... .High temperature resistance c. Excellent weather and water resistance Double Flange Butterfly Valve: SizeDN40 - DN1400Design StandardAPI ... ,C95500StemSS416,SS420,SS431,SS316SeatNBR,EPDMSuitale mediumSewage, Sea water, Air, Foodstuff and OilThese products are widely ... shipbuilding, medicine and metallurgy industries.Suitable Medium:Water, sewage,sea water, air, foodstuff, oil etc.Working Temperature ...