... 1.Industrial high speed dissolver 2.low speed Scraper for vicious paints and ... of hollow shafts which installed low speed scraper, and this low speed scraper can get the ... and ABB motor are optionalSpeed inverterAn AC Frequency inverter installed in a panel controls the RPM of ... Main motors on off, ammeters, voltmeter, emergency stop, inverter trip, indicating lamps, speed control switch, RPM indicator ...