Group: Graco
Catalog excerpts
Always apply the right amount of powder! The patented Digital Valve Control (DVC) technology ensures precise and reproducible powder output regulations and improves the film thickness consistency. powder output coating results © 2015 by Gema Switzerland GmbH - All rights reserved.
Open the catalog to page 1DVC technology: how does it work? Venturi injector are very important to achieve stable powder output and good coating results. Digital Valve Control (DVC) is OptiStar gun control. The flow OptiFlow injector is regulated by motor driven valves. © 2015 by Gema Switzerland GmbH - All rights reserved. Motor-driven valves
Open the catalog to page 2DVC technology: how does it work? ● In each motor-driven valve a stepper motor axially moves a conical needle into an orifice and precisely regulates the size of the opening for the flow of compressed air. ● Each stepper motor position corresponds to an air-flow value and is stored by a micro-processor. Stepper Motor ● Airflow regulations are extremely precise and reproducible with no hysteresis variations. Orifice Needle © 2015 by Gema Switzerland GmbH - All rights reserved.
Open the catalog to page 3Precise Powder Output ● DVC technology allows extremely precise powder output regulations. ● It is very easy for every powder coater to find the right application settings for each powder / object and store them for future use. ● The control unit periodically recalibrates the motor-driven valves. This happens automatically, without any manual intervention. ● Powder output regulations remain very stable over time. © 2015 by Gema Switzerland GmbH - All rights reserved.
Open the catalog to page 4Powder Savings ● Thanks to the DVC technology it is easy to precisely regulate the powder output of all the guns at the same value. ● This results in a more uniform powder distribution on the surface, and consequently in very significant powder savings. © 2015 by Gema Switzerland GmbH - All rights reserved.
Open the catalog to page 5Reproducible coating results ● Thanks to their DVC technology, the motor-driven valves precisely reproduce the exact same settings for a long time, without any hysteresis problems. ● The application parameters can be easily stored in the OptiStar modules and recalled whenever needed. ● The periodic automatic recalibration of the motor driven valves ensures precise settings for the longest time. ● Reproducible coating results are essential to achieve a consistent application quality and to save powder. © 2015 by Gema Switzerland GmbH - All rights reserved.
Open the catalog to page 6All Gema Switzerland catalogs and technical brochures
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