Abstract:
A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves located within a housing and integrating a pressurization orifice. The initial opening of the valve in an axial direction enables gas to flow through the pressurization orifice at a first flow rate. The full opening of the valve in the axial direction enables the gas to flow through the second valve at a second flow rate, which is much higher than the first flow rate. The controlled pressurization of the gas through the orifice delays the time during which the gas reaches full recompression. The valve may be further provided with a vent for venting pressurized gas away from a nominally closed top surface of the lower valve element. The valve may be also provided with a valve inlet tube extending into a gas cylinder to prevent contaminants, particles and/or impurities from entering the valve. In a preferred embodiment of the invention, the valve has a deformable seal element that is sealed on both sides when the main passageway is closed. The deformable element, which may be an apertured disk, may be resiliently bowed or preloaded. This helps the disk remain in the desired position against a first one of the valve seats even after the disk is permanently deformed by the first valve seat.
Abstract:
PROBLEM TO BE SOLVED: To provide a method capable of shortening the time of constructing a terminal for liquefied natural gas (LNG) or liquefied petroleum gas (LPG). SOLUTION: The method for constructing an LNG or LPG terminal (3) including an external structure (7) and at least one storage tank (11) comprises a step of manufacturing the external structure, a step of simultaneously and independently manufacturing the storage tank, a step of allowing the external structure and the storage tank to be afloat after or when the manufacture of the external structure and the storage tank is completed, a step of allowing the storage tank to be afloat in the external structure, and a step of fixing the storage tank to the inside of the external structure. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves located within a housing and integrating a pressurization orifice. The initial opening of the valve in an axial direction enables gas to flow through the pressurization orifice at a first flow rate. The full opening of the valve in the axial direction enables the gas to flow through the second valve at a second flow rate, which is much higher than the first flow rate. The controlled pressurization of the gas through the orifice delays the time during which the gas reaches full recompression.