BITING PREVENTING SLID BEARING

摘要

PROBLEM TO BE SOLVED: To provide a biting preventing slide bearing for a slow closing check valve wherein a shaft of the slow closing valve and the bearing is not fixed even when foreign matters come in, and the work for removing the foreign matters is not required. SOLUTION: The slow closing check valve fitted for preventing backward flow of fluid flowing in a pipe passage. The slow closing check valve is usually opened and is slowly closed by slowly and slidably lowering a lower side shaft 23 of shafts provided at both sides of the slow closing valve and inserting the lower side shaft 23 into the tubular slide bearing 2 when the backward flow is generated in the pipe passage. The shaft 23 is lifted to the previous position when there is no backward flow. A plurality of contacting parts 41 (three pieces) protruding to a circumferential direction are provided on the slide bearing 2. Therefore, the slide bearing 2 and the shaft 23 are partially contacted and slidably supported only by a plurality of the parts (three pieces) protruding to the circumferential direction.