Remote control of blast pots
In general, blast pots are nowadays only operated via a dead man's handle and a corresponding remote control on the unit. A manual operating system via a ball valve attached to the pot is no longer state of the art and is also no longer permitted for safety reasons.
If an incident occurs (e.g. passing out) and the blaster releases the dead man's handle, the blasting process is interrupted and the pot is exhausted. Depending on the blast hose length and equipment, it can take up to 20 seconds for the blast nozzle to run out of abrasive. This can be reduced to less than one second with the Clemco fast shut-off.
There are two different ways of operating a dead man's handle, one pneumatic and one electric. When the hand lever is pressed, the pneumatic dead man's handle directs air via a remote control hose into the remote control mounted on the pot and thus pressurizes the system.
For longer blasting hose distances from approx. 70 - 100 meters, the use of an electric hand lever is recommended, as the reaction time is significantly reduced, which also speaks for the aspect of safety, but also reduces the consumption of abrasive. An electric control box is placed in front of the remote control, which converts the electrical signal into a pneumatic signal for the remote control and the blasting pot.
More information
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