ARO 3/4'' Aluminum Diaphragm Pump

Maximum Flow: 33 gpm (125 lpm)

Maximum Discharge Pressure: 120 psi (8.3 bar)

Fluid Ports Inlet/Outlet:3/4 – 14 NPTF-2 Rp 3/4(3/4-14 BSP parallel)

Material of Construction: Aluminum

Maximum Solids: 1/8 inch (3.2 mm)

Maximum Dry Suction Lift: 17 ft (5.2 m)

Product Description

The new ARO 3/4″ aluminum air operateddiaphragm pump is designed to meet your OEM application needs.


  • Durable aluminum construction: The pump is made of durable aluminum, which makes it corrosion-resistant and lightweight. This makes the pump ideal for use in harsh environments, such as those with corrosive chemicals or high temperatures. The lightweight design also makes the pump easy to transport and install.
  • High flow rate: The pump has a maximum flow rate of 33 GPM (125 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.
  • Ability to handle suspended solids: The pump can handle suspended solids up to 1/8 inch (3.2 mm) in diameter, making it ideal for applications where there may be debris or contaminants in the fluid. This makes the pump suitable for use in applications such as wastewater treatment and industrial cleaning.
  • Easy maintenance and repair: The pump is easy to maintain and repair, thanks to its simple design and user-friendly features. The pump has a number of user-serviceable components, which makes it easy to troubleshoot and repair problems. The pump also comes with a comprehensive maintenance and repair manual, which provides step-by-step instructions on how to perform routine maintenance and repairs.
  • Explosion-proof design: The pump is available in an explosion-proof design, which makes it suitable for use in hazardous areas.
  • UL-certified: The pump is UL-certified, which means that it has been tested and approved for use in hazardous areas.


  • 66073-2 Air Line Connection Kit contains Piggyback Filter/Regulator, pipe nipple and 5’ section of hose
  • 66100 Wall Mount Bracket
  • 66975 Cycle Counter Kit
  • 637118-C Air Section Service Kit
  • 637119-XX-C Fluid Section Service Kit
Pump Casing Material
  • Aluminum
Diaphragm Materials
  • Neoprene
  • Nitrile
  • Viton
  • PTFE with Santoprene backer
  • Hytrel
  • Santoprene



Ratio: 1:1

Maximum Flow: 33 g.p.m. (125 l.p.m.)

Displacement per cycle: 0.15 Gallons (0.57 Liters)

Air Inlet: (Female) 1/4 – 18 NPTF-1

Fluid Inlet/Outlet:
3/4 – 14 NPTF-2
Rp 3/4 (3/4 -14 BSP, parallel)

Max. operating pressure: 120 psi (8.3 bar)

Suspended solids max. dia.: 1/8” (3.2 mm)

P66607A-XXX-A (aluminum) 17.5 lbs (7.94 kg)

Maximum dry suction lift: 17 ft (5.2 m)

Sound Level: 70 PSI 60 Cycles/Min 78.3 db(A)