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Aker Engineering & Technology As

Finn Wichstrom

Nils T Ottestad

Arrangement for reducing harmful effects from fire and/or explosion comprising wall elements that are placed in adjacent relationship to one another to form a continuous wall. The element are adapted, when an explosion occurs, to open the area towards the surroundings until the pressure in the area is balanced in relation to the surroundings. Thereafter the elements return to their closed state to enclose the area in relation to the surroundings, preventing air from the surroundings from entering the enclosed area and prevent fire extinguishing fluids from exiting the enclosed area. Preferably, the elements comprises an elastically deformable material so that when the element is forced open, elastic energy is stored in the element to rapidly return the element to the closed state.

Arrangement for reducing harmful effects from fire and explosion

A system for controlling the working conditions for mechanical pumps supplying associated devices with pressure fluid via a pipe system. A valve means ( ) is placed between at least one of the pumps and an appurtenant device supplied by the pump, which valve means is arranged to open only when the pump has started up, and by adjustment of its flow cross-section seeks to maintain its downstairs pressure at a value (P ) which is predetermined from the specifications of the pipe system and said device, but gives priority to restrict its flow cross-section so that counterpressure of the pump does not fall below a given minimum value (P ) determined from the characteristic properties of the pump. The valve means is a regulating valve ( ) operating in accordance with this functional principle. The regulating valve is based on a servo function utilising the Upstream pressure of the valve, the valve comprising a main valve body ( ) having an end surface constituting a movable surface in the servo chamber ( ), the volume of the servo chamber, and thereby the flow cross-section of the regulating valve, being regulated by a pair of control valves ( ) affected by the upstream pressure and the downstream pressure, respectively.

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Hvalstad, Norway

Finn Wichstrom