Staying of a drain on a cylinder attached to a lower side of a valve casing is suppressed, and occurrence of corrosion of the cylinder is suppressed.

A steam valve includes a valve casing, a valve disc disposed within the valve casing, a cylinder disposed on a lower side of the valve casing and having a piston rod extending upward, a valve stem vertically penetrating a lower portion of the valve casing and having one end coupled to the piston rod via a coupling and having another end coupled to the valve disc, a cover having a larger diameter than the piston rod and the coupling and configured to separate the piston rod and the coupling from each other by being interposed between the piston rod and the coupling, and a tubular skirt hanging down from a peripheral portion of the cover and surrounding a periphery of a head portion of the piston rod.

A switching valve device for switching an intermediate flow path through which a fluid flows from an inlet to an outlet includes: a first valve which switches a flow path extending from the inlet to one of two flow paths; and a second valve which is provided on a downstream side of the first valve and switches the intermediate flow path by a differential pressure generated by depressurization in an external flow path Lout connected to the intermediate flow path connected to one of the two flow paths.

A steam valve having a first inclined surface, which is formed at the distal end portion of a valve rod and in which the outer diameter of the valve rod increases from the distal end toward the base end of the valve rod, and a second inclined surface, which is formed on the inside of a portion of a main valve that is positioned on the base-end side of the valve rod and which inclines with the same inclination angle as the first inclined surface. In a state in which a slave valve and the main valve are closed the first inclined surface and the second inclined surface are separated from each other, and when the slave valve and the main valve are in a fully open state the first inclined surface and the second inclined surface abut each other.

Ring disc nozzle check valve 100 allows fluid flow in one direction and can act as a relief valve and comprises valve body 1 which defines valve body fluid passageways 20,22 therethrough; primary seat 2 disposed in valve body fluid passageways 20,22 proximate fluid inlet 30; primary disc 4 disposed in valve body fluid passageways 20,22 proximate fluid inlet 30 and in communication with primary seat 2; secondary disc 5 nested within valve body fluid passageways 20,22, where secondary disc 5 defines secondary seat 3 at a peripheral edge of primary disc 4; diffuser 8 disposed in the valve body fluid passageway 20 proximate fluid outlets 32a,32b; primary spring 10 disposed in valve body fluid passageways 20,22 and in communication with diffuser 8 and primary disc 4, where primary spring 10 is adapted to urge primary disc 4 to a closed position; primary shaft 6 disposed within valve body fluid passageway 22 intermediate diffuser 8 and secondary disc 5, where primary shaft 6 is in communication with diffuser 8 and adapted to support and guide primary disc 4 and allow fluid flow through primary shaft 6; secondary shaft 7 disposed within valve body fluid passageway 22 and configured to support and guide secondary disc 5; secondary spring 11 disposed intermediate secondary shaft 7 and secondary disc 5 and configured to urge secondary disc 5 to a closed position; inner body valve seat support 9, which may act as a retention ring, disposed proximate to fluid outlets 32a,32b and configured to do not disrupt fluid flow within ring disc nozzle check valve 100 as the fluid passes over primary disc 4 and/or secondary disc 5; and one or more fasteners 12 configured to secure retention ring 9 to valve body 1.

A flow regulating switch valve includes a valve core that includes a switch assembly configured to drive a diaphragm assembly to open or close a water outlet, and also includes a flow regulating assembly that comprises a rotating ring, a sliding block, and a magnet. A control key is configured to control the switch assembly. The rotating ring is connected to the control key and includes an inclined plane that transitions from high to low and is configured to drive the sliding block to slide up and down such that the sliding block drives the magnet to move up and down. The magnet is configured to control the diaphragm assembly to regulate a size of the water outlet.

A valve for adjusting a fluid flow includes a valve cartridge with at least one first fluid opening, at least one second fluid opening, a preliminary stage with a first valve seat and a first closing element, and a main stage with a second valve seat and a second closing element. The first valve seat is at a first axial through-opening of the second closing element, which is at least partly in a preliminary stage sleeve. The first valve seat is within the preliminary stage sleeve, and a flow path from the at least one first fluid opening to the preliminary stage leads through at least one inflow opening, which is radially introduced in the preliminary stage sleeve. An axial filter gap formed between an actuation element and the preliminary stage sleeve overlaps the at least one inflow opening at least in some regions and together form a filter.

A hammer actuates a piston in a rapid response trigger to depressurize a control chamber, opening a path from a high pressure chamber to an exit conduit. The hammer acts in line with, but in opposition to, a spring biasing the control chamber closed using a centrally disposed piston. By aligning the spring, piston, and hammer in the same line of force, the response to the hammer is both more reliable and faster that prior triggers.

A valve assembly includes a housing body defining a first opening, a second opening and an internal chamber. A first mechanism is provided in the housing body to control fluid between the first opening and the interior chamber and a second mechanism is provided in the housing body to control fluid between the second opening and the interior chamber. The first and second control mechanisms operate independently.

A valve assembly includes a housing body defining a first opening, a second opening and an internal chamber. A first mechanism is provided in the housing body to control fluid between the first opening and the interior chamber and a second mechanism is provided in the housing body to control fluid between the second opening and the interior chamber. The first and second control mechanisms operate independently.

A slam-shut safety assembly configured to provide redundant safety shutoff in a gas distribution system. The slam-shut safety assembly includes a valve body, a first slam-shut safety device coupled to the valve body, and a second slam-shut safety device coupled to the valve body. The valve body has an inlet, an outlet, and defines a flow path extending between the inlet and the outlet. The first slam-shut safety device is configured to block the flow path at a first position responsive to an overpressure condition or an underpressure condition. The second slam-shut safety device is configured to block the flow path at a second position responsive to the overpressure condition or the underpressure condition.