The ACS is a separate control that used to operate an air-actuated abrasive metering valve. The ACS closes the metering valve independently of the blasting, so air without abrasive exits the nozzle. This feature permits the operator to shut off the abrasive flow for clearing the blast hose and for blowing down the surfaces after blasting. If an application requires frequent choking of the blast machine, the line could control a valve to remotely choke the machine.
The pneumatic ACS switch is mounted on the control handle. A separate air line connects to the ACS switch to operate the valve. Refer to the remote control systems manual for instructions.