The Remote Control Systems are utilized by an abrasive blasting operator for starting up and shutting down the Sand Blaster Machine. The remote control system includes a remote control valve and remote control DMS (dead man switch), which are attached by a twin tube.
The control switch often referred to as a dead man switch, is the trigger for the Remote Control Valve System. When the operator releases the Remote control handle, the Sand Blasting machines deactivate, stopping air and abrasive flow through the sand blasting nozzle.
The Remote Controls operate pneumatically. If the operator is not pressing the dead man switch, one stream of air travels down the outbound side of the twin line and escapes through an opening located under the lever. The usually closed inlet valve remains closed, and the usually open outlet valve remains open.
When the dead man switch lever is pressed, the opening is sealed, and air in the outbound line returns through the inbound line to open the inlet valve and close the outlet valve. This action pressurizes the Sand blasting machine and begins the Sand Blasting process. Freeing the handle puts the machine in exhaust mode, which closes the inlet valve, and opens the outlet valve to depressurize the Sand Blasting machine and stop the blasting.
Pneumatic remote controls work great in blasting operations with blast pipe lengths less than 100 ft.
