ARO 1 1/2'' Pro Series Non-Metallic Diaphragm Pump

6661XX-XXX-C 100 GPM (378.5 LPM)

Product Description

  • Durable non-metallic materials: Robust construction with thick walled injection, molded fluid casings and cast iron or aluminum center sections to withstand tough industrial applications.
  • Efficiency: Motor design delivers optimum air efficiency
  • Reliability: ARO’s patented ‘Unbalanced’ air valve ensures no-stall operation
  • Versatility: Multiple porting options for your application needs – Available in Flanged, Threaded, or 3 piece Manifold configurations
  • Environmentally sound: Bolted construction for leak-free fluid handling
  • Easy maintenance and repair: Easy access to ball checks and fluid caps for maintenance and repairs
  • High flow rate: The pump has a maximum flow rate of 100 GPM (378.5 LPM), making it ideal for high-volume applications. This makes the pump suitable for use in a variety of industries, such as chemical processing, food and beverage processing, and water treatment.
  • High operating pressure: The pump has a maximum operating pressure of 120 psi (8.3 bar), making it suitable for demanding applications. This makes the pump suitable for use in applications where there is a need to pump fluids under high pressure, such as in the automotive and aerospace industries.


  • 66084-1 Air Line Connection Kit: contains Piggyback Filter / Regulator, pipe nipple & 5’ section of hose
  • 67079 Flange Connection Kit: converts connection to N.P.T.F. threading configurations
  • 66975 Cycle Counter Kit
  • 637118-C Air Section Service Kit
  • 637165-XX Fluid Section Service Kit
Pump Casing Materials
  • Polypropylene
  • PVDF (Kynar)
Diaphragm Materials
  • Viton
  • PTFE w/ Santoprene backer
  • Hytrel
  • Santoprene
  • Nitrile
  • Neoprene
  • E.P.R.



Ratio: 1:1

Maximum Flow:
100 GPM (378.5 LPM)

Displacement per cycle:
Standard Diaphragm 0.67 gallons (2.54 liters)
Composite PTFE Diaphragm 0.43 gallons (1.63 liters)

Air Inlet: (Female) 1/2-14 NPTF

Fluid Inlet/Outlet: 1-1/2” ANSI Flange

Max. operating pressure: 120 psi (8.3 bar)

Suspended solids max. dia.: 1/4” dia. (6 mm)

Polypropylene 62 lbs (28.1 kg)
PVDF (Kynar®) 92 lbs (41.7 kg)
Note: Add 23 lbs (10.4 kgs) for cast iron air motor section.

Maximum dry suction lift: 14 ft (4.27 m)

Sound Level:
70 PSI (4.8 bar) 60 Cycles/Min 77.7 db(A)