Powder spray coating arrangement has variable choke control element in delivery airline whose flow resistance can be varied by control motor activated by electronic regulator

摘要

The arrangement has an injector (4) with a low pressure region (10) for sucking powder from a powder source. The injector system has a delivery air line (20), an electronic regulator (21), a reduced pressure measurement arrangement (30,36,38) connected low pressure region and regulator and a control element (18) in the delivery air line. The control element is a variable choke whose flow resistance can be varied by a control motor (19) that can be activated by the regulator.