For the control of the bracket spray system: there is a closed one-way valve between the inlet P and the outlet A; when the hydraulic control port K1 comes under pressure, the water into the P interface can flow through the An interface to spray water; otherwise, the liquid control port K2 is pressed to close and stop spraying water. 

The characteristic of the spray valve is that the spray flow and the liquid-controlled emulsion come from two systems and do not interfere with each other. 

The direction of water inlet and outlet of YZK- 3 and ZPF13 can be reversed.