... temperature resistance c. Excellent weather and water resistance Double Flange Butterfly Valve: SizeDN40 - DN1400Design StandardAPI 609End flangeEN1092 ... ,SS420,SS431,SS316SeatNBR,EPDMSuitale mediumSewage, Sea water, Air, Foodstuff and OilThese products are widely used in ... metallurgy industries.Suitable Medium:Water, sewage,sea water, air, foodstuff, oil etc.Working Temperature:-10°C~150 ...