Water stopper (WS)
serves to prevent water penetration to proportional feeder when the abrasive nozzle is clogged by bigger piece of abrasive or when the water jet is reflecting due to small distance of abrasive nozzle from material during the piercing.
Water Stopper Electronic (WS-E) has an capacitive sensor which turns off ON-OFF valve, abrasive and stops the program, when the water penetrate into the body of feeder, respectively into the WSE.
Mechanical Water Stopper (WS-M) only occurs to prevent from entering into the feeder, anyway the water, abrasive and the movement of the machine still continues. Everything must be turned off by the operator.
