Check valve

A check valve provided in a bore of a modulator block having an inlet passage and an outlet passage to control one-way flow of oil, comprising:

• a valve housing having an upper portion opened and a seat portion formed integrally with a lower portion of the valve housing and having an inlet port communicating with the inlet passage, and an outlet port communicating with the outlet passage formed around a side circumference;
• a cap configured to seal the upper portion of the valve;
• housing and to be secured to the modulator block;
• a plunger configured to be movable up and down in the valve housing to open and close an internal flow passage between the inlet port and the outlet port;
• an elastic member provided between the cap and the plunger and elastically pressing the plunger against the seat portion;
• a sealing member installed on the plunger and brought into close contact with seat portion when the plunger contacts the seat portion to close the internal flow passage;
• and
• a stopper extended from the seat portion to prevent the sealing member from being caught between the plunger and the seat portion,
• wherein:
• the stopper protrudes toward the plunger along a circumference forming the inlet port,
• a flange extending radially from a lower end of the plunger and contacting the stopper,
• a mounting portion recessed along a circumferential direction is provided on a side circumference of the plunger positioned at an upper end of the flange so that the sealing member is installed, and
• the sealing member installed to mounting portion has a sealing portion protruding lower than the flange.