Systems and methods described herein provide for pressure relief valve detection and monitoring. A valve assembly includes a valve body, having an inlet and an outlet, and a valve seat insert attached to the valve body between the inlet and the outlet. The valve body also includes an indicator assembly, a disk positioned within the valve seat insert; and a stem extending between the disk and the indicator assembly. The stem includes a magnet. A magnetic sensor is operable to identify proximity of the magnet. The valve seat insert is operable to release the disk when pressure at the inlet exceeds a threshold value. The disk, when released, moves the stem and magnet into a position that is detected by the magnetic sensor, and the indicator assembly indicates a valve opening event when the position is detected.

This disclosure includes safety valves, vehicles and fueling stations having the same, and related methods. Some safety valves have a valve body defining a fluidic network including an inlet and an outlet, a piston disposed within and movable relative to the valve body between a first position in which the inlet is in fluid communication with the outlet and a second position in which fluid communication between the inlet and the outlet is prevented, and a heat-defeatable barrier that prevents movement of the piston to the second position. In some safety valves, the piston is biased toward the second position. In some safety valves, the piston includes a channel disposed between first and second ends of the piston, and when the piston is in the first position, the inlet is in fluid communication with the outlet via the channel.

A downhole tool includes a body defining a bore axially therethrough and a port in communication with the bore and extending radially through the body, an inner cap positioned in the port, the inner cap sealing the port, and an outer cap positioned in the port. The outer cap is spaced apart from the inner cap, and the outer cap seals the port, such that a chamber is defined between the inner and outer caps in the port. The inner cap is configured to move toward outer cap in response to a first pressure differential between bore and the chamber across the outer cap. The inner cap is configured to dislodge the outer cap from the port in response to the inner cap engaging the outer cap and a second pressure differential between the bore and an exterior of the downhole tool being reached across the inner cap.

A downhole tool includes a body defining a bore axially therethrough and a port in communication with the bore and extending radially through the body, an inner cap positioned in the port, the inner cap sealing the port, and an outer cap positioned in the port. The outer cap is spaced apart from the inner cap, and the outer cap seals the port, such that a chamber is defined between the inner and outer caps in the port. The inner cap is configured to move toward outer cap in response to a first pressure differential between bore and the chamber across the outer cap. The inner cap is configured to dislodge the outer cap from the port in response to the inner cap engaging the outer cap and a second pressure differential between the bore and an exterior of the downhole tool being reached across the inner cap.

A rupture disc for a device for protecting against overpressures inside an apparatus, the disc is made of a generally circular part including two planar surfaces substantially parallel to one another, and two notches each located along a circumference, the circumferences of the two notches being different from one another, the notch located on the larger circumference being made on one of the planar surfaces, referred to as lower surface, while the notch located on the smaller circumference is made on the other one of the planar surfaces, referred to as upper surface.

Valve (V) for a pressure vessel comprises a hollow cylindrical valve cover element (1) adapted to define an outer cover for a hollow body (2) adapted to be disposed, in use, to the inside of the element (1) itself in the hollow part (C) of the said element (1); and a pawl (3) adapted to be inserted and housed, in use, inside said hollow body (2).

Valve (V) for a pressure vessel comprises a hollow cylindrical valve cover element (1) adapted to define an outer cover for a hollow body (2) adapted to be disposed, in use, to the inside of the element (1) itself in the hollow part (C) of the said element (1); and a pawl (3) adapted to be inserted and housed, in use, inside said hollow body (2).

The disclosure relates to a pressure release valve (100). The pressure release valve may be suitable for use as an oil recovery valve. In one embodiment, the pressure release valve may comprise a piston (5) and tube (4) configured to slide within a valve body, wherein the piston is configured to remain sealingly engaged with the tube until the pressure release valve fully activates. Upon activation, the piston may disengage from the tube, thereby allowing fluid to escape from the valve through the tube.

The disclosed coupling can include an elongate body having an opening at each end, the openings linked by a conduit; a valve assembly located within the elongate body. The valve assembly is movable between an open position, in which gas can pass between the openings along the conduit, and a closed position in which gas flow between the openings is prevented; a biasing assembly arranged within the elongate body to move the valve assembly into the closed position; and a heat activatable stop located in the region of each opening, operable to hold the valve assembly in the open position against the biasing assembly, and adapted to release the valve assembly to allow the biasing assembly to move the valve assembly to the closed position at an activation temperature.

This disclosure includes safety valves, vehicles and fueling stations having the same, and related methods. Some safety valves have a valve body defining a fluidic network including an inlet and an outlet, a piston disposed within and movable relative to the valve body between a first position in which the inlet is in fluid communication with the outlet and a second position in which fluid communication between the inlet and the outlet is prevented, and a heat-defeatable barrier that prevents movement of the piston to the second position. In some safety valves, the piston is biased toward the second position. In some safety valves, the piston includes a channel disposed between first and second ends of the piston, and when the piston is in the first position, the inlet is in fluid communication with the outlet via the channel.