According to embodiments of the present invention, an apparatus is provided. The apparatus includes a relief valve having an inlet pathway arranged to receive a medium flowing in the apparatus, and an outlet pathway arranged for the medium from the inlet pathway to flow through at a relief state to relieve pressure in the apparatus, an outlet pressure sensor arranged to determine an outlet pressure associated with the outlet pathway, and a processing circuit configured to determine a status of the relief valve based on the outlet pressure.

A flow suppression device adapted to be connected to a high pressure fluid system includes an outer flow containment member of a porous and flexible construction. The outer flow containment member has an upstream end and a downstream end opposite the upstream end. The upstream end includes an inlet opening adapted to receive a flow stream of pressurized fluid from the high pressure fluid system and the downstream end being substantially closed. The flow suppression device also includes a primary inner flow containment member of a porous and flexible construction contained within the outer flow containment member. The primary inner flow containment member has an upstream end with an inlet opening adjacent the inlet opening of the outer flow containment member and a downstream end opposite the upstream end of the primary inner flow containment member.

A flow suppression device adapted to be connected to a high pressure fluid system includes an outer flow containment member of a porous and flexible construction. The outer flow containment member has an upstream end and a downstream end opposite the upstream end. The upstream end includes an inlet opening adapted to receive a flow stream of pressurized fluid from the high pressure fluid system and the downstream end being substantially closed. The flow suppression device also includes a primary inner flow containment member of a porous and flexible construction contained within the outer flow containment member. The primary inner flow containment member has an upstream end with an inlet opening adjacent the inlet opening of the outer flow containment member and a downstream end opposite the upstream end of the primary inner flow containment member.

An isolation assembly for a boiler unit that incorporates a pressure relief valve and an automatic air vent to a valve body that includes a valve positioned adjacent to the automatic air vent. The unitary valve body reduces the number of components and leak paths and incorporates a ball valve to permit removing and/or securing the automatic air vent without having to purge the adjacent plumbing system.

An electropneumatic field device, such as an electropneumatic setting regulator or the like, incorporates a protective housing which has a housing cover and in which at least one electronic component and at least one pneumatic component are arranged. The protective housing is connected to at least one electric field input, at least one pneumatic supply inlet, and at least one pneumatic field outlet. The electric field input is connected to the electronic component, the pneumatic supply inlet and the pneumatic field outlet are coupled to the pneumatic component, the pneumatic component is connected to the electronic component for signaling purposes, and the protective housing has a ventilation device paired with the pneumatic component. The pneumatic component is at least partly surrounded by the housing cover which is releasably connected to the protective housing, and the ventilation device of the protective housing is integrated into the housing cover.

An electropneumatic field device, such as an electropneumatic setting regulator or the like, incorporates a protective housing which has a housing cover and in which at least one electronic component and at least one pneumatic component are arranged. The protective housing is connected to at least one electric field input, at least one pneumatic supply inlet, and at least one pneumatic field outlet. The electric field input is connected to the electronic component, the pneumatic supply inlet and the pneumatic field outlet are coupled to the pneumatic component, the pneumatic component is connected to the electronic component for signaling purposes, and the protective housing has a ventilation device paired with the pneumatic component. The pneumatic component is at least partly surrounded by the housing cover which is releasably connected to the protective housing, and the ventilation device of the protective housing is integrated into the housing cover.

A valve 10, for relieving ground water pressure on a swimming pool for containing pool water. A body 30 defines a flow path. An element 20 is mounted to be moved in a direction from a position, in which at least one feature 22 of the element co-operates with at least one feature 33 of the body to form a sealing arrangement to block the flow path to retain the pool water, to a position in which the flow path is open to allow ground water into the swimming pool. The sealing arrangement defines an effective area over which the ground water pressure acts to drive the element in the direction, and an effective area over which pool water pressure acts to drive the element opposite the direction. The co-operable features are configured such that a ratio, of the effective area over which the ground water pressure acts to the effective area over which pool water pressure acts, has a value of at least 0.9.

A battery housing includes a valve device for pressure equalization and for letting out a hot gas of a battery cell. The valve device has a valve seat in the form of a gas release opening in a housing wall of the battery housing and a valve body. The valve body closes the gas release opening when in a closed position, can be moved by a pressure-difference-induced internal pressure increase into a first open position in which the valve body reversibly opens the gas release opening to provide pressure equalization, and can be moved by a hot-gas-induced internal pressure increase into a second open position in which the valve body irreversibly opens the gas release opening to let out the hot gas.

A pressure relief valve includes a housing having a fluid inlet and at least one fluid outlet. A first structure mounted in the housing and fixed in relation thereto is in magnetic attraction with a second structure coupled to a piston disposed in a portion of the housing. The piston defines a chamber disposed adjacent to the fluid outlet(s) throughout the piston's stroke. The piston includes a sealing element providing a sealing force to prevent flow through the valve. The sealing force is independent of the magnetic attraction force between the first and second structures.

A pressure relief valve includes a housing having a fluid inlet and at least one fluid outlet. A first structure mounted in the housing and fixed in relation thereto is in magnetic attraction with a second structure coupled to a piston disposed in a portion of the housing. The piston defines a chamber disposed adjacent to the fluid outlet(s) throughout the piston's stroke. The piston includes a sealing element providing a sealing force to prevent flow through the valve. The sealing force is independent of the magnetic attraction force between the first and second structures.