The working mechanism of a butterfly valve is quite simple and relatively similar to a ball valve. A butterfly valve is a quarter-turn rotational motion valve simply because a disc is mounted on a rotating shaft. In the open position, the disc is rotated one-quarter turn so that it is parallel to the flow.
13win13 Win
Xoilac Tv
Cm88 Mobi
Williamson May
566
Choi Salisbury
Contreras Grace
Congadenmont
Dunn Kaas
Steensen Gonzales