Abstract: A protective cap assembly for a pressurized valve adapted to detect a leak therethrough. In accordance with various embodiments, the cap assembly includes a body adapted for placement in fluid communication with the valve, and a sensory indicator supported by the cap assembly body to provide human sensory indication of pressurized fluid leaking from the valve in its closed position. In various embodiments, the sensory indicator can be a whistle that makes an audible sound, a light emitting device that emits a visible light, or both. In further embodiments, the cap assembly body can be coupled to the vent conduit via a tether, and ejected responsive to exhausted pressurized fluid when the valve transitions to the open position. The displaced cap assembly body serves as a visual indication that the valve has opened.

Abstract: Apparatus for equalizing pressure within a vapor space of a storage vessel. In accordance with various embodiments, a pressure equalization assembly has a base housing member adapted to be mounted to a tank adjacent a tank aperture in fluidic communication with a vapor space of the tank. A canister assembly is adapted for removable engagement with the housing member between a closed position and an open position. The closed position establishes a fluidic seal interface between the housing member and the canister assembly. The open position provides user access to the vapor space through the tank aperture. The canister assembly further has a compound seal assembly with first and second pistons biased against corresponding first and second annular seal members while the canister assembly is in both the closed position and the open position. A third annular seal member is disposed between the canister assembly and the base housing member.

Abstract: A protective cap assembly for a pressurized valve adapted to detect a leak therethrough. In accordance with various embodiments, the cap assembly includes a body adapted for placement in fluid communication with the valve, and a sensory indicator supported by the cap assembly body to provide human sensory indication of pressurized fluid leaking from the valve in its closed position. In various embodiments, the sensory indicator can be a whistle that makes an audible sound, a light emitting device that emits a visible light, or both. In further embodiments, the cap assembly body can be coupled to the vent conduit via a tether, and ejected responsive to exhausted pressurized fluid when the valve transitions to the open position. The displaced cap assembly body serves as a visual indication that the valve has opened.