WARNING
Always turn off the power, air, and fluid supply to the gun, and trigger the gun to relieve system pressure before installing or removing the air cap/fluid nozzle assembly. This will help reduce the risk of serious injury, including splashing in the eyes or on the skin, or electric shock.
NOTE: Refer to your air spray gun instruction manual to install the air cap and fluid nozzle. If you do not have a copy of the manual, copies are available at no charge from Graco Inc.
Terms
Viscosity
Light: 20 centipoise at 21_C (70_F)
Medium: 70 centipoise at 21_C (70_F)
Heavy: 160, 260 centipoise at 21_C (70_F)
High Solids: Over 360 centipoise at 21_C (70_F)
Centipoise = centistokes x fluid specific gravity.
NOTE: Refer to the Viscosity Conversion Chart on the back cover to convert to other units of measure- ment.
Fan Pattern Production Rate
Light Production: Fluid flow of up to 200 cc/min. (7 oz./min.)
Medium Production: Fluid flow of up to 400 cc/min. (14 oz./min.)
High Production: Fluid flow of up to 600 cc/min. (20 oz./min.)
Round Pattern Production Rate
Light Production: Fluid flow of up to 150 cc/min. (5 oz./min.)
Medium Production: Fluid flow of up to 200 cc/min. (7 oz./min.)
How to Use the Fluid Nozzle Graphs
KEY
260 Centipoise Fluid
160 Centipoise Fluid
70 Centipoise Fluid
20 Centipoise Fluid
Use the procedure below to select the proper fluid nozzle for your application.
1.For each of the fluid nozzle graphs, find the point on the graph corresponding to your desired fluid flow rate and viscosity. Mark the point on each graph with a pencil.
2.The thick vertical line in each graph represents the target flow rate for that nozzle size. Find the graph that has the marked point closest to the thick vertical line. This is the recommended nozzle size for your application. Significantly exceeding the target flow rate may result in lower spray perfor- mance due to excessive fluid viscosity.
3.From the marked point, move across to the vertical scale to find the required fluid pressure. If the required pressure is too high, then use the next largest nozzle size. If the fluid pressure is too low (< 0.35 bar, 3.5 kPa, 5 psi), then use the next smallest nozzle size.
