| 摘要 |
PROBLEM TO BE SOLVED: To provide a check valve element capable of efficiently supplying fluid while inhibiting occurrence of chattering.SOLUTION: A check valve element (48) is arranged in a downstream side fluid passage (42) extended to the downstream side from a valve seat (36) having an opening into which fluid is introduced so as to be displaceable to the upstream side and the downstream side, and is abutted to the valve seat by pre-closing and energizing force toward the upstream side. The check valve element includes a fitting part (48d) provided on an outer peripheral surface (48b) thereof, a sliding resistance imparting member supporting part (48b-1) supporting a sliding resistance imparting member (52) so that the sliding resistance imparting member slides with a wall of the downstream side flow passage when the check valve element is displaced to the upstream side and the downstream side, and an energizing member supporting part (48b-2) supporting an energizing member (50b) energized to the upstream side so that an outside diameter of the sliding resistance imparting member is increased while the sliding resistance imparting member is fitted to the fitting part (48d) by the energizing member energizing the sliding resistance imparting member to the upstream side. |
