... CF8,CF8M.Stem 416,420,316Seat NBR,EPDMSuitale medium Sewage, Sea water, Air, Foodstuff Beverage or OilThese products are widely used ... in water source projects, urban water supply and drainage, sewage treatment, electric power, ... or cutting off liquids in pipelines.Medium available include water, sewage, sea water, air, foodstuff and oil.