SPRAY GUN TECHNIQUES

TM 43-0139 (b) A pressure-type gun feeds fluid into the air stream (the air cap and fluid tip are flush), by means of applied air pressure that forces fluid from the container to the gun. (4) Airless Spray Equipment. Airless spray equipment uses an electrically operated vibration element which forces the paint up through a tube from the bottom of the container to a nozzle in the cover. This type can be recharged with paint See the manufacturer's instructions for the type of current and voltage required. 5-3. SELECTION OF AIR CAPS. NEEDLES. AND NOZZLES The performance of an air gun with any kind of material depends primarily on the selection of the proper air cap, fluid needle, and fluid tip (or nozzle). Manufacturers identify combinations of these parts intended to be used together, and their recommendations should be followed in respect to the proper combination for a particular material. Occasionally, changing the type of feed will necessitate a different combination of air cap, fluid tip, and fluid needle. 5-4. SPRAY GUN TECHNIQUES WARNING All personnel who work in a spray painting booth must wear a NIOSH approved respirator as well as personal protective equipment (PPE), when spray painting operations are underway. Refer to para 1-7. WARNING Spray painting will be done only in areas designated for that use. All personnel within a paint booth must be equally protected with proper PPE in accordance with para 1-7. No unprotected personnel may enter a paint booth without protection until 30 minutes after all painting/cleaning is completed. WARNING Only one person will spray paint on an item at a time, unless all people are protected in accordance with para 1-7. This is to eliminate the hazard of accidently spraying paint on another person. Figure 5-2. Deleted Change 3 5-3/(5-4 blank)