A compressed gas storage system that includes a pressure vessel. The pressure vessel includes a first vessel portion and a second vessel portion in fluid communication with the first vessel portion. The pressure vessel includes a third vessel portion in fluid communication with the second vessel portion. The compressed gas storage system includes a first valve positioned between the first vessel portion and the second vessel portion and a second valve positioned between the second vessel portion and the third vessel portion. The first valve allows and impedes fluid flow between the first and the second vessel portions. The second valve allows and impedes fluid flow between the second and the third vessel portions.

A valve for pressurized fluid having a body housing a fluid circuit having an upstream end configured to be placed in communication with a reserve of pressurized fluid and a downstream end configured to be placed in communication with a user of fluid, the circuit including a collection of valve shutter(s) comprising at least one shutoff valve shutter allowing the circuit to be closed or opened, the valve including a mechanism for manually controlling the collection of valve shutter(s), the control mechanism being mounted with the ability to move on the body between a rest position in which the collection of valve shutter(s) is in a position in which the circuit is closed and an active position in which the control mechanism actuates the collection of valve shutter(s) into a position in which the circuit is open to a first bore section.

A valve for pressurized fluid, including a body having a front face and a rear face and housing an internal fluid circuit having an upstream end configured to be placed in communication with a reserve of pressurized fluid and a downstream end configured to be placed in communication with a user of fluid, the circuit including a collection of valve shutter(s) including at least one shutoff valve shutter for closing or opening the circuit, the valve comprising a member for manually controlling the collection of valve shutter(s).

A method for inhibiting the formation of carbonyl compounds in a gas cylinder containing carbon monoxide wherein the gas cylinder is in fluid communication with a valve assembly wherein the valve assembly connects to a threaded opening in the gas cylinder by a threaded assembly by coating interior and exterior components of the valve assembly selected from the group consisting of an inlet port, an outlet port, a diaphragm and a lower spindle with an amorphous hydrogenated silicon compound. A valve assembly containing the coated interior and exterior components is also disclosed.

Embodiments of a polyethylene (“PE”) pipe servicing system of this disclosure may include a fusible PE fitting (F) providing a branch connection to a PE pipeline section or run (P), a valve (10) connected to the fitting and including quick connect/disconnect means, and a machine connectable to the valve including complementary quick connect/disconnect means. The quick connect means provide for full scope of operation, including cleaning, fusion, cool down, hot tap, plugging, and completion. No squeezing is used. The quick connect/disconnect means may include a first portion 20 of a cam profile and a second portion 40 of the cam profile complementary to that of the first. The machine may be a drilling or hot tapping machine (30T), a plugging machine (30P), or a completion machine (30C), and their associated tools. The valve and machine are more lightweight and faster and easier to use than the prior art.

A valve for compressed gas, comprising: a body with an inlet, an outlet and a passage interconnecting the inlet and with outlet; a shut-off device with a shutter mobile in translation along a longitudinal axis of the valve for cooperating with a seat in the passage, the shutter being urged by one or more elastic elements against the seat so as to normally close the passage; an actuating device configured to convert a pressure into a lifting movement of the shutter off the seat so as to open the passage; wherein the actuating device comprises an external circular flange or groove extending around the longitudinal axis and configured for being engaged by a robotic interface providing the pressure to the actuating device.

A valve for compressed gas, comprising: a body with an inlet, an outlet and a passage interconnecting the inlet and with outlet; a shut-off device with a shutter mobile in translation along a longitudinal axis of the valve for cooperating with a seat in the passage, the shutter being urged by one or more elastic elements against the seat so as to normally close the passage; an actuating device configured to convert a pressure into a lifting movement of the shutter off the seat so as to open the passage; wherein the actuating device comprises an external circular flange or groove extending around the longitudinal axis and configured for being engaged by a robotic interface providing the pressure to the actuating device.

A diaphragm pump such as a three-chamber diaphragm pump includes a head having an inlet port and an outlet port and defining an inlet side including inlet chambers; and an outlet side having a center outlet chamber. Each of the inlet chambers includes an associated inlet valve. A single shutoff valve controlling fluid flow to the center outlet chamber and a single bypass valve in fluid communication between the center outlet chamber and the inlet side. The single shutoff valve has a plunger with an oval cross-section extending into the center outlet chamber. The single shutoff valve and the single bypass valve have adjustable pressure set points that are adjustable independently of one another.

A valve assembly, a valve adapter and a bicycle tire are provided. The valve assembly includes a valve stem having a passage. A cap member is fluidly coupled to the passage and has circumferential concavity on an outer diameter adjacent an end. A core body is coupled to the valve stem and has a an axial opening. A biasing member is disposed within the axial opening. A seat is coupled between the core body and the cap member. A first sealing member is movably disposed between a first and second position, the sealing member being biased against the seat by the biasing member, the sealing member having a first end adjacent the seat and a lower portion. A second sealing member is operably coupled to the passage to selectively seal at least a portion of the passage, in response to movement of the lower portion.

A pressure regulating shut-off valve has a valve member regulating flow of fluid between an inlet and an outlet. The valve includes a pneumatic actuator having a piston having first and second faces that define first and second volumes within a cylinder. The second face has a greater surface area than the first face. The first and second volumes are fluidly connected to the inlet, and an electrically actuated valve controls the flow of fluid along a fluid path to the second volume. The electrically actuated valve closes the fluid path, when power is supplied to the electrically actuated valve, and opens the fluid path, when power is removed from the electrically actuated valve, which causes the pneumatic actuator to act on the valve member to hold the valve member in a fixed position.