Solenoid valve for brake system

A solenoid valve for a brake system comprising:

• a filter member accommodated in a bore of a modulator block including an inlet path and a discharge path;
• a magnet core coupled to the filter member and including a through hole longitudinally passing through the magnet core;
• a sleeve coupled to an outer surface of the magnet core;
• an armature installed in the sleeve;
• a valve seat fixed to the through hole and including an orifice;
• a plunger disposed at the through hole to open and close the orifice while vertically being moved by movement of the armature;
• and
• a returning spring configured to press the plunger against the armature,
• wherein a boss inserted into the valve seat through an opening of a lower end of the filter member and including a connecting path configured to cause the orifice to communicate with the discharge path is formed to pass through a center of the filter member, a plunger valve vertically, moved due to a pressure of supplied oil and including a vertical hole formed to pass through a center of the plunger valve is disposed below the connecting path, and a plunger valve seat having a diameter greater than that of a diameter of the connecting path is provided at a lower end of the connecting path to selectively come into contact with an outer surface of the plunger valve when the plunger valve vertically moves.