To provide a flow passage selector valve with a shorter axial length.
On the peripheral wall 32 of a housing 31, an input port 33; the first input/output port 34; and the second input/output port 35; are formed by penetrating the peripheral wall 32. On the outer peripheral wall of a spool valve member 40, an input passage 41 and an input/output passage 42 are formed. The width d2 of the peripheral wall 32 partitioning the first input/output port 34 and the second input/output port 35 is the same as the width d1 of the input port 33 or less than that, while the width of the input/output passage 42 is narrower than the width of the input passage 41. Furthermore, since a ball 52 is fitted to a groove recessed part 36 farmed to the housing 31, and the groove recessed part 46 formed to the spool valve member 40, the rotation of the spool valve member 40 is prohibited to the housing 31. As a result, the axial length of a flow passage change-over part 30 can be made shorter.
IWASAKI KAZUTOSHI
HATTORI ISAO
KIDA YOSHITSUGU
