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Understanding Airless Spray TipsAn airless spray tip can influence the operation, efficiency and overall effectiveness of an airless spray system. A painter is likely to judge the performance of the pump by the performance of the tip. The tip controls the spray pattern, pattern size, and paint flow. It actually tells the system how hard to work. The tip is a key system component. Understanding Tips The relationship of the tip opening (orifice) to spray pattern size is: Given a constant width (fan), the larger the orifice, the more material the sprayer will apply. (A larger orifice means greater paint flow.)
Given a constant orifice size, an increasing fan width will apply a thinner coating of material to the surface because a given amount of material is distributed over a larger area.
Sizing a Spray Tip U.S. manufacturers typically use three numbers to designate tip size, as in 517 or 211. The first digit refers to fan width and is one-half the size of the working fan width. The second and third digits refer to orifice size in thousandths of an inch; thus, the 17 in 517 refers to an orifice size of .017 inches. The following examples illustrate the tip numbering convention: Tip Number Fan Width Orifice Size 211 4 inches .011 inches 417 8 inches .017 inches 527 10 inches .027 inches Most reversible tips are stamped with the size for easy reference. 5 = 10" fan pattern at 12 inch spraying distance 17 = 17 thousandths orifice size |
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