61204X-X Series Pumps

61204X-X Series 2-Ball Piston Pumps & Packages

1:1 Ratio
2" Air Motor
18 GPM (68.1 LPM) Max Flow
Max Fluid: 150 psi



Available Models

Pump Model** Lower Pump Material Container Suitability Type Plunger Material Upper Packings Lower Packings Pump Service Kit
612041-1 Carbon Steel, Nickel-Plated 55 Gallon (208.2 L) Wall mount or drum Carbon Steel Nitrile Nitrile 637081.0
612401-3 Carbon Steel, Nickel-Plated 55 Gallon (208.2 L) Wall mount or drum Carbon Steel PTFE PTFE 637083.0
612042-1 Carbon Steel, Nickel-Plated 275 Gallon (1041 L) Wall mount or drum Carbon Steel Nitrile Nitrile 637081.0

*Lower pump repair kit

Simply Versatile

2-ball pumps are among the most versatile in the ARO® line. They are capable of handling applications from simple transfer to the extrusion of low- to medium- viscosity materials up to 100,000 centipoise (cPs) with fluid delivery up to 18.1 gpm (68.6 L/min).

Applications advantages of 2-balls:

Spray: 2-ball pumps deliver the constant flow rate and pressure needed for consistent and efficient coatings applications
Transfer & Supply: Depending on the model, some 2-ball pumps can achieve flow rates up to 18.1 gpm, providing dependable results
Extrusion: 2-ball pumps generate pressure to handle extrusion of low-to medium-viscosity
Lubrication: ARO® 2-balls pumps provide the flow and pressure required for moving light oils and grease lubricants
High Pressure Cleaning: ARO® Wash Pump Packages are portable and offer the the right option for industrial cleaning applications

Materials advantages of 2-balls:

  • Sheer sensitive materials: ARO® 2-ball pumps minimize friction points to prevent fluid shear, when compared to other similar pumping technologies
  • Abrasive and high solid materials: ARO 2-ball pump minimize friction points and allow smooth passages to maintain fluid consistency
  • Optional ceramic coating provides an even stronger defense against highly abrasive fluids like paint and glass-filled sealer


Ratio 1:1
Stroke 2”
Material Inlet Immersed
Material Outlet 3/4” NPT(F)
Air Inlet (female) 1/4” NPT(F)
Air Inlet Pressure Range psi (bar) 0 – 150 (0 – 10.3)
Fluid Pressure Range psi (bar) 0 – 150 (0 – 10.3)
Max Cycles/Minute 75.0
Displacement/Cycle cu in (cm3) 18.8 (308.0)
Cycles/gal (L) 12.3 (3.3)
Flow @ 75 Cycles gpm (L/min) 90 (3.0)
Noise Level @ 60 psi dBA 9.0 (34.1)
Weight* lb (kg) 612041-1, 612401-3: 13 (5.9)
612402-1: 14 (6.4) 
61204X-X Flow Curves
61204X-X Series Pumps


Dimensions A in (mm) B in (mm)
612041-X 54 (1371.6) 34.625 (879.5)
612042-X 64.25 (1631.9)  44.875 (1139.8)