Complete, two-piece, jacketed flask with bottom outlet, pressure reactor system designed to perform low to moderate positive pressure reactions, synthesis and catalysis. Reactor capacities range from 500ml to 5000ml and use Ace-Threds to achieve a leak-tight system. Two-piece (flanged flask and head) design allows the use of large agitators and facilitates product removal and clean-out. Rated 36PSIG at 100°C. Reactor bodies are available with either ball joint or Ace-Thred inlets/outlets. They may be purchased separately.