Used Pfaudler 500 gallon T-316L stainless steel reactor body. 52" diameter X 50" high straight side. Internal rated 150 PSI @ 650 degrees F. Carbon steel conventional jacket rated 150 PSI @ 650 degrees F. NB# 209041. Top Fittings: 18" manway, (3) 4", (2) 2", (1) 1" and (1) 8". 3" center bottom drain. Can be lug or leg mounted.