A device that equalizes an aircraft pressure difference has a separating wall, fixable to the aircraft, and a decompression valve. The wall is for fluidically separating first and second spaces, and has a flow opening that fluidically connects the spaces. The valve closes the flow opening. A securing element on the valve or wall enables a release of the valve when a pressure gradient between the spaces is exceeded, such that there is a fluidic connection between the spaces. The receiving element on the wall or valve is connected to the receiving element. The securing element has a rotary element and fixing elements. The rotary element is rotatably mounted about a rotational shaft. The rotary element is receivable in the receiving element. The fixing elements non-rotatably fix the rotary element beneath the predetermined pressure gradient. At least one of the fixing elements is a spring.

A device that equalizes an aircraft pressure difference has a separating wall, fixable to the aircraft, and a decompression valve. The wall is for fluidically separating first and second spaces, and has a flow opening that fluidically connects the spaces. The valve closes the flow opening. A securing element on the valve or wall enables a release of the valve when a pressure gradient between the spaces is exceeded, such that there is a fluidic connection between the spaces. The receiving element on the wall or valve is connected to the receiving element. The securing element has a rotary element and fixing elements. The rotary element is rotatably mounted about a rotational shaft. The rotary element is receivable in the receiving element. The fixing elements non-rotatably fix the rotary element beneath the predetermined pressure gradient. At least one of the fixing elements is a spring.

This specification discloses a Valve designed to be used in systems wherein it is desirable to activate and close the valve in response-to changes in pressure inside a pipeline downstream of the valve, without any dependency on electronic communications or external power, relying solely on the energy within the pipeline for sensing the differences and for closing the valve. The present invention is specifically targeted to petroleum pipelines, but is applicable to fluid pipelines and piping systems for any fluid, liquid or gaseous. The Valve functions by utilizing a lowered pressure downstream of the Valve in opposition to the full pipeline pressure on the upstream side of the Valve. The pressure downstream is typically lowered by providing a flow restrictor on the downstream side of the Valve, or incorporated into the downstream side of the Valve, in a system with a pump on the downstream side of the section of the pipeline it is intended to protect. A flapper, or hinged gate, is held in the open position by exposing said gate to the full line pressure on the side where the line pressure enters the Valve, while the side of the flapper opposite the flow is exposed to the lowered pressure or the pipeline downstream of the restrictor through a connection with the downstream pipeline. The differential pressure holds the hinged gate in the open position so long as the required differential is maintained. When a pre-determined compromise of the differential pressure occurs, the magnitude of which is designed into the Valve for each application or installation, and/or adjusted in the field by means provided, the hinged gate is freed from the open position and moves into sealing contact with the closed position seat.

This specification discloses a Valve designed to be used in systems wherein it is desirable to activate and close the valve in response-to changes in pressure inside a pipeline downstream of the valve, without any dependency on electronic communications or external power, relying solely on the energy within the pipeline for sensing the differences and for closing the valve. The present invention is specifically targeted to petroleum pipelines, but is applicable to fluid pipelines and piping systems for any fluid, liquid or gaseous. The Valve functions by utilizing a lowered pressure downstream of the Valve in opposition to the full pipeline pressure on the upstream side of the Valve. The pressure downstream is typically lowered by providing a flow restrictor on the downstream side of the Valve, or incorporated into the downstream side of the Valve, in a system with a pump on the downstream side of the section of the pipeline it is intended to protect. A flapper, or hinged gate, is held in the open position by exposing said gate to the full line pressure on the side where the line pressure enters the Valve, while the side of the flapper opposite the flow is exposed to the lowered pressure or the pipeline downstream of the restrictor through a connection with the downstream pipeline. The differential pressure holds the hinged gate in the open position so long as the required differential is maintained. When a pre-determined compromise of the differential pressure occurs, the magnitude of which is designed into the Valve for each application or installation, and/or adjusted in the field by means provided, the hinged gate is freed from the open position and moves into sealing contact with the closed position seat.

The present disclosure relates to a valve system that includes a valve having a spool moveable from an un-actuated position to an actuated position in response to actuation of the valve. The valve system also includes a wire to secure the valve in the un-actuated position, a first resistor electrically coupled with the wire and configured to release the wire to actuate the valve and move a first component coupled to the wire toward a second component, and a second resistor electrically coupled with the wire to detect connection of the first component with the second component.

A high-pressure fluid conduit that conducts high-pressure fluid from a high-pressure fluid source to a high-pressure fluid container through a hose unit during open or normal operation. This high-pressure fluid conduit has a safety feature that is activated when the high-pressure fluid conduit fails due to exposure to a predetermined force. The safety feature closes off the flow of high-pressure fluid from the high-pressure fluid source and closes off the escape of high-pressure fluid from the hose unit that entered the hose unit during open or normal operation.