Get current pricing for Penwalt/stokes, Penwalt/Stokes 30 Cu 30 Cu.ft. (220 Gal.) Penwalt/stokes Rotary Vacuum Dryer Model# 59-504, # P77777.3. Batch Jacketed Vacuum Dryer. Stainless Steel Contact Parts. . Product Category: Process Equipment, Sub Category: Process Dryers: