| 摘要 |
PROBLEM TO BE SOLVED: To provide a lining type butterfly valve having anticorrosion against fluid, ensuring a large amount of flow rate, exhibits assembly easiness, capable of surely preventing fluid leakage to a flow passage direction on a disk lower part side or outside, and excellent in operability.SOLUTION: A disk 3 is rotatably provided while boss surfaces 37, 38 of upper and lower parts slide through an upper stem 4 on the inner periphery of a resin sheet liner 10 coating an inner peripheral surface 7 of a cylindrical body 2. The disk 3 has: a substantially circular core grid 30 and a small projection part 31 provided at the lower part of the core grid 30, which are coated with resin lining 32; and a bottom stem part 35 coated with the resin lining 32. The bottom stem part 35 is supported in a non-penetrative manner to a mounting cylinder 12 provided at the lower part of the body 2.SELECTED DRAWING: Figure 2 |
