A valve includes a valve housing body extending along a central longitudinal axis (X) between a first end and a second end. The valve housing comprises a first chamber at said first end comprising a gas inlet for receiving a gas and a second chamber at said second end having a plug provided at said second end, and an inter-chamber passageway connecting said first chamber to said second chamber. The valve further comprises a gas outlet provided in said inter-chamber passageway, and a piston provided in said inter-chamber passageway. The piston is movable between a first position wherein said outlet is blocked by said piston and a second position wherein said outlet is not blocked by said piston. The plug has a ventilation passageway extending therethrough. The valve has bypass channel configured to fluidly connect the first chamber to said second chamber and is not aligned with the ventilation passage.

A relief valve device having a spring, a valve bonnet, a valve stem, a disc holder, a valve disc, a huddling chamber, a blowdown ring, and a nozzle. In the valve device, the valve disc is positioned above the nozzle; the spring is disposed in the valve bonnet; the spring surrounds the valve stem such that a longitudinal axis of the spring and a longitudinal axis of the valve stem are coaxial; the disc holder surrounds an outer periphery of the valve disc and is adjacent and in direct contact with a surface of the valve disc around an entire perimeter of the valve disc; the blowdown ring is disposed at a top section of the nozzle; a bottom section of the nozzle is connected to a bottom surface of a valve body and the top section of the nozzle is connected to the valve disc; and the disc holder is filled with oil.

A vehicle includes an engine, a fuel tank, a canister, a valve, and a damper. The canister is configured to receive and store evaporated fuel from the fuel tank. The valve is disposed between the canister and the engine. The valve is configured to open to deliver evaporated fuel from the canister to the engine. The valve is configured to close to inhibit delivering evaporated fuel from the canister to the engine. The damper is secured to valve. The damper is configured to dampen movement of the valve between open and closed positions.

A valve assembly, comprising: a valve housing body extending along a longitudinal axis X between a first end and a second end and defining a cylindrical passage therethough from the first to the second end; a fluid inlet at the first end for receiving a pressurized fluid; and a fluid outlet provided in between the first and second end of the housing body; and a piston provided in said cylindrical passage, said piston being axially movable between a first position wherein said fluid outlet is blocked by said piston such that the piston blocks the flow of fluid from the inlet to the outlet, and a second position wherein said outlet is not blocked by said piston and a fluid flow path is formed from the inlet to the outlet.

A relief valve device having a spring, a valve bonnet, a valve stem, a disc holder, a valve disc, a huddling chamber, a blowdown ring, and a nozzle. In the valve device, the valve disc is positioned above the nozzle; the spring is disposed in the valve bonnet; the spring surrounds the valve stem such that a longitudinal axis of the spring and a longitudinal axis of the valve stem are coaxial; the disc holder surrounds an outer periphery of the valve disc and is adjacent and in direct contact with a surface of the valve disc around an entire perimeter of the valve disc; the blowdown ring is disposed at a top section of the nozzle; a bottom section of the nozzle is connected to a bottom surface of a valve body and the top section of the nozzle is connected to the valve disc; and the disc holder is filled with oil.

Gas flow control valve 3, wherein the gas flow control valve 3 comprises a housing 11 with a gas inlet 10, a valve seat 6 arranged in the housing 11, a valve body 5 assigned to the valve seat 6, wherein the valve body 5 is held by an upper spring and a lower spring and is centered by means of a diaphragm 26, and a gas outlet 12 which is positioned downstream of the valve body 5 and which is provided in the housing 11, wherein the valve body 5 is arranged in the valve seat 6 so as to be movable in a first movement direction 17 in order to form a controllable cross section of a passage opening 25 for the passage of gas, wherein an inversion of the diaphragm 26 is prevented by means of a support element 27.

Gas flow control valve 3, wherein the gas flow control valve 3 comprises a housing 11 with a gas inlet 10, a valve seat 6 arranged in the housing 11, a valve body 5 assigned to the valve seat 6, wherein the valve body 5 is held by an upper spring and a lower spring and is centered by means of a diaphragm 26, and a gas outlet 12 which is positioned downstream of the valve body 5 and which is provided in the housing 11, wherein the valve body 5 is arranged in the valve seat 6 so as to be movable in a first movement direction 17 in order to form a controllable cross section of a passage opening 25 for the passage of gas, wherein an inlet path 19, such as an inlet path 19 that is uniform in a flow direction, in particular a hollow cylindrical inlet path 19, is formed on the valve seat 6 upstream of the passage opening 25.

A fluid-damped valve comprises a body defining an internal cavity having an inlet for ingress of a fluid and an outlet for egress of the fluid, and a closure member having a narrowed end portion. The closure member is movably disposed within the internal cavity intermediate the fluid inlet and the fluid outlet. The valve includes a seat configured to sealingly receive the closure member. The seat defines a constricted portion of the internal cavity configured to non-sealingly receive the narrowed end portion and damp the flow of the fluid through the fluid-damped valve.

A valve having a high valve opening adjustment accuracy includes: a valve housing provided with an inlet port and an outlet port; a valve body driven by a drive source; a valve seat on which the valve body sits; a spring configured to urge the valve body in a direction opposite to a driving direction by the drive source; and a communication configured to communicate the inlet port with a back surface side space of the valve body.

A fluid-flow control device includes a valve aperture and a mounting member arranged downstream of the aperture. A valve member, movably mounted on the mounting member, controls the flow of fluid through the aperture. A control volume, defined between the mounting member and the valve member receives a control fluid from a control fluid feed. A variable flow restrictor is rotatably arranged within a restriction volume of the control fluid feed such that a flow path connecting the inlet, and the outlet, of the restriction volume is defined between the restrictor and the wall of the restriction volume. The restrictor is axi-symmetric about its axis of rotation.