| 摘要 |
PURPOSE:To obtain a highly precise control of dischage by providing a seat receiving part respectively at the end of a spool valve and one among of a valve body, the other valve, and a pressure-receiving member for moving the spool valve smoothly. CONSTITUTION:Seat parts 43 and 44 of a spring 41 are covered in a part of about one wind of a spring main body 42 with a member of synthetic resin and the like, and the covered part is shaped in one body into a disk. The end of a spool valve 3 on which one end of the seat 43 of the spring 41 is placed is provided with a concave seat receiving part 33d to correspond to the seat part 43, and one end of the spring 41 is placed on the spool valve 33. To fit the seat part 43 in the seat receiving part 33d. The end part of a hole 32 of a valve body 31 constructs the seat receiving part 31a of the valve body 31. The spring 41 gives force to move the spool valve 33 to the right against the pushing pressure of three liquid chambers 34, 35 and 36. |
