PRESSURE CONTROL VALVE AND CONTROL VALVE

摘要

A pressure control valve includes a main valve unit provided with a main valve element and a valve housing body having a main valve seat capable of seating the main valve element and having a pilot chamber for slidably housing the main valve element. A pilot valve unit is provided with a pilot valve element and a pilot valve seat member has a pilot valve seat capable of seating the pilot valve element and separating the pilot valve element from the pilot valve seat and opening when a pressure in the pilot chamber exceeds a predetermined pressure. The pressure control valve is configured with recessed (concaved) parts that form hydraulic fluid channels between the pilot valve seat member and the pilot valve element when the pilot valve unit is in an open-valve-state at three or more locations so as to be separated by equal angles. Each recess has the same shape.