Abstract: The invention relates to a nozzle, preferably for use in sprinklers and spray heads, for spraying extinguishing medium, the nozzle comprising a housing (7), an inlet end (1) and a first conduit (2) leading from the inlet end to a nozzle opening (3) to enable the spraying of the medium through the nozzle. In order that the flow in the nozzle would grow notably with an increase in pressure, the nozzle comprises a second conduit (4) for spraying the medium from the nozzle, a valve element (6) loaded by a spring (5) being arranged in the conduit so as to keep the second conduit closed when the valve element is subjected to a first pressure by said medium, and the valve element being arranged to open said second conduit when the valve element is subjected to a second pressure by said medium, and the second pressure being higher than the first pressure.

Abstract: The invention relates to a power source for supplying water-based liquid to a system, the power source comprising a container (5) for the water-based liquid and a pump unit (6) which comprises a pump (7) and a power source (8) for the pump, the pump unit being arranged to supply the water-based liquid from the container to the system via a pipe system (4) which is filled with a liquid.

Abstract: The invention relates to a sprinkler or a spray head comprising a housing (2), an inlet (3), a nozzle (4) mounted in the housing, a passage (17-18-13) from the inlet to the nozzle, and a holder (8) for a release means, the holder being mounted in front of the nozzle so that it prevents the nozzle from spraying extinguishing medium forward without hindrance, the nozzle being arranged to spray extinguishing medium once the release means has been released. The holder (8) is mounted in the housing (2) by means of a locking mechanism, which is arranged to open and release the holder (8) from the housing once the release means (7) has been released.

Abstract: The invention relates to an installation for extinguishing fire in a railway carriage for transportation of lorries, trailers and the like. In order to extinguish a fire efficiently in a trailer or the like, the installation comprising at least two spray heads (1, 2), whereof the first spray head (1) is placed in the railway carriage close to a first longitudinal side wall (3) of the railway carriage and obliquely directed downwards at an angle (&agr;1) of 40 to 70° in relation to a vertical plane, and the second spray head (2) is placed in the railway carriage close to a second longitudinal side wall (4) of the railway carriage opposite the first side wall and obliquely directed downwards at an angle (&agr;2) of 40 to 70° in relation to the vertical plane, the spray heads being placed at a height of 3,2 to 4 m above the railway carriage floor (11) and arranged to spray water-based extinguishing medium at a spread angle (&bgr;1, &bgr;2) of 45 to 120°.