| 摘要 |
PURPOSE: To regulate accurately fuel pressure to a set pressure while improving the durability. CONSTITUTION: A housing H is divided into a spring chamber 1 and fuel chamber 2 by a diaphragm F and a valve seat hole 5 communicating to a fuel return path 4 is opened to the fuel chamber 2. A ball valve 6 disposed in the fuel chamber 2 is disposed between the valve seat hole 5 and the lower side retainer 20 disposed on the lower surface F2 of the diaphragm F to control the opening of the valve seat hole 5. The lower side retainer 20 is formed with an annular recess 20B projecting to the spring chamber 1 side. An annular abutting surfaces P of the ball valve 6 and an end 20B of an annular recess 20A are adapted to abut against the other peripheral surface above the center C of the ball valve 6 and inward of the diameter D of the ball valve 6. |
