| 摘要 |
PROBLEM TO BE SOLVED: To reduce slide friction resistance between a metallic slide rod 21 and an annulus packing 24. SOLUTION: This valve comprises a casing 4 having an elastic valve seat 18, the metallic slide rod 21 engaged in a through hole 22 formed with its center to correspond to the center of the elastic valve seat 18, a valve element 31 provided on the slide rod 21 to be movable to/from the elastic valve seat 18, and a circular packing 24 contained in a packing chamber 23 formed in an inner circumferential surface of the through hole 22. In an outer circumferential surface of the slide rod 21, a sleeve 29 of synthetic resin is engaged to slide to the circular packing 24. COPYRIGHT: (C)2004,JPO
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