... SUS316L Standard: ISO, DIN, 3A, SMS, IDF Sanitary Clamped Butterfly Valve Connection mode: Clamped Specification: 1"-4", DN25-DN100 Material ... Working principle: Remote-controlled operation by the driving gear or manual operation by the handel Three drive forms: Normally closed, ... professional manufacturer, we can offer all kinds of the sanitary butterfly vlaves and can manufacture them according to ...