| 摘要 |
<p>Easily replaceable pressure reducers (190, 200) are located at the front of the spray gun (20) behind the air (180) and fluid (178) nozzles. These reducers (190, 200) are calibrated and marked for use with a particular air (180)/fluid (178) nozzle combination and maintain </= 10 psig exit air pressure. If the air (180)/fluid (178) nozzle combination is changed, the pressure reducers (190, 200) matched to the new combination (180, 178) are installed at the same time, illustratively using a screwdriver. By designing the air (180)/fluid (178) nozzle combination and pressure reducers (190, 200) as matched sets, the spray gun (20) can always inexpensively be kept in compliance with any requirements under which an HVLP device must operate. "Fan-" or shaping-compressed air driven from the same compressed air which supplies the nozzle (180, 178) air is supplied through an additional pressure reducer valve (52) to reduce its pressure below that of the nozzle (180, 178) air. The fan air reducer (52) employs a drilled orifice (208) of a calculated diameter. The atomizing air reducer (190) is of a needle (192) type that utilizes a controlling outside diameter. <IMAGE></p> |
