| 摘要 |
PURPOSE: To mass-produce inserts so as to reduce manufacturing cost by making adjustable the dimension of an outlet aperture by a pre-setting insert and arranging a valve seat and the outlet aperture at a level equal to an external screw thread. CONSTITUTION: The dimension of an outlet aperture 10 is made adjustable by a pre-setting insert 14. A valve seat and the outlet aperture 10 are arranged at a level equal to an external screw thread 11. A flat portion 15 is provided in the part of a valve insert housing 6 in the vicinity of the outlet aperture 19. The flat portion 15 interrupts the screw thread 11. Thus inserts are mass-produced to reduce manufacturing costs. |
