ARO® Pro Series air operated diaphragm pumps are ideal for general industrial and OEM installation
applications. They can easily pump from clean, light viscosity fluids to corrosive, abrasive medium viscosity fluids and can transfer large particles without damage. Due to their pneumatic motor, they may be used in potentially explosive areas. Most of the ARO® diaphragm pumps are ATEX certified (CE Ex11 2GD X).


  • Industry leading flow rates with a maximum delivery of 237 GPM (897 LPM)
  • Ideal answer to big volume applications 
  • Efficiency – Motor design delivers optimum air efficiency
  • Reliability – ARO’s patented ‘Unbalanced’ air valve ensures no-stall operation
  • Versatility – Appropriate for various applications such as  material transfer to portable dewatering
  • Environmentally Sound – Bolted construction for leak-free fluid handling
  • Serviceability – Easy access to ball checks and fluid caps for maintenance and repairs


  • 66312 Air Line Connection Kit: contains Piggyback Filter / Regulator, pipe nipple & 5’ section of hose
  • 66975 Cycle Counter Kit
  • 637434 Air Section Service Kit
  • 637433-XX Fluid Section Service Kit

Pump Casing Materials

  • Aluminum
  • Stainless Steel
  • Cast Iron

Diaphragm Materials

  • PTFE w/ Santoprene backer
  • Hytrel
  • Santoprene
  • Nitrile