A relief valve comprises a valve body, a pallet assembly, a relief pallet seat, a pilot pallet seat and a force element. The valve body has an interior in fluid communication with a container having a container pressure and the valve body having an exterior exposed to an atmosphere. The pallet assembly has a relief pallet having a relief pressure bearing area, a pilot pallet having a pilot pressure bearing area, and a shaft connects the pilot pallet and relief pallet to space the pilot pallet from the relief pallet. The relief pallet seat extends from the valve body towards the interior of the valve body and is configured to seal against the relief pallet to seal the valve body. The pilot pallet seat extending from the valve body and away from the interior of the valve body and is configured to seal against the pilot pallet to form a reservoir between the pilot pallet, the pilot pallet seat and the valve body. The reservoir has an equalization port to provide fluid communication between the valve body and the reservoir.

A relief valve comprises a valve body, a pallet assembly, a relief pallet seat, a pilot pallet seat and a force element. The valve body has an interior in fluid communication with a container having a container pressure and the valve body having an exterior exposed to an atmosphere. The pallet assembly has a relief pallet having a relief pressure bearing area, a pilot pallet having a pilot pressure bearing area, and a shaft connects the pilot pallet and relief pallet to space the pilot pallet from the relief pallet. The relief pallet seat extends from the valve body towards the interior of the valve body and is configured to seal against the relief pallet to seal the valve body. The pilot pallet seat extending from the valve body and away from the interior of the valve body and is configured to seal against the pilot pallet to form a reservoir between the pilot pallet, the pilot pallet seat and the valve body. The reservoir has an equalization port to provide fluid communication between the valve body and the reservoir.

A filling head for an operating liquid tank, in particular of a motor vehicle, comprising a filling tube with an inlet end, which lies farther away from the tank, and an outlet end, which lies nearer to the tank, the filling tube for conducting operating liquid in a filling direction from the inlet end to the outlet end, a venting arrangement with an inflow end, which lies nearer to the tank and an outflow end which lies farther away from the tank, which end is provided for passing of gas in a counter-flow direction with respect to liquid flowing in the filling direction, in a venting direction extending from the inlet to the outflow end, the venting arrangement is provided, at least in the area of its outflow end, separate from the filling tube, the venting arrangement has a valve with a gas valve body, which is movable between a closed position, in which a gas flow in a valve passage is prevented, and a passage position, in which the gas may flow in the valve passage past the gas valve body, the valve having a liquid valve body, which is movable between a blocking position, in which a liquid flow in the valve passage is blocked, and an open position, in which the valve passage past the liquid valve body is open.

A filling head for an operating liquid tank, in particular of a motor vehicle, comprising a filling tube with an inlet end, which lies farther away from the tank, and an outlet end, which lies nearer to the tank, the filling tube for conducting operating liquid in a filling direction from the inlet end to the outlet end, a venting arrangement with an inflow end, which lies nearer to the tank and an outflow end which lies farther away from the tank, which end is provided for passing of gas in a counter-flow direction with respect to liquid flowing in the filling direction, in a venting direction extending from the inlet to the outflow end, the venting arrangement is provided, at least in the area of its outflow end, separate from the filling tube, the venting arrangement has a valve with a gas valve body, which is movable between a closed position, in which a gas flow in a valve passage is prevented, and a passage position, in which the gas may flow in the valve passage past the gas valve body, the valve having a liquid valve body, which is movable between a blocking position, in which a liquid flow in the valve passage is blocked, and an open position, in which the valve passage past the liquid valve body is open.

A relief valve comprises a valve body, a pallet assembly, a relief pallet seat, a pilot pallet seat and a force element. The valve body has an interior in fluid communication with a container having a container pressure and the valve body having an exterior exposed to an atmosphere. The pallet assembly has a relief pallet having a relief pressure bearing area, a pilot pallet having a pilot pressure bearing area, and a shaft connects the pilot pallet and relief pallet to space the pilot pallet from the relief pallet. The relief pallet seat extends from the valve body towards the interior of the valve body and is configured to seal against the relief pallet to seal the valve body. The pilot pallet seat extending from the valve body and away from the interior of the valve body and is configured to seal against the pilot pallet to form a reservoir between the pilot pallet, the pilot pallet seat and the valve body. The reservoir has an equalization port to provide fluid communication between the valve body and the reservoir. The force element connects to and acts on the pallet assembly to maintain the pallet assembly in a sealed position against the relief pallet seat and the pilot pallet seat while the container pressure is above a selected opening pressure. The pilot pressure bearing area is less than the relief pressure bearing area, and the pilot pallet and relief pallet are configured so that when the container pressure is at or below the selected opening pressure, the relief pallet and the relief pallet seat unseal to form a relief port and the pilot pallet and the pilot pallet seat unseal to form a pilot port. The pilot port and the equalization port are configured such that when the container pressure is at or below the selected opening pressure, the gas flows through the pilot port into the reservoir from the atmosphere at a greater rate than through the equalization port from the reservoir to the valve body.

A pressure protection device includes a housing, a sliding block, and an adjusting block. The housing includes a receiving chamber communicating with a seal chamber and the housing defines a first gas hole and a second gas hole each communicating the receiving chamber to an ambient environment. The sliding block divides the receiving chamber into a first space and a second space and defines a through hole communicating the first space with the second space. The adjusting block is located in the first space and configured to be attracted to the sliding block so that the through hole is selectively blocked by the adjusting block. When the sliding block slides in the receiving chamber, the first gas hole is selectively blocked by the sliding block to isolate from or to communicate with the first space, and the second gas hole always communicates with the second space.

A pressure protection device includes a housing, a sliding block, and an adjusting block. The housing includes a receiving chamber communicating with a seal chamber and the housing defines a first gas hole and a second gas hole each communicating the receiving chamber to an ambient environment. The sliding block divides the receiving chamber into a first space and a second space and defines a through hole communicating the first space with the second space. The adjusting block is located in the first space and configured to be attracted to the sliding block so that the through hole is selectively blocked by the adjusting block. When the sliding block slides in the receiving chamber, the first gas hole is selectively blocked by the sliding block to isolate from or to communicate with the first space, and the second gas hole always communicates with the second space.

A mass and/or spring assisted rupture disc including a holder assembly, a rupture disc assembly having a membrane that is operatively connected with a mass and/or a spring to assist its rupture. The mass and/or spring assisted rupture disc is designed with a mass distribution that uses acceleration forces, which are present in many engineering applications, to aid in the opening. This allows a rupture disc that is more compact and more sensitive than a conventional rupture disc in applications with significant acceleration levels. The added force of both the mass and the spring makes the membrane more sensitive and tunable to rupture across a wider range of pressures.

A fluid delivery system, comprising at least one source of pressurized fluid; and, a pod, comprising, an inlet in fluid communication with the source, a piston in fluid communication with the inlet, wherein pressure exerted on the piston by the pressurized fluid causes the piston to move into at least one reservoir, applying pressure to at least one reservoir fluid disposed therein, an outlet in fluid communication with the at least one reservoir for output of at least the at least one reservoir fluid being pressured out of the at least one reservoir by the piston, a pressurized fluid bypass tube in fluid communication with the inlet at one end and in fluid communication with the outlet at a second end, and, wherein the output at least one reservoir fluid and the bypassed pressurized fluid are combined to form a mixture to be applied at an area of application.

A pressure protection device includes a housing, a sliding block, and an adjusting block. The housing includes a receiving chamber communicating with a seal chamber and the housing defines a first gas hole and a second gas hole each communicating the receiving chamber to an ambient environment. The sliding block divides the receiving chamber into a first space and a second space and defines a through hole communicating the first space with the second space. The adjusting block is located in the first space and configured to be attracted to the sliding block so that the through hole is selectively blocked by the adjusting block. When the sliding block slides in the receiving chamber, the first gas hole is selectively blocked by the sliding block to isolate from or to communicate with the first space, and the second gas hole always communicates with the second space.