Gala offers the integration of the screen changer into the pelletizing process if filtration and homogenization of plastic melts is desired.
The screen changer comprises a hydraulically controlled double piston for continuous operation or a single piston for discontinuous operation. The piston is provided with openings for filter packs through which the melt passes. When the filter becomes clogged, which is signaled by rising pressure, one piston is pushed out and the filter screen is accessible for replacement while the second screen is operative so the production can continue without interruption.
Another variant is the start-up screen changer, which also incorporates the function of a polymer diverter valve. The size of the selected screen or start-up screen changer depends on the requirements of the application.