A valve (1) controls flow of methane in automotive systems and includes at least one sealing group (98) having a proximal sealing ring (99a), in direct contact with the gas in rest conditions. A distal sealing ring (99b) is made of different materials. A check valve device (120) is applicable to the valve (1) and includes an entrance sealing group (130) provided with a proximal sealing ring (130a) and a distal sealing ring (130b) made of different materials.

The invention is directed to a device (2) for regulating the pressure and/or flow of pressurized gas, comprising a body (4) with a gas inlet (6), a gas outlet (8) and a gas passage (10, 26) connecting the outlet (8) with the inlet (6), a gas shut-off device comprising a seat (22) in the passage (10) and a movable closure element (24) cooperating with said seat (22) and a piston (12) carrying the closure element (24) and delimiting with the body (4) a low pressure chamber (28) downstream of the shut-off device (22, 24). The body (4) comprises a first portion (4.sup.1) with the seat (22) and the inlet (6) and a second portion (4.sup.2) housing the piston (12) and delimiting the low pressure chamber (28). The second portion (4.sup.2) is movable relative to the first portion (41) between a closed position, and an open position.

A steam valve 10 of an embodiment includes: a valve element 32 of a steam control valve 30, the valve element 32 being provided to be movable in an up and down direction; a valve element 42 of a main stop valve 40, the valve element 42 being provided under the valve element 32 coaxially with the valve element 32 to be movable in the up and down direction; a valve seat 60 with which the valve element 32 and the valve element 42 come into and out of contact; and a guide tube 43 slidably supporting a valve rod 41 including the valve element 42, and having a flange portion 43a at a bottom side in a casing 20. The steam valve 10 further includes: the casing 20 housing the valve element 32, the valve element 42, the valve seat 60, and the guide tube 43; a drain discharge hole 23 formed at a bottom side of the casing 20; a drain pipe 70 provided with a shutoff valve 71 and communicating with the drain discharge hole 23; and a flow direction changing part 80 which changes a direction in which steam having passed between the valve element 32 and the valve seat 60 and flowing along the guide tube 43 flows toward the drain discharge hole 23.

A dispenser includes a housing, an inverted container disposed in the housing, a outlet nozzle, a pump, a first check valve, and a second check valve. The container holds a fluid. The pump is disposed between the container and the outlet nozzle. The pump includes a pump inlet in fluid communication with the container, a pump outlet in fluid communication with the outlet nozzle, and a pump chamber in fluid communication with the pump inlet and the pump outlet. The pump chamber is movable between an expanded position and a compressed position. The first check valve is disposed between the pump and the outlet nozzle, and the first check valve has a first cracking pressure. The second check valve is disposed between the first check valve and the outlet nozzle, and the second check valve has a second cracking pressure. The second cracking pressure of the second check valve is greater than the first cracking pressure of the first check valve.

A fill limit vent valve for a fuel system includes a housing assembly, an outlet port and a flow dam. The housing assembly has a main housing including a cylindrical body and an upper housing portion. The upper housing portion has a lower wall that defines an orifice and an outer cylindrical wall that defines an upper housing chamber. The outlet port is formed on the main housing and fluidly communicates fuel vapor out of the fill limit valve. The orifice is offset from a centerpoint of the lower wall in a direction away from the outlet port. The flow dam extends from the lower wall into the upper housing chamber and connects on opposite ends to the outer cylindrical wall. The flow dam and upper housing chamber cooperating to form a liquid trap that mitigates the possibility of liquid fuel from reaching the outlet port from the orifice.

A valve delimiting an internal circuit extending between an upstream end and a downstream end, the valve including, arranged in series in the internal circuit; an isolation valve and a dust valve, the isolation valve being movable relative to a set between an upstream closed position of the circuit and at least one downstream open position of the circuit. The isolation valve being biased toward the upstream position by a return member, the dust valve having a downstream end and being arranged downstream of the isolation valve and being movable relative to the body between an upstream closed position of the upstream end of the circuit and at least one downstream open position of the upstream end of the circuit.

A valve (1) controlling flow of methane gas in automotive systems includes a feed duct (30) of the gas to the delivery duct (20); having a by-pass duct (32) delimited by a by-pass duct (34) internal to the tank duct (6), to limit the overall dimensions in the attachment area to the tank.

The invention refers to an arrangement of a valve and a pressure vessel. The valve has a housing with at least an opening, a plunger slideably positioned in the housing, a control mechanism to cause plunger movement. The pressure vessel has an exterior surface with at least an opening. The valve is connected to the at least an opening of the pressure vessel. The plunger has at least a first part with a larger size and a second part with a smaller size. The first part of the plunger is positioned outside of the pressure vessel in all valve configurations.

A single use valve structured to allow only one fluid or gas or powder filling or extraction operation of a container such that neither a subsequent refilling nor a subsequent extraction operation can be performed. The single use valve may be used for extraction of ink from, or filling of ink to, a security ink container.

The invention relates to a pressure maintaining gas cylinder valve. It consists of a pressure retaining device: The axis of the pressure retaining device and that of the valve element are in the same vertical plane; the pressure retaining device has a mounting base, a spring and a valve are located in the mounting base: the valve is in the valve element near the air outlet; the front section of the valve is near the air outlet, while the rear section of the valve is in the mounting base; the spring is between the valve and the mounting base. Because the invention has no eccentricity, the gas channel is smoother and the volume of the cylinder valve is greatly reduced. The mounting seat of the pressure retaining device not only provides support for the valve and spring, but also ensures that the stroke of the valve element is not interfered.