| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a valve integrated pump unit which can switchover the operation flow of a fluid while relieving the pressure fluctuation. SOLUTION: In a valve integrated pump unit equipped with a flow direction switchover valve 3, which is equipped with flow direction control position 'a' and 'b' for selectively connecting the first path A and the second path B against the pump discharge passage C and the pump suction passage D, and center position 'c' to stop the communication with tie first passage A and the second passage B against the pump discharge passage C and the pump suction passage D, a flow direction switchover valve 3 is at least equipped with a bleed path E to connect the pump discharge passage C and the pump suction passage D through a restriction at the center position 'c'.</p> |
