Siemens B320FB-SA226.21K BFV 3W 20" 150PSI 120VAC 2 POS HTR CONFIG BSiemens B320FB SA226. 21K BFV 3W 20" 150PSI 120VAC 2 POS HTR CONFIG BStandard Temp Industrial Butterfly Valve Assembly, 3 way, 20 inch, 150 psi, 120 Vac, 2 position, Heater, Configuration B Additional Information Valve Size20 in Flow Coefficient, Cv7144 Valve TypeThree way Valve Body StyleRotary Butterfly Port Configuration3 Way End ConnectionLug Material, valve bodyCast Iron Trim MaterialStainless Steel Butterfly DiscFull Cut Disc Configuration