An electrically-operated ON/OFF valve for a high pressure hydrogen tank for an automotive fuel cell system has a valve body, a solenoid group, a first gate that achieves a first-stage seal, and a sealing element provided with a main sealing surface to achieve a second-stage seal. The first-stage seal and the second-stage seal are both achieved by the sealing element.

A valve arrangement for a switching valve and to a switching valve for regulating a mass flow in a refrigerating circuit or a heating circuit, including a valve housing, which includes a feed opening and a discharge opening, including a valve piston, which includes a valve-closing member, which buts against a through-hole between the feed opening and the discharge opening in a closed position on a valve seat and closes the through-hole, wherein the valve seat includes a stop surface and a sealing surface which are oriented so as to be adjacent to one another, the valve-closing member includes a supporting surface and a gasket surface which are oriented so as to be adjacent to one another, an elastic sealing element is provided on the valve seat or the valve-closing member, on which sealing element the sealing surface or gasket surface is formed, a sealing projection is provided on the sealing surface or the gasket surface and is oriented towards the opposite gasket surface or sealing surface, the supporting surface of the valve-closing member and the stop surface of the valve seat but against one another in the closed position and form a travel limitation between the valve-closing member and the valve seat, and the sealing projection is at least partially pressed into the sealing element.

The invention relates to a valve device (100) for a gaseous medium, in particular hydrogen, comprising a valve housing (6) and a solenoid armature (14) which is arranged in the valve housing and can move along the longitudinal axis (18) and which interacts with a first sealing seat (32) in order to open and close an outlet opening (40). Furthermore, the valve housing (6) is equipped with a second solenoid armature (16) which can be moved along the longitudinal axis (18) and which is at least partly received in a recess (38) of the first solenoid armature (14), and the second solenoid armature (16) interacts with a second sealing seat (34) in order to open and close an outlet opening (20) formed in the first solenoid armature (14). The first solenoid armature (14) and the second solenoid armature (16) are additionally surrounded by a magnet device (11), by means of which the first solenoid armature (14) and the second solenoid armature (16) can be moved along the longitudinal axis (18) using precisely one solenoid (10).

A solenoid valve includes: a valve housing having, at one end thereof, an inlet port through which a fluid is introduced and having, at the other end thereof, an outlet port through which the fluid is discharged; a solenoid provided in the valve housing and disposed between the inlet port and the outlet port; a first plunger provided at one end of the solenoid adjacent to the inlet port and configured to selectively open or close the inlet port by being rectilinearly moved by the solenoid; a first spring member configured to provide elastic force to allow the first plunger to move in a direction in which the first plunger closes the inlet port; a second plunger provided at the other end of the solenoid adjacent to the outlet port and configured to selectively open or close the outlet port by being rectilinearly moved by the solenoid in a direction opposite to the movement direction of the first plunger; and a second spring member configured to provide elastic force to allow the second plunger to move in a direction in which the second plunger closes the outlet port. The solenoid valve has a simplified structure while ensuring sealability.

A solenoid valve includes a main poppet configured to control a flow rate of working fluid flowing in a valve passage according to a pilot pressure, an auxiliary poppet configured to adjust the pilot pressure according to the electromagnetic force, and a first seat portion and a second seat portion provided in the valve passage. The main poppet includes a poppet valve seated on the first seat portion and a spool valve slidable in the second seat portion. The spool valve includes an outer peripheral surface slidable relative to the second seat portion and through holes open on the outer surface and configured such that areas thereof exposed from the second seat portion change in accordance with a movement of the spool valve.

A tank assembly for a pressure-assist toilet includes a flush assembly having an outer chamber and an inner chamber disposed in the outer chamber. The flush assembly further includes a flush valve disposed in the inner chamber, and a pilot valve disposed in the inner chamber and extending through the flush valve. The tank assembly further includes an actuator engaging the pilot valve and configured to hold the pilot valve at each of a first height, a second height offset a first distance from the first height, and a third height offset a second distance from the first height greater than a first distance.

A fluid control device includes: a valve body accommodating chamber having an inner space divided into a first chamber and a second chamber by a first valve body; a receiving port, which opens to the first chamber and through which a fluid from an accumulator is received in the first chamber, and a discharge port, which opens to the first chamber and through which the fluid is discharged from the first chamber; a guide path guiding the fluid from the accumulator to the second chamber such that the first valve body moves to a valve-closed position to close the discharge port; a second valve body switchable between a state of maintaining pressure of the fluid guided to the second chamber and a state of releasing the pressure; and a bias member biasing the first valve body to the valve-closed position.

The invention relates to a valve device (100) for a gaseous medium, in particular hydrogen, comprising a valve housing (6) and a solenoid armature (14) which is arranged in the valve housing and can move along the longitudinal axis (18) and which interacts with a first sealing seat (32) in order to open and close an outlet opening (40). Furthermore, the valve housing (6) is equipped with a second solenoid armature (16) which can be moved along the longitudinal axis (18) and which is at least partly received in a recess (38) of the first solenoid armature (14), and the second solenoid armature (16) interacts with a second sealing seat (34) in order to open and close an outlet opening (20) formed in the first solenoid armature (14). The first solenoid armature (14) and the second solenoid armature (16) are additionally surrounded by a magnet device (11), by means of which the first solenoid armature (14) and the second solenoid armature (16) can be moved along the longitudinal axis (18) using precisely one solenoid (10).

A valve, in particular a pilot-operated proportional directional poppet valve, has a valve housing (7) with a fluid inlet (21) and a fluid outlet (23). The fluid stream between the fluid inlet (21) and the fluid outlet (23) is adjustable by a main piston (27). A pilot valve chamber (37) provided on a rear face (29) of the main piston (27) has a pilot valve closing member (33) movable by an actuating device (69). By closing member (33) the fluid stream between the pilot valve chamber (37) and the fluid outlet (23) can be adjusted. An inlet aperture (3) is arranged between the fluid inlet (21) and the pilot valve chamber (37). A maximum volumetric flow controller (5) is in the main piston (27) in an outflow between the pilot valve chamber (37) and the fluid outlet (23).

A tank assembly for a pressure-assist toilet includes a flush assembly having an outer chamber and an inner chamber disposed in the outer chamber. The flush assembly further includes a flush valve disposed in the inner chamber, and a pilot valve disposed in the inner chamber and extending through the flush valve. The tank assembly further includes an actuator engaging the pilot valve and configured to hold the pilot valve at each of a first height, a second height offset a first distance from the first height, and a third height offset a second distance from the first height greater than a first distance.