Maintenance-free pumps (MFPs) without moving parts are designed and developed for pumping hazardous fluids that are radioactive
high-temperature
toxic or corrosive. MFPs satisfy two criteria: (1) They should be capable of remote operation and control
and (2) There should be no moving parts (even electronic components) directly in contact with the hazardous fluid. Operating principles and performance for steam-pumps
air-lift pumps
vacuum operated slug lift pumps
diode pumps
forward flow diverter pumps (FFD pumps) and reverse flow diverter pumps (RFD pumps) are reviewed. Due to its excellent performance