![]() The simple WINDOWS search function “Ctrl&F” allows you to search the table by gun type or air cap number or part number. Most air caps are listed with pressure range (both in BAR and PSI), air flow (LPM and SCFM), pattern size (MM and Inch) and whether the air cap is conventional, HVLP or TRANS-TECH. Containment Holes Performance of the Devilbiss Air Caps ![]() The size of the fan can be manually controlled by the spray gun’s “spreader valve,” which is actually the amount of air diverted to the side port air jets. The side ports (Figure 3) of the air cap shape the fluid stream into a fan shape. They provide additional force to help atomize the fluid stream because fluid exits the fluid nozzle at higher velocities in pressure feed spray guns. ![]() Angular converging holes (Figure 4) are typically found on air caps for pressure feed spray guns. 6) prevent the spray pattern from expanding too quickly and also keep the side ports (horns) clean. This air jet mixes and expands the fluid stream. 5), the space between the fluid nozzle and the air cap, provides a column of air that surrounds the fluid stream. Note: This refers to air atomizing spray guns (not airless or external air mix). Devilbiss offers special air caps for a variety of applications, such as HVLP air caps or air caps for particularly heavy (high viscosity) materials. There are different types of air caps available to produce different sizes (= different pattern widths) and pattern shapes (e.g. The air cap then directs the compressed air into the fluid stream to atomize it, form a specific spray pattern, and deliver the fluid particles to the product surface.
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