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  • 2:1 Ratio
  • 2'' Air Motor
  • Max Flow: 2.15 GPM (8.14 LPM)
  • Max Fluid Pressure: 351 psi

Simply Versatile

2-ball pumps are among the most versatilein 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 to18.1 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
piston pump NM2202X-X1-X31 flow directions

Pump Model**

Lower Pump Material

Plunger Material

Upper Packings

Lower Packings

Pump Service Kit

NM2202A-11-731

Carbon Steel

Carbon Steel

PTFE

PTFE

637378-731

NM2202A-11-C31

Carbon Steel

Carbon Steel

UHMW-PE

UHMW-PE

637378-C31

NM2202A-11-J31

Carbon Steel

Carbon Steel

Polyurethane

UHWM-PE

637378-J31

NM2202A-41-731

Carbon Steel

Carbon Steel

PTFE

PTFE

637378-731

NM2202A-41-C31

Carbon Steel

Carbon Steel

UHMW-PE

UHMW-PE

637378-C31

NM2202A-41-J31

Carbon Steel

Carbon Steel

Polyurethane

UHMW-PE

637378-J31

NM2202B-11-731

Stainless Steel

Stainless Steel

PTFE

PTFE

637379-731

NM2202B-11-C31

Stainless Steel

Stainless Steel

UHMW-PE

UHMW-PE

637379-C31

NM2202B-11-J31

Stainless Steel

Stainless Steel

Polyurethane

UHMW-PE

637379-J31

NM2202B-41-731

Stainless Steel

Stainless Steel

PTFE

PTFE

637379-731

NM2202B-41-C31

Stainless Steel

Stainless Steel

UHMW-PE

UHMW-PE

637379-C31

NM2202B-41-J31

Stainless Steel

Stainless Steel

Polyurethane

UHMW-PE

637379-J31

Ratio

2:1

Stroke

2”

Material Inlet

1-1/2” NPT(F)

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 – 351 (0 – 24.2)

Max Cycles/Minute

120

Displacement/Cycle cu in (cm3)

8.3 (136.0)

Cycles/gal (L)

27.9 (7.3)

Flow @ 60 Cycles gpm (L/min)

2.15 (8.14)

Noise Level @ 60 psi dBA

80

Weight* lb (kg)

NM2202A-11-X31 17.5 (7.9)NM2202A-41-X31 19.6 (8.9)NM2202B-11-X31 17.2 (7.8)NM2202B-41-X31 22.5 (10.2)

Length per Model

Dimensions

A in (mm)

B in (mm)

NM2202A-11-X31

34.17(868)

20.03(509)

NM2202A-41-X31

47.83 (1215)

33.70(856)

NM2202B-11-X31

33.85 (860)

19.84(504)

NM2202B-41-X31

47.71(1212)

33.70(856)

piston pump NM2202X-X1-X31 dimensions
piston pump NM2202X-X1-X31 flow rate
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