Abstract: A device for a liquid treatment unit includes a UV generating element, arranged inside a compartment, which compartment is arranged in a liquid treatment enclosure, which enclosure is arrange with an inlet and an outlet, wherein the compartment includes UV light permeable material, and wherein the liquid to be treated surrounds the compartment. The invention is characterised in that the device includes a mechanical cleaning element arranged to and capable of cleaning outer surface of the compartment when the unit is in operation.

Abstract: The present invention relates to a ventilation system for a protective suit for use in hazardous environments. In a further aspect it concerns the protective suit itself. An air purifying respirator draws air from outside the protective suit through a filter, supplies filtered breathing air via a breathing hose to a space within the face piece, and supplies filtered ventilating air via a ventilating hose to the interior of the protective suit. A ventilation valve in the ventilating hose automatically closes only during periods of high breathing demand to counter a pressure drop inside the face piece.

Abstract: The present invention relates to a ventilation system for a protective suit for use in hazardous environments. In a further aspect it concerns the protective suit itself. An air purifying respirator draws air from outside the protective suit through a filter, supplies filtered breathing air via a breathing hose to a space within the face piece, and supplies filtered ventilating air via a ventilating hose to the interior of the protective suit. A ventilation valve in the ventilating hose automatically closes only during periods of high breathing demand to counter a pressure drop inside the face piece.