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WALTHER Spritz- und Lackiersysteme GmbH

Kärntner Str. 18-30
D-42327 Wuppertal

+49 202 / 787-0
202 / 787 - 2217

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Spray guns and coating systems

Walther PILOT develops and manufactures top-quality products in application technology. The manual and automatic spray guns are produced at the headquarters at Wuppertal. In spraying one can distinguish between the air atomization (pneumatic spraying) and the airless (hydraulic spraying) processes. In the atomization process, distinction is based on the pressure used: low-pressure (0.7 bar, HVLP), medium pressure (1.3 bar, HVLPplus) and conventional (high-pressure air atomization at 4 to 6 bar). The painting process starts with choosing the appropriate material and placing it in the material container. From that point it is moved to the material nozzle in the spray gun. Located along the route taken by the material is the material needle valve; it regulates the flow of material. The  atomization air flows around the material as it exits the nozzle and divides it into miniature droplets. The spray jet is created.

The source of energy for atomization is the pressurized air which enters the pistol through the air connector. The amount of air is controlled by the air volume regulator while the width of the spray jet is controlled at the round and broad spray regulator. The spray gun is now ready for use. To initiate atomization, the trigger is first retracted slightly. Thus the air valve (poppet valve) built into the air regulation system is opened. The path for the air is now free (preparatory air flow). When the trigger is pulled further, the material needle valve retracts from the material nozzle. The path for the material is also free. Matching the pattern of the spray jet to the object being painted is handled with infinite regulation between round and broad spray. The application speed will have to be matched to the spray width. When the round/broad spray regulator is opened, pressurized air is passed through the two horns on the air cap; this air widens the round spray. This regulating screw is closed when the round spray pattern is desired. Additional parameters (material quantity) can be determined by selecting the nozzle size.

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