Europe CE approval,membrane confirm to FDA ROHS PAHS TUV also can be used in RO Water System. Brand:BestTankBestMembrane HighqualityHydrophoreandExpansionTankswithReplaceableEPDMButylNautralrubberMembrane. CarbonSteel,Stainlesssteel,EuropeandUSstandards,workingforhighqualitypumpandheatwatersystem Model:2L5L8L19L24L36L50L80L100L150L200L300L500L750L1000L1500L2000L2500L3000L5000L10000L. MAXIMUM OPERATING PRESSURE(BAR) 8BAR 10BAR 16BAR 25BAR (LT) ProductCode Operation Pressure (BAR) Pre-set Pressure (BAR) Diameter L(MM) Height H(MM) Connection Membrane 2 BHT-2D 8 1 100 270 1/2'' EPDM 8 BHT-8D 8 1 200 360 1'' EPDM 12 BHT-12D 8 1 200 390 1'' EPDM 24 BHT-24K 10 1.5 350 410 1'' EPDM 24 BHT-BK 10 1.5 350 325 1'' EPDM 24 BHT-D 10 1.5 300 430 1'' EPDM 50 BHT-A 10 2 350 610 1'' EPDM 60 BHT-A 10 2 375 650 1'' EPDM 50 BHT-50D 10 2 350 760 1'' EPDM 60 BHT-60D 10 2 375 870 1'' EPDM 80 BHT-80D 10 2 425 930 1'' EPDM 100 BHT-100D 10 2.5 450 990 1'' EPDM 150 BHT-150D 10 2.5 520 1080 1'' EPDM 200 BHT-200D 10 2.5 590 1120 11/4'' EPDM 300 BHT-300D 10 2.5 640 1250 11/4'' EPDM 500 BHT-500D 10 2.5 750 1490 11/4'' EPDM 750 BHT-750D 10 3 800 1920 2'' EPDM 1000 BHT-1000D 10 3 800 2150 2'' EPDM 1500 BHT-1500D 10 3 960 2350 2'' EPDM 2000 BHT-2000D 10 3 1100 2450 2'' BUTYL 2500 BHT-2500D 10 3 1100 2700 21/2'' BUTYL 3000 BHT-3000D 10 3.5 1250 2700 21/2'' BUTYL 5000 BHT-5000D 10 3.5 1500 3100 3'' BUTYL 10000 BHT-10000D 10 3.5 1600 5900 3'' BUTYL