3'' EXP Non-Metallic Air Operated Diaphragm Pump


Available Now

Maximum Flow gpm (lpm): 285 (1,079)
Maximum Discharge Pressure psi (bar): 120 (8.3)
Fluid Ports Inlet/Outlet:
3” DIN (8-Bolt) Flange

3” ANSI (4-Bolt) Flange
Material of Construction:
Maximum Solids in (mm): 3/8 (9.5)
Maximum Dry Suction Lift ft (m): 20.5 (6.3)


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 Benefits

  • 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 - 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

  • Long Life PTFE
  • Santoprene®
  • Hytrel®
  • Buna-N
  • PTFE w/ Santoprene® backer




Maximum GPM (LPM): 

285 GPM (1079 LPM)

Air Inlet:  

3/4-14 NPT

Fluid Inlet / Outlet

3” DIN (8-Bolt) Flange or
3” ANSI (4-Bolt) Flange

Max. operating pressure psi (bar):

120 psi (8.3 Bar)

Suspended solids max. dia.  in. (mm):

3/8”  (9.5mm)

Weight lbs (kg):

170 lbs (77.11 kg)

242 lbs (109.59 kg)

Maximum dry suction lift ft (m):

20.5 ft. (6.3m)

Sound Level:

70 PSI
60 Cycles/Min.
85.3 db(A)

Muffler Included:


3" Non-Metallic Diaphragm Pump Flow Curves