Unused 60" top head for De Dietrich 500 gallon reactor. National board #3935. 75/full vacuum PSIG @ 500°F. Manufacturer #33225. Built 1986. 3008 glass. U-stamped 17 1/2" manway opening. 5 1/2" agitator nozzle. (6) 4" nozzles. (1) 8" nozzles. Unused.
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