How To Identify The Number Of Hydraulic Valves?

The directional control valve is the reversing valve, which prevents and guides the oil to flow in and out of the passage in the specified direction in the hydraulic system, that is, it plays the role of controlling the flow direction of the oil in the oil circuit. There are two important concepts in the reversing valve, namely position, and pass. Position means that the reversing valve spool has several working positions, which are indicated by squares in the schematic diagram; pass means there are several oil inlet and outlet ports, and the oil inlet and outlet ports are indicated by arrows in the schematic diagram. So how to identify the number of Hydraulic Valves ?

Two-position (left, right) and three-position (left, right, and center) are more common in hydraulic reversing valves. The flow direction of oil is different in each working position; There are several oil pipes connected to the valve, and the common ones are two-way, three-way, four-way, and five-way. Several squares represent several valves, and several oil ports represent several valves, which together are called several valves. Such as a two-position two-way valve, three-position four-way valve.