Patent ID: 7837071
Filing Date: 2010-11-23
Classification: B05B,B05C

Abstract:
1. Valve device of an application device for applying fluid to a substrate, comprising a valve body, a valve housing with associated nozzle for emission of the fluid under pressure and having an inner chamber which can admit fluid and a valve seat, a supply fluid chamber which can be subjected to fluid pressure, a fluid connection between supply fluid chamber and valve housing inner chamber, a valve actuating device which is formed by an electromagnetic device with valve piston movable back and forth against a return force and engaging in the valve seat for opening and closing the valve nozzle, and a piston stop which forms an adjusting piston and against which the valve piston operates and which is mounted so as to be displaceable in the direction of the stroke for setting and adjusting the piston stroke, the valve actuating device being arranged between the supply fluid chamber and the valve housing, and the valve nozzle being detachably mounted on the nozzle side of the valve device which comprises it, characterized in that the valve device has a nozzle plate which closes the valve body at the bottom on the nozzle side, with mounting opening for the valve piston, in that the valve housing is designed in the form of a nozzle orifice which is a closure member that can be fitted on the mounting opening of the nozzle plate from below and removed, the valve nozzle forming part of the valve housing, and the valve piston engaging in the valve seat for opening and closing the valve nozzle when the closure member is fitted, while the valve piston is exposed through the mounting opening of the nozzle plate for removal and fitting when the closure member is removed, in that the valve device is provided with at least one rectilinear fluid duct that remains free from flow corners and that, passing the valve actuating device, connects the supply fluid chamber to the valve seat of the valve housing inner chamber, the valve piston and part of the adjusting piston together forming a wall of the straight fluid duct which, when the nozzle orifice closure member is removed, is exposed for cleaning through the mounting opening.