NM2318B-13-X43 'N' Series Pump

NM2318B-13-X43 'N' Series 2-Ball Piston Pump

18:1 Ratio
3" Air Motor
0.61 GPM (2.3 LPM) Max Flow
Max Fluid: 2,700 psi



Available Models

Pump Model** Lower Pump Material Plunger Material Upper Packings Lower Packings Pump Service Kit
NM2318B-13-C43 304 Stainless Steel 17-4 Stainless Steel UHMW-PE UHMW-PE 637394-X43
NM2318B-13-L43 304 Stainless Steel 17-4 Stainless Steel PTFE PTFE 637394-X43

**Add “-1” to Model No. for Ball Valve Regulator



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 18:1
Stroke 3”
Material Inlet 1/2” NPT(F)
Material Outlet 1/4” 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 – 2,700 (0 – 186.2)
Max Cycles/Minute 120.0
Displacement/Cycle cu in (cm3) 2.3 (37.6)
Cycles/gal (L) 98.3 (26.5)
Flow @ 60 Cycles gpm (L/min) 0.6 (2.3)
Noise Level @ 60 psi dBA 85.0
Weight* lb (kg) 12.6 (5.7)
61204X-X Series Pumps


A* in (mm) 23.187 (563.6)
B in (mm) 13.812 (334.2)
C in (mm) 6.937 (175.4)