Abstract: A method and apparatus are provided to clean a paint feed-line (1) of a painting system, line running from at least one paint tank (2, 9) to a paint deposition device (3) and feeding paint in this direction during the operational stages. During cleaning stages between operational stages, a cleaning substance is forced through the feed line (1). An inert gas, for instance nitrogen, is used as the gas for this purpose, and at the end of the cleaning stages the feed line (1) is filled with the inert gas. The gas remains in the feed line (1) until the next operational stage begins.

Abstract: A method and apparatus are provided to clean a paint feed-line (1) of a painting system, line running from at least one paint tank (2, 9) to a paint deposition device (3) and feeding paint in this direction during the operational stages. During cleaning stages between operational stages, a cleaning substance is forced through the feed line (1). An inert gas, for instance nitrogen, is used as the gas for this purpose, and at the end of the cleaning stages the feed line (1) is filled with the inert gas. The gas remains in the feed line (1) until the next operational stage begins.

Abstract: A spraycoating device includes at least one coating liquid spray gun (2) which contains a measuring valve device (40) opening or closing a compressed gas measuring valve flow path (42) depending on the positions of a liquid feed valve (4). The measurement of the compressed gas flow allows automatically determining whether the liquid feed valve (4) is situated in a fully close or a fully open position or in an arbitrary intermediate position thereto.

Abstract: Cooling gas is fed through a cooling-gas line (14) to a liquid atomizer, preferably an atomizing bell (4) in order to cool its end surface (24) configured underneath streaming coating liquid and therefore in contact with the ambient air. The cooling reduces coating deposition at this end surface or reduces the rate of layering.

Abstract: A method and apparatus are provided to clean a paint feed-line (1) of a painting system, line running from at least one paint tank (2, 9) to a paint deposition device (3) and feeding paint in this direction during the operational stages. During cleaning stages between operational stages, a cleaning substance is forced through the feed line (1). An inert gas, for instance nitrogen, is used as the gas for this purpose, and at the end of the cleaning stages the feed line (1) is filled with the inert gas. The gas remains in the feed line (1) until the next operational stage begins.

Abstract: A spraying method and a spray system which comprises a unit (16) metering accessory liquid into the coating-liquid's spray jet (14).

Abstract: A valve needle (2), in particular for spraycoating apparatus and their spraycoating devices. The valve needle (2) has a shank (4) and a plunger (8) affixed thereon. The shank (4) is made of another material than is the plunger (8). A preferred material for the shank (4) is an industrial ceramic.

Abstract: A spray-coating system includes a spraying implement (2) affixable to a support (4) by a tightening element (26) which is affixed to one of the implement and the support (2, 4) so as to be rotatable relative to both parts (2, 4).

Abstract: A spraycoating device comprising at least one coating liquid spray gun (2) which contains a measuring valve device (40) opening or closing a compressed gas measuring valve flow path (42) depending in the positions of a liquid feed valve (4). The measurement of the compressed gas flow allows automatically determining whether the liquid feed valve (4) is situated in a fully close or a fully open position or in an arbitrary intermediate position thereto.

Abstract: A spray system and a spraying method for coating liquids. An accessory liquid (10) wets the front, external surface's terminal zone (8) of the spray system (2) discharging the spray jet (6) of coating liquid, for instance the front terminal zone of the external periphery of a rotating atomizing bell (4), in order to prevent drying and layering of coating liquid (10) precipitated on the external surface.

Abstract: A valve needle (2), in particular for spraycoating apparatus and their spraycoating devices. The valve needle (2) consists of a shank (4) and of a plunger (8) affixed thereon. The shank (4) is made of another material than is the plunger (8). A preferred material for the shank (4) is an industrial ceramic.

Abstract: A fluid spray system in particular for a spray-coating material, comprising a spray nozzle (2) detachably affixed by a rapid rotational connection assembly (22, 24, 26, 28, 30) to a main body (4).

Abstract: A spray-coating system comprising a spraying implement (2) affixable to a support (4) by a tightening element (26) which is affixed to one of said part (2, 4) so as to be rotatable relative to both parts (2, 4).