... -class600 Wafer butterfly valve Size:2''-48'' Class 150-class600Wenzhou ONO Valve CO.,Ltd is a professional manufacturer of valve.Our products include ... ,safety valves,ball valves,butterfly valves,diaphragm valves,mud valve ect.And it has complete inspection equipment, such equipments ... valve1,With 3D Eccentric structure ,the sealing ring of valve body adopts a multi-level structure of flexible eyelet ...