the housing whereby the pitot tube is fixed longitudinally between the actuator and the housing and laterally within the housing and an anti-rotation mechanism coupled with the pitot tube to rotationally secure the pitot tube such that the angled tip is fixed to face rearwardly.

Abstract: A valve assembly is provided and includes a pitot tube having an angled tip to extract from a duct formed by a housing a sample of a fluid to be communicated to an actuator configured to operate the duct, the pitot tube being disposed within the housing whereby the pitot tube is fixed longitudinally between the actuator and the housing and laterally within the housing and an anti-rotation mechanism coupled with the pitot tube to rotationally secure the pitot tube such that the angled tip is fixed to face rearwardly.

Abstract: A pneumatically actuated valve includes a valve body, a pneumatic actuator, and a pitot tube. The valve body includes a valve disc positioned in a valve housing that defines a flow passage with a flow passage diameter. The pneumatic actuator rotates the valve disc in the valve housing. The pitot tube is connected to the pneumatic actuator and has a tip extending into the flow passage. The tip is spaced apart from the valve housing by at least 1/20 of the flow passage diameter. The tip is substantially free of downstream obstructions for a distance equal to at least ½ of the flow passage diameter when the valve is in an open position.

Abstract: A valve assembly is provided and includes a pitot tube having an angled tip to extract from a duct formed by a housing a sample of a fluid to be communicated to an actuator configured to operate the duct, the pitot tube being disposed within the housing whereby the pitot tube is fixed longitudinally between the actuator and the housing and laterally within the housing and an anti-rotation mechanism coupled with the pitot tube to rotationally secure the pitot tube such that the angled tip is fixed to face rearwardly.