Important Spray Gun Cleaning Tips

- by Jorge Flores, Marketing Coordinator / Customer Service


One of the biggest problems we see when repairing spray guns is improper maintenance. Proper maintenance and cleaning is ESSENTIAL if you want to get the most life out of your spray equipment, which in turn equates to saving time and money. In this two-part blog series, I will discuss the proper procedure for cleaning and maintaining your spray equipment. There are slightly different techniques to do so depending on what type of gun you are using; manual or automatic. This article will focus on manual spray guns and the following will focus on automatic spray guns. Note that depending on the material you are spraying, there may be slightly different cleaning intervals that will have a dramatic effect on the reliability and efficiency of the spray gun throughout its usage cycle. Remember to always check the material manufacturer's instructions for further guidance.


General Cleaning Steps:
For simple cleaning, the gun DOES NOT need to be dismantled.

  1. Fill the cleaned material container / gravity-feed cup / siphon-feed cup, suspended / pressure-feed cup, or cleaned material pressure tank with a cleaning solution that is compatible with the material you are spraying.
  2. Operate the spray gun as normal.
  3. Do not stop spraying until you see CLEAR cleaning solution exiting from the nozzle.
  4. Disconnect the material and allow the atomizing air to flush out any remaining cleaning agent.

This simple 4-step process take only minutes to perform and will dramatically improve the life and reliability of your spray gun.

When choosing cleaning agents remember to ONLY use agents that have been recommended by the material manufacturer and that do not contain the following:

  • halogenated hydrocarbons (e.g. 1,1,1-trichloroethane, methylene chloride, etc.)
  • acids or acidic cleaning fluids
  • regenerated solvents ("cleaning thinners")
  • paint removers

Agents containing these ingredients can cause chemical reactions on electroplated components which will result in corrosion damage.


Cleaning Intervals:

  • before changing to a different spraying material
  • at least once a week
  • depending on the material used, usage patterns, or the degree of fouling; several times a week

Following these simple steps will allow you to realize the longest life and reliability out of your spray equipment. This will save you money and ensure that you will be spraying efficiently for years to come.