Compare Parr Instruments Parr 452HC3 Stirred Pressure Vessel SS 600 ml Parr 452HC3 600ml Stainless Steel Stirred High Pressure Reactor For sale - Parr Pressure Reactor vessel. Model 452HC3 Capacity 600 ml material grade Stainless Steel high pressure P max 3000 psig at 350 C. $2,500.00