Part of our Compact Series of pumps, our 3/8” pumps feature big performance in a small package. They feature flow rates up to 10.6 GPM (40.1 LPM) and a wide range of material and porting configurations.


  • A favorite of OEM’s around the world.
  • Big delivery in a small package.
  • Manufactured for complete corrosion resistance – constructed with polypropylene center body, standard stainless steel fasteners, and your choice of PVDF, Polypropylene, or Groundable Acetal casing materials
  • Efficiency – Simul-Shift™ valve provides ultra-positive, reliable shift signal
  • Reliability – ARO’s patented ‘Unbalanced’ air valve ensures no-stall operation
  • Versatility – Center, End, and Dual Inlet / Outlet manifold configurations for your application needs
  • Environmentally Sound – Bolted construction for leak-free fluid handling
  • Serviceability – Ease of service through modular design


  • 66073-1 Air Line Connection Kit: contains Piggyback Filter / Regulator, pipe nipple & 5’ section of hose
  • 67388 Wall Mount Bracket
  • 66975 Cycle Counter Kit
  • 637442-X Dual Inlet / Outlet Kits
  • 67165-X Cycle Actuation Kit
  • 67386 Cycle Sensor Kit
  • 637428 Air Section Service Kit
  • 637429-XX Fluid Section Service Kit

Pump Casing Materials

  • Polypropylene
  • PVDF (Kynar)
  • Groundable Acetal

Diaphragm Materials

  • Santoprene
  • Hytrel
  • PTFE w/ Santoprene backer
  • Viton