When the working process of the reverse pump is pushed back and forth by the main oil cylinder, the S valve (C valve or skirt valve or gate valve) swings reversely, so the concrete sucked by the piston in the concrete cylinder is the ash in the conveying pipe just opposite to the positive pump (the concrete sucked by the positive pump is the concrete in the hopper and then pushed into the hopper to realize desizing)

Function: the anti pump function is used to prevent the concrete from being sucked out of the conveying pipe and pushed into the hopper, so as to prevent the occurrence of pipe blockage.

In theory, the problem of pipe plugging can be solved by re normalizing the pump several times. However, if the pipe plugging is serious before you re normalize the pump after you reverse the pump, the problem of pipe plugging can't be solved by back and forth pump at this time. The worst solution is to dismantle the pipe one by one. If the pressure is high, the pipe plugging will only be intensified.