PRESVAC Pump We constantly challenge ourselves to utilize new technologies which will help us push the performance envelope. This translates into leading edge technology in everything we build. PV750 SPECIFICATIONS Shaft R.P.M.: 1500 Vacuum Rating: 29" Pressure Rating: 43 PSI Cu. Ft. Free Air Per Minute: 420 Cu. Ft. Air At 18" Per Minute: 350 Max H.P. Vacuum: 28 Max H.P. Pressure: 41 Cooling Method: Forced Air