Abstract: A thrust plate for a butterfly valve includes a thrust plate body that defines a recess. The recess extends between a bottom thrust surface, side walls and an open top. A wear-resistant coating is located on the bottom thrust surface.

Abstract: A multi-flapper check valve includes a housing with an opening surrounded by a ring-shaped rim, a plurality of flappers, and a hinge that connects an end of each flapper to the rim of the housing. When the multi-flapper check valve is in a closed position, a first edge of each flapper seals against a second edge of an adjacent flapper.

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: An aircraft bleed system includes a low pressure supply port for delivering a first fluid at a first pressure. Also included is a high pressure supply port for delivering a second fluid at a second pressure, the second pressure greater than the first pressure. Further included is a feedback circuit in operable communication with the high pressure supply port for receiving the second fluid. The feedback circuit includes a first branch configured to route the second fluid to a high pressure control piston for manipulating the high pressure control piston between a high pressure closed position and a high pressure open position. The feedback circuit also includes a second branch configured to route the second fluid to a low pressure control piston moveably disposed within the high pressure control piston for manipulating the low pressure control piston between a low pressure closed position and a low pressure open position.

Abstract: A piston includes an outer shell having a receptacle at one end and a link retainer. The link retainer is configured to be positioned within the receptacle and affixed to the outer shell. The link retainer and the outer shell each define an opposing wall of a sealing ring groove, and one of the link retainer and the outer shell has an outer surface defining a base of the sealing ring groove.

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 butterfly valve comprises a housing including a bore, a rotatable shaft passing through the bore, a disc mounted to the shaft for controlling the flow of a fluid through the bore, a thrust load reacting section and a wear interface. The thrust load reacting section includes a thrust plug assembled in a thrust reacting end of the shaft and a thrust plate secured to the housing. The thrust plate has a well for axially retaining the thrust plug and the thrust reacting end of the shaft. The wear interface includes a first contact region on the thrust plug with a first contact surface and a second contact region at the base of the well with a second contact surface. A portion of the first contact surface is spherical and in contact with a portion of the second contact surface.

Abstract: An aircraft bleed system includes a low pressure supply port for delivering a first fluid at a first pressure. Also included is a high pressure supply port for delivering a second fluid at a second pressure, the second pressure greater than the first pressure. Further included is a feedback circuit in operable communication with the high pressure supply port for receiving the second fluid. The feedback circuit includes a first branch configured to route the second fluid to a high pressure control piston for manipulating the high pressure control piston between a high pressure closed position and a high pressure open position. The feedback circuit also includes a second branch configured to route the second fluid to a low pressure control piston moveably disposed within the high pressure control piston for manipulating the low pressure control piston between a low pressure closed position and a low pressure open position.

Abstract: A piston includes an outer shell having a receptacle at one end and a link retainer. The link retainer is configured to be positioned within the receptacle and affixed to the outer shell. The link retainer and the outer shell each define an opposing wall of a sealing ring groove, and one of the link retainer and the outer shell has an outer surface defining a base of the sealing ring groove.

Abstract: An air cycle machine includes a turbine wheel, a turbine inlet nozzle, a valve body, and a poppet member. The turbine wheel is mounted to rotate within the air cycle machine and the turbine inlet nozzle is positioned to direct airflow thereto. The poppet member selectively extends into the turbine inlet nozzle and the valve body controls a pressure on the poppet member to move the poppet member relative to the turbine inlet nozzle to vary the size of the turbine nozzle directing airflow to the turbine wheel.

Abstract: A butterfly valve assembly for use in a fluid flow containing particles of debris is provided including a valve element. The valve element has a seal groove that extends about a periphery and defines an upstream side and a downstream side of the valve element. A seal is disposed within the seal groove. A clearance exists between the seal and an edge of the seal groove. Also, a relief is formed in either the valve element or the seal. The particles of debris accumulate in the relief and not the clearance.

Abstract: A thrust plate for a butterfly valve includes a thrust plate body that defines a recess. The recess extends between a bottom thrust surface, side walls and an open top. A wear-resistant coating is located on the bottom thrust surface.

Abstract: A butterfly valve comprises a housing including a bore, a rotatable shaft passing through the bore, a disc mounted to the shaft for controlling the flow of a fluid through the bore, a thrust load reacting section and a wear interface. The thrust load reacting section includes a thrust plug assembled in a thrust reacting end of the shaft and a thrust plate secured to the housing. The thrust plate has a well for axially retaining the thrust plug and the thrust reacting end of the shaft. The wear interface includes a first contact region on the thrust plug with a first contact surface and a second contact region at the base of the well with a second contact surface. A portion of the first contact surface is spherical and in contact with a portion of the second contact surface.

Abstract: A check valve (10) includes a valve housing (14) having at least one valve opening (16). At least one petal (12) is located in the valve housing (14) and is configured to substantially cover the at least one valve opening (16) when the at least one petal (12) is in a closed position. The at least one petal (12) is rotable about a hinge axis (22) toward an open position thereby allowing fluid to flow through the at least one valve opening (16). The check valve (10) includes at least one compliant petal stop (24), (36) to prevent rotation of the at least one petal (12) beyond the open position.

Abstract: A seal ring assembly has a carbon member extending between spaced ends, and with a step at an outer periphery. A ring is received in the step to maintain spaced ends of the carbon member towards each other. A valve disc and shaft, a butterfly valve, and a method of installing a carbon ring seal are also disclosed. In a separate feature, a valve housing for a butterfly valve includes a first housing portion defining a flow passage, and a second housing portion extending integrally from the first housing portion, and defining a space to mount a valve shaft.

Abstract: An air cycle machine includes a turbine wheel, a turbine inlet nozzle, a valve body, and a poppet member. The turbine wheel is mounted to rotate within the air cycle machine and the turbine inlet nozzle is positioned to direct airflow thereto. The poppet member selectively extends into the turbine inlet nozzle and the valve body controls a pressure on the poppet member to move the poppet member relative to the turbine inlet nozzle to vary the size of the turbine nozzle directing airflow to the turbine wheel.

Abstract: A valve for use in an aircraft that includes a cabin that requires conditioned air and avionics that may require conditioned air. The valve includes a housing, a single flapper disposed in the housing, a first opening in the housing in proximity to the flapper for carrying conditioned air to the avionics, a second opening in the housing in proximity to the flapper for carrying conditioned air to the cabin, an electromechanical device for moving the flapper from a first position in which air may be vented to the first opening and not the second opening and a second position where air may be ducted to the second opening and not the first opening.

Abstract: A check valve (10) includes a valve housing (14) having at least one valve opening (16). At least one petal (12) is located in the valve housing (14) and is configured to substantially cover the at least one valve opening (16) when the at least one petal (12) is in a closed position. The at least one petal (12) is rotable about a hinge axis (22) toward an open position thereby allowing fluid to flow through the at least one valve opening (16). The check valve (10) includes at least one compliant petal stop (24), (36) to prevent rotation of the at least one petal (12) beyond the open position.

Abstract: A compressor assembly comprises a compressor having a rotor comprising a shaft with fan blades for compressing air. An air bearing serves to cool the shaft of the rotor. A compressor air inlet receives air for the fan blades, which is then exhausted from the fan blades out a compressor air outlet. An air flow path communicates air from the compressor air inlet to the air bearing. A valve controls the flow of air through the air flow path and has an open position permitting air through the air flow path and a closed position restricting air to the path.

Abstract: A compressor assembly comprises a compressor having a rotor comprising a shaft with fan blades for compressing air. An air bearing serves to cool the shaft of the rotor. A compressor air inlet receives air for the fan blades, which is then exhausted from the fan blades out a compressor air outlet. An air flow path communicates air from the compressor air inlet to the air bearing. A valve controls the flow of air through the air flow path and has an open position permitting air through the air flow path in a closed position restricting air to the path.