To choose the right spray tip, requires the consideration of several key factors, such as the material thickness, the sprayer's maximum flow rate and the best fan size for the project. Being able to identify when a tip is worn and replacing the tip at the right time will also improve the finish quality and project devleoment time.
For optimum performance, the sprayer must have a maximum flow rate higher than the flow rate of the tip, to be sure the flow rate of the tip is less than the maximum flow rate of the sprayer unit.
Why use a tip with a lower flow rate?
The tip slowly wears and the orifice becomes larger, resulting in an increase of coating flowing throught the tip and onto the work area. This can lead to an uneven coating of the surface and excess usage of coating material which adds to the overal project cost.
Why is spray pattern fan width also required?
The width of the spray pattern, known as the fan width, determines the area covered with each pass. For a given tip orifice, a wider fan delivers a thinner coat, less defined spray pattern, more over spray and faster coverage on broad, open surfaces. A narrower fan delivers a thicker coat, more defined spray pattern, less over spray and better control when spraying small or confined surfaces.
To maximize productivity and lower labor costs, choose a tip with the right fan size. In general, a spray tip with a larger fan size increases production with less control, and a smaller fan size decreases production with more control.