Used 50 gallon Pfaudler glass lined reactor, rated 100 psi and full vacuum at 450 f internal, jacketed for 150 psi at 520 f, 2.5 DTW Pfaudler agitator drive with mechanical seal, hydraulic motor less pump, 3 blade retreat curve agitator, fin baffle, stainless steel sheathing over jacket, serial# R190-0417, national board# 45953, built 1990.