A fluid check valve for use in an aircraft fluid handling system having a confined surrounding structure where a first distance is defined between a fluid duct and the surrounding structure where the design of the fluid check valve is configured to facilitate removal of a first flange and the flow duct by moving the first flange and flow duct a second distance that is less than the first distance. The check valve is offset into the upstream side of a second flange to provide the reduction in the distance that the first flange has to be displaced to remove the first flange and flow duct from the check valve. A first alternate configuration of the fluid check valve utilizes rotational stops attached to the downstream surface of the flow flaps and in a second alternate embodiment configuration, rotational stops extend upstream from the flow flaps.

An internal engagement structure of a housing for a water control valve, the water control valve including the housing and a valve assembly, and the housing contains: a holder and a cover. The holder is configured to accommodate the valve assembly, and the cover is covered on the holder. The holder includes two opposite receiving grooves, two locking recesses formed on two lower ends of the two opposite receiving grooves respectively and communicating with the holder, and two tilted guide faces arranged on two upper ends of the two opposite receiving grooves respectively. The cover includes two opposite retainers extending downward from a bottom thereof and corresponding to the two opposite receiving grooves respectively, two hooks formed on two lower ends of the two opposite retainers respectively, and two cutouts defined above the two hooks respectively and configured to accommodate the two tilted guide faces respectively.

A fluid control valve for a faucet includes a body, a stem, a moveable disc, and at least one stationary disc. The stem is rotatably coupled to the body. The moveable disc is coupled to the stem and is configured to rotate with the stem. The at least one stationary disc is coupled to the body below the moveable disc. The fluid control valve is configured to be biased in an axial direction against a retaining element within a valve body by an incoming supply of fluid through the at least one stationary disc, so as to retain the fluid control valve within the valve body along the axial direction.

An internal engagement structure of a housing for a water control valve, the water control valve including the housing and a valve assembly, and the housing contains: a holder and a cover. The holder is configured to accommodate the valve assembly, and the cover is covered on the holder. The holder includes two opposite receiving grooves, two locking recesses formed on two lower ends of the two opposite receiving grooves respectively and communicating with the holder, and two tilted guide faces arranged on two upper ends of the two opposite receiving grooves respectively. The cover includes two opposite retainers extending downward from a bottom thereof and corresponding to the two opposite receiving grooves respectively, two hooks formed on two lower ends of the two opposite retainers respectively, and two cutouts defined above the two hooks respectively and configured to accommodate the two tilted guide faces respectively.

An insert is provided for insertion through an opening in the surface of a conduit, the insert comprising an insert body having first and second open ends defining an axis of flow therebetween. The insert further comprises a valve flap connected to the insert body. The valve flap is moveable between a closed position in which it creates a closure, thereby preventing flow along said axis, and an open position in which the valve flap allows flow along the axis. The valve flap is arranged so that, when in the open position, it is substantially U-shaped in side cross-section and is oriented with respect to the insert body so that said U-shape arches over the axis of flow.

A fluid control valve for a faucet includes a body, a stem, a moveable disc, and at least one stationary disc. The stem is rotatably coupled to the body. The moveable disc is coupled to the stem and is configured to rotate with the stem. The at least one stationary disc is coupled to the body below the moveable disc. The fluid control valve is configured to be biased in an axial direction against a retaining element within a valve body by an incoming supply of fluid through the at least one stationary disc, so as to retain the fluid control valve within the valve body along the axial direction.

A fluid control valve includes a body, a stem, a moveable disc, a stationary disc, and a valve seal. The stem is rotatably coupled to the body, and is configured to freely rotate three hundred and sixty degrees relative to the body. The moveable disc is coupled to the stem, and is configured to rotate with the stem. The stationary disc is coupled to the body below the moveable disc. The valve seal is coupled to the body below the stationary disc, and is reversible such that the valve seal is configured to be coupled to the body in at least two different orientations.

A mounting structure for a faucet body and a shaft includes a faucet body made of a zinc alloy material, a shaft seat assembly, a shaft and a press cover. The faucet body has a vertical passage and a mounting passage. The shaft seat assembly is disposed separately from the faucet body. The shaft seat assembly includes a shaft seat located in the vertical passage and a sleeve located in the mounting passage. The shaft is inserted in the sleeve and located between the press cover and the shaft seat. The mounting structure can reduce the material cost of the faucet body and ensure the water quality and the strength of the faucet body.

A mounting structure for a faucet body and a shaft includes a faucet body made of a zinc alloy material, a shaft seat assembly, a shaft and a press cover. The faucet body has a vertical passage and a mounting passage. The shaft seat assembly is disposed separately from the faucet body. The shaft seat assembly includes a shaft seat located in the vertical passage and a sleeve located in the mounting passage. The shaft is inserted in the sleeve and located between the press cover and the shaft seat. The mounting structure can reduce the material cost of the faucet body and ensure the water quality and the strength of the faucet body.

An insert is provided for insertion through an opening in the surface of a conduit, the insert comprising an insert body having first and second open ends defining an axis of flow therebetween. The insert further comprises a valve flap connected to N the insert body. The valve flap is moveable between a closed position in which it creates a closure, thereby preventing flow along said axis, and an open position in which the valve flap allows flow along the axis. The valve flap is arranged so that, when in the open position, it is substantially U-shaped in side cross-section and is oriented with respect to the insert body so that said U-shape arches over the axis of flow.