ARO EXP Series diaphragm pumps now include new 3” non-metallic models available in polypropylene or PVDF. The NEW 3” non-metallic models are reliable, efficient and offer a lower Total Cost of Ownership that has made ARO a leading brand in the pumping industry. With flow rates up to 285 gpm (1,079 lpm) our 3” non-metallic models can meet or exceed your application requirements.

Long-Life PTFE Diaphragms also available.

3″ Non-Metallic Pump Features

  • Efficient transfer leveraging EXP air motor design
  • Faster transfer, 55% more flow than ARO EXP 2” Non-Metallic models

EXP Features

  • EXP Total Cost of Ownership (TCO) Best  TCO of all major competitive models tested
  • EXP Reliability Lube free patented differential valve both on major air valve and SimulShift (Pilot Valve) provides reliable worry free operation
  • EXP Serviceability Modular construction, reduced parts count and simple to use repair kits will minimize repair time and cost
  • EXP Control & Monitoring – “Process Ready” Electronic interface capability assures consistent flow rates and pinpoint control. End of stroke feedback (EOS) and leak detection.
  • EXP Productivity Maximized flow rates with minimized pulsation and  air consumption = Maximum Performance


  • 66109 – Air Line Connection Kit: contains Piggyback Filter / Regulator, pipe nipple & 5’ section of hose
  • 637369 – Air Motor Service Kit
  • 6373447-AA, 637447-GG, 637447-TL, 637447-TT – Fluid Section Service Repair Kit
  • End of Stroke Sensors: 97121 – Regular Duty
  • Leak Detection: 67237 – Regular Duty

Pump Casing Materials

  • PVDF
  • Polypropylene

Diaphragm Materials

  • LongLife PTFE
  • Santoprene®
  • Hytrel®
  • Buna-N
  • PTFE w/ Santoprene ® backer


  • Maximum Flow gpm (lpm): 285 (1,079)
  • Maximum Discharge Pressure psi (bar): 120 (8.3)
  • Fluid Ports Inlet/Outlet (bsp): 3” DIN (8-Bolt) Flange 3” ANSI (4-Bolt) Flange
  • Material of Construction: Polypropylene PVDF
  • Maximum Solids in (mm): 3/8 (9.5)
  • Maximum Dry Suction Lift ft (m): 20.5 (6.3)