Used 10.8 sq ft Luwa evaporator. Model HS210/1600/10/20. 316 stainless steel product contact surfaces. Rated 300 psi and full vacuum at 500 F internal. Jacket rated 150 psi at 500 F. Hydraulic agitator less power pack. Certified by Nooter. Serial# H-6252. National board# 8887. Luwa serial# SO1-2253. Built 1971. Refurbished 1996.