Great Transfer Efficiency (GTE)

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A new way of painting

Reduce overspray

Conventional rotary bell spraying has improved the efficiency and capabilities of the painting process. With fewer robots required, paint shops have become more compact, but this demands faster motion to cover the entire surface within short cycle times. As a result, paint flow rates have increased.
However, higher flow rates lead to lower transfer efficiency—meaning less paint ends up on the part compared to the amount purchased. The main cause is overspray, which occurs during the transfer of paint from the bell to the part.

Overspray results in:

  • Daily paint waste
  • Contamination of robots, walls, and rails, requiring frequent cleaning
  • Increased conditioned air volume (~1,000 Nm³ per vehicle) to maintain booth temperature and humidity
  • Surface quality issues caused by dried paint droplets

The solution for Great Transfer Efficiency (GTE):

Reduce application distance, rotary speed, robotic speed, and high-voltage settings. This allows you to lower paint flow and save material.

Lower energy for droplet formation can affect paint film quality (e.g., sagging, pinholes, orange peel). The new GTE bell cup system solves this by maintaining appearance quality while operating at lower speeds, shorter distances, and reduced voltage—cutting overspray by up to 50%.

How GTE works?

Role of each part to keep high finishing

The GTE air shroud is using less air than SW or NW air shrouds, to keep a wide pattern and reduce the speed of the air, which avoids rebounding on the surface to paint.

You save around 30% of compressed air.

The GTE bell cup has a high serrated design, with larger diameter compared to standard SW bell system. This larger bell cup compensates the lower rotation speed, and the highly serrated design compensates for the lower energy given to generate small droplets.

To summarize, the bell cup gives the finishing quality, while the air shroud allows for a higher transfer efficiency. 

Upgrade your PPH 707 or Accubell 709 EVO

  • Retrofit kit available for PPH 707 SB/2K/MT are including only bell cup + air shroud. 
  • No need to change GNM and UHT: Existing ATEX certification covers this GTE process as well. 
  • Available with EC65 GTE bell system for clear coat and primer exterior body painting.