Pilot-operated directional control valve

摘要

A valve body of a main valve comprises a first and a second body portions, and grooves and shallow dents are formed in both body portions to form pilot fluid channels and a plug chamber in which a switching plug is accommodated. The switching plug that switches a directional control valve between the internal and external pilot types is accommodated in such a way that its axial direction can be changed by 180 DEG .