What is the recommended setting for material control valves during setup?

The recommended setting for material control valves during setup generally emphasizes the idea of achieving optimal flow while ensuring enough material is available for application without excessive overspray or wastage. Setting the valve to 5 to 6 full turns open from fully closed typically allows for a sufficient flow rate of material, which is crucial for achieving a good finish.

This setting strikes a balance, providing enough material to adequately cover the surface without leading to problems such as runs or drips that can occur with higher flow rates. It also helps to minimize the potential for air being sucked in or for inconsistent spraying patterns, thus enhancing the overall quality of the paint application.

In contrast, settings that are too open or too closed can hinder the effectiveness of the application process, leading to either a lack of material transfer to the surface or an excess that can cause defects in the finish. This makes the 5 to 6 full turns open an ideal guideline for many painting and refinishing processes, promoting both efficiency and quality in the application.