... -DN300Standard: DIN, SMS, 3A, ISO, IDF, RJT Gasket material: Silicon, EPDM, Viton , NBR, FPM, which all confirm to standard of FDA ... . Connection: Weld, clamp, thread, single weld single thread, flange Handle: 2-position handle, 3-position handle, 4-position handle ... of axial movement into 90 degree so that it controls butterfly valve. Performance: 1. Disc is producing by the import CNC machine ...