Abstract: One or more techniques and/or systems are disclosed for a flap valve in a diaphragm pump. The flap valve includes a body and a self-centering hinge portion. A front portion of the body includes a front surface having a raised portion and a recessed portion. The front surface is configured to form a seal with a surface of the pump when the body is in a closed position, the surface of the pump being at an inlet or an outlet of a pumping chamber. The body is configured to allow a downstream flow of a fluid when the flap valve is in an open position. The self-centering hinge portion is operably connected to the body. The self-centering hinge portion has a dynamically changing longitudinal axis. The body is configured to simultaneously translate and rotate about the dynamically changing longitudinal axis to form the seal.

Abstract: One or more techniques and/or systems are disclosed for an air operated double diaphragm pump with a selectably removable valve body for convenient repair and maintenance. The pump may include an inlet, an outlet, and first and second diaphragm chamber housings. Each first and second diaphragm chamber housings defines a diaphragm chamber. A valve body housing is arranged between the first and second diaphragm chamber housings. A valve body is arranged within the valve body housing, is in fluid communication with the diaphragm chambers of the first and second diaphragm chamber housings, and includes pilot signal ports, diaphragm chamber inlet ports, and chamber exhaust ports that are all accessible on a signal surface of the valve body. The signal surface may be on a same side of the valve body. To stabilize the pump during repair and maintenance, stabilizing feet may project from outer edges of the diaphragm chamber housings.

Abstract: One or more systems are disclosed for a diaphragm pump. The diaphragm pump includes a valve inlet portion elongated in a first direction along a longitudinal axis, and a valve outlet portion coupled to the valve inlet portion. A ball check valve is arranged between the valve inlet portion and the valve outlet portion. The ball check valve includes a sealing ring arranged over the valve inlet portion, and a ball arranged over the sealing ring. The ball is configured to move between a seated position and an unseated position, wherein a central axis of the ball extends through a center of the ball and in the first direction, wherein the central axis is coincident with the longitudinal axis when the ball is in the seated position, and wherein the central axis is offset from the longitudinal axis when the ball is in the unseated position.

Abstract: One or more techniques and/or systems are disclosed for a flap valve in a diaphragm pump. The flap valve includes a body and a self-centering hinge portion. A front portion of the body includes a front surface having a raised portion and a recessed portion. The front surface is configured to form a seal with a surface of the pump when the body is in a closed position, the surface of the pump being at an inlet or an outlet of a pumping chamber. The body is configured to allow a downstream flow of a fluid when the flap valve is in an open position. The self-centering hinge portion is operably connected to the body. The self-centering hinge portion has a dynamically changing longitudinal axis. The body is configured to simultaneously translate and rotate about the dynamically changing longitudinal axis to form the seal.

Abstract: A filtration device for filtering air for use with a fuel vapor recovery system. According to one aspect, the device includes a housing defining a chamber having a rotational axis an upper end and a lower end, a cap closes the housing and includes at least one generally helical passageway helically extending generally toward the lower end of the chamber and includes at least one air inlet. According to another aspect, the device includes a non-circular filter element disposed between an air inlet and an air outlet.

Abstract: An air control module comprises a canister purge valve, a vapor blocking valve, a canister vent valve and a housing, wherein at least a portion of the canister purge valve, the vapor blocking valve, and the canister vent valve are disposed within the housing. The housing may optionally include three ports fluidly coupled to the canister purge valve, the vapor blocking valve, and the canister vent valve respectively. The canister purge valve may be fluidly coupled to an atmospheric vent and an evaporation canister (which may be mechanically coupled to the housing of the air control module) for controlling the passage of fuel vapor from the evaporator canister to an engine. The vapor blocking valve may be fluidly coupled to a fuel tank and the evaporation canister, while the canister vent valve may be fluidly coupled to an engine and the evaporation canister. The housing may optionally include an air filter fluidly coupled to the canister vent valve.

Abstract: A filtration device for filtering air for use with a fuel vapor recovery system. According to one aspect, the device includes a housing defining a chamber having a rotational axis an upper end and a lower end, a cap closes the housing and includes at least one generally helical passageway helically extending generally toward the lower end of the chamber and includes at least one air inlet. According to another aspect, the device includes a non-circular filter element disposed between an air inlet and an air outlet.

Abstract: A dust separation device for separating contaminants from a fluid. The device may include at least one spiral fin disposed in an inlet tube for directing at least a portion of the contaminants in a spiral flow, and a deflector for deflecting at least a portion of the contaminants into a into a collection chamber. A fuel system for an internal combustion engine and a method of separating contaminants from a fluid are also provided.

Abstract: An air control module comprises a canister purge valve, a vapor blocking valve, a canister vent valve and a housing, wherein at least a portion of the canister purge valve, the vapor blocking valve, and the canister vent valve are disposed within the housing. The housing may optionally include three ports fluidly coupled to the canister purge valve, the vapor blocking valve, and the canister vent valve respectively. The canister purge valve may be fluidly coupled to an atmospheric vent and an evaporation canister (which may be mechanically coupled to the housing of the air control module) for controlling the passage of fuel vapor from the evaporator canister to an engine. The vapor blocking valve may be fluidly coupled to a fuel tank and the evaporation canister, while the canister vent valve may be fluidly coupled to an engine and the evaporation canister. The housing may optionally include an air filter fluidly coupled to the canister vent valve.