Control valve

A control valve comprising:

• a body having an internal passage through which a working fluid flows;
• a valve hole provided in the internal passage;
• a driven member configured to open and close a valve section by touching and leaving the valve hole;
• a guide member configured to slidably support the driven member inserted thereto;
• and
• a shield part, provided in the driven member, configured to close one end opening of a spacing between the driven member and the guide member when the valve section is fully opened,
• wherein the shield part is provided in an end of the driven member on a side exposed from a sliding portion of the driven member relative to the guide member when the valve section is closed,
• wherein as the driven member is displaced in a valve opening direction, the shield part becomes seated on an end surface of one end side of the guide member, and further displacement of the driven member in the valve opening direction is restricted when the valve section is fully opened,
• wherein after the driven member starts opening until the shield part becomes seated on the end surface, a pressure difference between the one end opening and another end opening of the spacing allows the working fluid to leak from the one end opening toward the other end opening, and
• wherein when the valve section is fully opened, the shield part closes a space formed between the driven member and the guide member from outside by touching the end surface of one end side of the guide member.