Unused 60" top head for a 500 gallon De Dietrich reactor. National Board #2871. U-stamped. 75/full vacuum PSIG @ 500°F. Manufacturer #32127. Built 1981. 3008 glass. 17½" manway opening. 5½" agitator nozzle, (4) 4½" nozzles, (1) 8" nozzle. U-stamped. Unused.
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