Method of adjusting the pressure balance or a control device, in particular of a servo valve, the requisite adjusting movement being applied by a disc translator.

A solenoid valve assembly is provided. The solenoid valve assembly includes a pilot assembly, a body, and a main poppet valve assembly. The pilot assembly includes a frame having an external wall and an internal wall forming an annular cavity. The body includes an inlet cavity, a channel, an outlet cavity, and a main poppet valve seat disposed in the channel between the inlet cavity and the outlet cavity. The main poppet valve assembly includes a main poppet valve and two movable sealing elements. The main poppet valve has a cylindrical shape having an internal diameter, an external diameter, and grooves. The main poppet valve is at least partially disposed in the annular cavity and configured to shut the main poppet valve seat. The movable sealing elements are disposed in the grooves to seal the main poppet valve to the external wall and the internal wall of the frame.

An inflation valve and systems for inflating an inflatable device includes a valve. The valve includes an outer body, a command chamber within the outer body and an inlet chamber, the inlet chamber having an inlet connected to the source of inflation gas and an outlet connected to the inflatable device. The valve also includes a vent fluidly connected to the command chamber, the vent including a vent body having one or more vent holes formed therein and an elastomeric sleeve surrounding a portion of the vent body and covering the one or more vent holes.

An inflation valve and systems for inflating an inflatable device includes a valve. The valve includes an outer body, a command chamber within the outer body and an inlet chamber, the inlet chamber having an inlet connected to the source of inflation gas and an outlet connected to the inflatable device. The valve also includes a vent fluidly connected to the command chamber, the vent including a vent body having one or more vent holes formed therein and an elastomeric sleeve surrounding a portion of the vent body and covering the one or more vent holes.

The invention relates to a shut-off valve (1) for temporarily interrupting the supply of air to a fuel cell stack in a fuel cell system, said shut-off valve comprising a valve piston (3) which can move back and forth in a cylindrical housing bore (2) and is prestressed in the direction of a sealing seat (5) by the spring force of a spring (4), wherein a connection between an air inlet duct (6) and an air outlet duct (7) is established or interrupted depending on the axial position of the valve piston (3). According to the invention, inside the housing bore (2), one end of the valve piston (3) delimits a spring chamber (8) which accommodates the spring (4) and is subjected to ambient pressure, and the other end thereof delimits a control chamber (9) which can be connected to the air inlet duct (7) via a control valve (10). The invention also relates to a fuel cell system comprising a shut-off valve (1) according to the invention.

The invention relates to a shut-off valve (1) for temporarily interrupting the supply of air to a fuel cell stack in a fuel cell system, said shut-off valve comprising a valve piston (3) which can move back and forth in a cylindrical housing bore (2) and is prestressed in the direction of a sealing seat (5) by the spring force of a spring (4), wherein a connection between an air inlet duct (6) and an air outlet duct (7) is established or interrupted depending on the axial position of the valve piston (3). According to the invention, inside the housing bore (2), one end of the valve piston (3) delimits a spring chamber (8) which accommodates the spring (4) and is subjected to ambient pressure, and the other end thereof delimits a control chamber (9) which can be connected to the air inlet duct (7) via a control valve (10). The invention also relates to a fuel cell system comprising a shut-off valve (1) according to the invention.

A manifold body includes a body block, with one or more end connections each extending laterally outward from a first surface of the body block, one or more lower valve cavities each recessed laterally inward from the first surface, one or more upper valve cavities each recessed laterally inward from the first surface and connected with a corresponding one of the one or more lower valve cavities by a vertically extending second passage, one or more lower end ports each extending laterally outward from a second surface of the body block and connected with a corresponding one of the one or more lower valve cavities by a laterally extending third passage, and one or more upper end ports each extending laterally outward from the second surface and connected with a corresponding one of the one or more upper valve cavities by a laterally extending fourth passage.

A manifold body includes a body block, with one or more end connections each extending laterally outward from a first surface of the body block, one or more lower valve cavities each recessed laterally inward from the first surface, one or more upper valve cavities each recessed laterally inward from the first surface and connected with a corresponding one of the one or more lower valve cavities by a vertically extending second passage, one or more lower end ports each extending laterally outward from a second surface of the body block and connected with a corresponding one of the one or more lower valve cavities by a laterally extending third passage, and one or more upper end ports each extending laterally outward from the second surface and connected with a corresponding one of the one or more upper valve cavities by a laterally extending fourth passage.

A gate valve opens and closes a first opening of a first chamber in a vacuum processing apparatus. The gate valve includes: a valve element configured to open and close the first opening; a drive configured to move the valve element so that the valve element takes at least a closing position, where the valve element closes the first opening, and an opening position, where the valve element opens the first opening; a first gas line and a second gas line; and a first switching valve that connects one of the first gas line and the second gas line to the drive. The drive moves the valve element from the opening position to the closing position by pressure of gas supplied from the first gas line or the second gas line, and holds the valve element at the closing position by pressure of gas supplied from the second gas line.

A valve arrangement for a pressurized fluid source includes a valve housing comprising an inlet, an outlet, and a main fluid channel extending along a longitudinal axis of the valve housing. The valve arrangement further includes a spool and a regulating poppet valve coaxially located in the main fluid channel. The spool and a regulating poppet valve are both configured to translate along the longitudinal axis of the valve housing independent of each other. In response to the spool moving to an open position, the poppet valve regulates the flow of a pressurized fluid flowing from the inlet to the outlet of the valve housing.