Heat Exchanger Brazed Plate Double Wall Max BtuH (Water to Water Application) 317 243 BtuH Max BtuH (Oil to Water Application) 78 000 BtuH 435 PSIG Design Pressure Temp (F) -40 to 300 20 Plates Surface Area per Plate (Sq.-Ft.) 0.566 sq ft Volume (Gal./Chnl.) 0.0273 Construction Material ASTM 316L Stainless Steel Copper Connection 1 in MNPT Capacity (GPM) 50 gpm 20.7 in 2.65 in 4.37 in 2.65 in 29.6 lb ASME Section VIII div. 1 CRN UL