| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid valve which materializes excellent surface precision of a valve seat surface, high abrasion resistance and low manufacturing cost. SOLUTION: A normally open solenoid valve 1 consists of a fixed core 3, a movable core 7, a coil 42, a valve element 5 moving integrally with the movable core 7 and a valve seat member 6 having a funnel-shaped valve seat surface 61. The valve seat member 6 has a substantially cylindrical outside shape, includes a valve seat surface 61 on the top surface, a flow passage 62 in a valve seat member forming a part of a flow passage R extending upward from the center of the undersurface 65 and a valve hole 66 for communicating between the bottom of the valve seat surface 61 and flow passage 62 in a valve seat member, and is molded by forging including the valve seat surface 61, flow passage 62 in a valve seat member and valve hole 66. COPYRIGHT: (C)2008,JPO&INPIT
|
