Use Operation model selectable tester valve is a full-opening, annulus pressure operated valve which can be multi close-open. The ball valve could be locked at open position at any time during....
See more »Yuanheng was founded in 1994 and located in the new technical development area of Baoji, Shaanxi province, covering an area of 6350 sqm. With a professional team of 120 people, Yuanheng is....