| 摘要 |
PROBLEM TO BE SOLVED: To provide a directional control valve device capable of controlling the large flow rate of operation fluid and capable of switching it at a high speed and high accuracy. SOLUTION: In the directional control valve device 51, a sleeve 52 is constituted such that a bush 56b having a first valve seat 64 and a bush 56a having a second valve seat 65 are detachably attached to each other. A spool 53 is fitted in an output passage 62 between the valve seats 64, 65 and has a spherical poppet part 68 seatable on the overall peripheries of the valve seats 64, 65. The spool 53 is axially displaceably provided in the sleeve 53 and the sleeve 52 and the spool 53 are formed such that a fluid force applied to the spool 53 is made smaller. Thereby, the switching of a feed passage 63 and a drain passage 59 against an output passage 62 of the operation fluid can be carried out at a high speed high accuracy. A sleeve 52 with a divided structure having a high concentricity at an area for guiding the spool 53 can be formed.
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