(1) Function:
Main control valve or multi-way valve, it is a combination valve with two or more reversing reads as the main body. According to the requirements of different systems, overflow valves (safety valves), one-way valves, overload valves, oil supplement valves, etc., which play a role in safety protection, are often combined.
Control the flow, pressure and direction of hydraulic oil.
(2) Working process of single valve
The working process of a single valve
When both sides of the main spool do not pass pilot oil, the main spool is in the neutral position under the action of the return springs at both ends, and the neutral function of the main valve (that is, the entire reversing valve) is determined by the structure of the main spool. If the left end of the pilot valve is connected to the pilot oil, the main spool moves to the right, so that the P port of the main spool communicates with the A port, and the T port communicates with the B port; when the pilot valve is connected to the pilot oil at the right end, the main spool moves to the left , The P port of the main reading is connected with the B port, and the T port is connected with the A port.
