... / 2 "- 6"4) Standards: ISO, DIN, SMS, IDF, 3A5) Seal Ring: Silicon rubber, EPDM or FPM6) Application: Pharmacy, beer, food, dairy ... , beverage, cosmetic, chemical industryAs a professional manufacturer, we can offer all kinds of the pipe fittings and can manufacture them according ... , Union, Clamps, Sightglass, Cleaning balls and so on. concentric reducer(all size)