Spreader Adjusting Valve

Last Updated: May 15, 2020

Definition - What does Spreader Adjusting Valve mean?

A spreader adjustment valve is a spray gun component used to regulate the size of the spray pattern, and is usually a dial or knob located at the back of the gun. By turning the dial clockwise or counterclockwise, the operator can change the pattern of the paint emitted from the nozzle. It is essential to have the spreader adjustment valve at the correct setting because the spray pattern heavily influences the quality of the paint or coating job.

Corrosionpedia explains Spreader Adjusting Valve

The spray pattern for a particular job is governed by several factors, including the shape of the workpiece, the desired paint consistency and the properties of the paint material.

Improper spray patterns due to incorrect spreader adjustment valve settings can result in several issues, including:

  • Heavy center pattern – A heavy center spray pattern is characterized by a high concentration of paint at the center of the pattern. This can occur if the spreader adjustment valve is set too low.
  • Split spray pattern – Split spray patterns are characterized by high concentrations of paint at the upper and lower ends of the spray pattern. This defect can occur if the valve setting is too high.
  • Inability to obtain a round spray – If the spreader adjustment screw is not seated properly, the spray gun may be unable to generate a round spray pattern.
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