Chad's Top Tips - Check your filters!

Check your filters!

In the world of spray machines, filters are the unsung heroes. Often overlooked, they play a critical role in filtering out unwanted bits and debris to ensure the smooth operation and longevity of the equipment. From the main pump filter to the smallest gun filter, each component serves a vital function in maintaining the quality of the spray and preventing costly downtime. In this blog, we'll delve into the benefits of checking and cleaning filters in spray machines, focusing on the main pump filter, strainer, and gun filter.

The Strainer or Suction Filter:

The strainer, or suction filter, is the first line of defence. Located at the bottom of the wet end/pump. The strainer serves a similar purpose to the main pump filter but targets larger particles in the paint.

Here's why checking and cleaning the strainer is crucial:

  1. Preventing Damage:

 Quite often when working on a site cleanliness is an issue. With multiple tradesmen on site and in the same environment its possible for bits & debris to drop into the paint bucket you are sucking out of. The strainer is the first line of defence, preventing your sprayer from sucking up unwanted bits.

By removing contaminants from the fluid stream, the strainer helps prevent damage to sensitive pump components such as seals, valves, and pistons. This extends the lifespan of the pump and reduces the likelihood of costly repairs.

  1. Protection for Pump and Components:

By intercepting debris before it reaches the pump, the strainer safeguards critical components from damage, reducing the risk of costly repairs and downtime.

  1. Improved Performance:

A clean strainer optimizes fluid flow, preventing pressure fluctuations and ensuring consistent spray performance across different applications.

The Main Pump Filter:

The main pump filter typically screens out smaller particles such as dirt, debris, and rust before they can enter the pump system. Over time, these particles can accumulate and clog the filter, leading to reduced pump performance and increased can cause a reduction in paint flow and even split the filter, under pressure.

Regularly checking and cleaning the main pump filter is essential for several reasons:

  1. Maintaining Pump Efficiency:

A clean filter allows the pump to operate at peak efficiency by ensuring proper fluid flow. A clogged filter restricts flow, causing the pump to work harder and increasing the risk of overheating. The filter may even break under pressure due to dry paint and lead to: tip blockages, an increase in gun and tip wear and blockages in your fluid hose.

  1. Fina Particle Removal:

The main filter captures fine particles that can cause nozzle clogging and affect spray quality. Regular maintenance prevents buildup and ensures uninterrupted operation.

  1. Improved Performance:

A clean main filter optimizes fluid flow, preventing pressure fluctuations and ensuring consistent spray performance across different applications.

  1. Ensuring Quality Spray:

Clean fluid, free from debris ensures a consistent spray pattern and uniform coverage, essential for achieving professional results in various applications, from spray painting spraying textured materials such as plaster and render.

The Gun Filter:

At the final stage of filtration, the gun filter plays a pivotal role in ensuring the integrity of the spray pattern and protecting the spray gun from blockages. Positioned at the gun's inlet (handle), this filter removes any remaining particles that could compromise the finish or cause equipment malfunctions.

Consider the following benefits of checking and cleaning the gun filter:

  1. Consistent Spray Quality:

A clean gun filter prevents particles from obstructing the nozzle, maintaining a uniform spray pattern and preventing spitting or uneven coating.

  1. Extended Equipment Life:

By preventing debris from entering the gun assembly, the filter helps prolong the lifespan of the spray gun and reduces the need for premature replacements.

  1. Reduced Maintenance Costs:

Regular filter maintenance minimizes the risk of costly repairs associated with nozzle blockages and gun malfunctions, saving both time and money in the long run.

Conclusion: So, what now?

Filters are indispensable components of paint and plaster spray machines, safeguarding pumps, nozzles, and other vital parts from the damaging effects of contaminants. By regularly checking and cleaning the strainer, the main pump filter and gun filter, users can ensure optimal performance, prolong equipment life, and achieve consistent, high-quality spray results across various applications.

If you hire or purchase a machine from us, we will advise on the right filters to use. Filters will be determined by the machine, the material you are spraying and therefore the tip size.

Don’t forget you can also call us or fill in the enquiry form to book in a service and proactively maintain your spray equipment. Should the worse happen, book your machine in for repair and maintenance. If your filters have been working hard and seen better days, you can also purchase them on the Spray Plant website by visiting the filters and strainers page.

Don't underestimate the importance of these unsung heroes – they may just be the key to unlocking the full potential of your spray equipment!


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