A BUTTERFLY VALVE WITH ADJUSTABLE DISK METAL SEAT

摘要

A butterfly valve with an adjustable metal sheet is provided to solve a conventional problem of exchanging a disk metal sheet due to wear of the disk metal sheet. A butterfly valve includes a body(3) in which a body metal sheet is installed and a disk(5) in which a disk metal sheet fixed by an engaging screw makes contact with the body metal sheet. A regulation screw hole is formed at a circumferential end of the disk metal sheet. A regulation screw(10) is engaged by bring an end of the regulation screw hole into contact with the disk. The disk metal sheet is separated from the disk to make contact with the body metal sheet by regulating the regulation screw.