Hydraulic balance valve Excavator hydraulic cylinder valve core CXDA-XAN

The basic structure and working principle of flow control valve
The basic structure of flow control valve mainly includes a valve core, a valve body and a control device that drives the valve core to do relative movement in the valve body.
The structure of the spool has slide valve type, cone valve type and ball valve type; In addition to the valve body hole or valve seat hole matched with the valve core, there are oil inlet, oil outlet and oil outlet of the external oil pipe on the valve body; The device that drives the valve core to do relative movement in the valve body can be a manual adjustment mechanism, or it can be a spring or electromagnet, and in some cases, hydraulic force is used to drive it.
In terms of working principle, the flow control valve uses the relative movement of the spool in the valve body to control the opening and opening of the valve port to achieve pressure, flow and direction control. When the flow control valve works, the port size of all valves, the pressure difference between the inlet and outlet ports of the valve, and the flow through the valve are in line with the port flow formula, but the parameters controlled by various valves are not the same.