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NM2304X-X1-X11 N Series

  • 4:1 Ratio
  • 3'' Air Motor
  • Max Flow: 2.1 GPM (8 LPM)
  • Max Fluid Pressure: 600 psi (41.4 bar)

About the 2-Ball piston pump range of ARO:

The most versatile pumps 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 gpm (68.6 l/min).

Simply Versatile

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

Pump Model**

Lower Pump Material

Plunger Material

Upper Packings

Lower Packings

Material Inlet

Weight lb (kg)

Pump

NM2304A-11-311

Carbon Steel

Carbon Steel

PTFE

PTFE

1.25” NPT(F)

32 (14.5)

637176

NM2304A-11-511

Carbon Steel

Carbon Steel

PTFE

PTFE

1.25” NPT(F)

32 (14.5)

637176

NM2304A-11-C11

Carbon Steel

Carbon Steel

UHMW-PE

UHMW-PE

1.25” NPT(F)

32 (14.5)

637228

NM2304A-41-311

Carbon Steel

Carbon Steel

PTFE

PTFE

Immersed

46 (20.9)

637176

NM2304A-41-511

Carbon Steel

Carbon Steel

PTFE

PTFE

Immersed

46 (20.9)

637176

NM2304A-41-C11

Carbon Steel

Carbon Steel

UHMW-PE

UHMW-PE

Immersed

46 (20.9)

637228

NM2304A-81-311

Carbon Steel

Stainless Steel

PTFE

PTFE

1.25” NPT(F)

31.4 (14.3)

637176

NM2304A-91-311

Carbon Steel

Stainless Steel

PTFE

PTFE

Immersed

45.4 (20.6)

637176

NM2304A-A1-311

Carbon Steel

Stainless Steel

PTFE

PTFE

Immersed

31 (14.1)

637176

NM2304A-B1-311

Carbon Steel

Stainless Steel

PTFE

PTFE

1.25” NPT(F)

32 (14.5)

637176

NM2304B-11-311

316 Stainless Steel

316 Stainless Steel

PTFE

PTFE

1.25” NPT(F)

32 (14.5)

K1875C11SS00

NM2304B-11-31B

316 Stainless Steel

316 Stainless Steel

PTFE

PTFE

1.25” NPT(F)

32 (14.5)

K1875C11SS00

NM2304B-11-C11

316 Stainless Steel

316 Stainless Steel

UHMW-PE

UHMW-PE

1.25” NPT(F)

32 (14.5)

K1875C11FF00

NM2304B-11-C1B

316 Stainless Steel

316 Stainless Steel

UHMW-PE

UHMW-PE

1.25” NPT(F)

32 (14.5)

K1875C11FF00

NM2304B-11-W11

316 Stainless Steel

316 Stainless Steel

PTFE

PTFE

1.25” NPT(F)

32 (14.5)

K1875C11VS00

NM2304B-41-311

316 Stainless Steel

316 Stainless Steel

PTFE

PTFE

1.25” NPT(F)

46 (20.9)

K1875C11SS00

NM2304B-41-C11

316 Stainless Steel

316 Stainless Steel

UHMW-PE

UHMW-PE

1.25” NPT(F)

46 (20.9)

K1875C11FF00

Ratio

4:1

Stroke

3”

Material Inlet

1-1/4” NPT(F) or 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 – 600 (0 – 41.4)

Max Cycles/Minute

125

Displacement/Cycle cu in (cm3)

8.2 (134.3)

Cycles/gal (L)

28.2 (7.4)

Flow @ 60 Cycles gpm (L/min)

2.1 (8.0)

Noise Level @ 60 psi dBA

85 @100 psi

Weight* lb (kg)

32 (14.5) - 46 (20.9)

Model

A in (mm)

B in (mm)

C in (mm)

NM2304A-11-X11

30.25 (768.5)

11.75 (297.7)

13.187 (334.2)

NM2304A-41-X11

55.625 (1413.0)

37.125 (942.2)

38.562 (978.7)

NM2304B-11-X11

28.125 (714.4)

9.718 (246.8)

11.096 (281.8)

NM2304B-41-X11

51.656 (1312.1)

33.25 (844.6)

34-5/8 (879.6)

Model No.

Air Inlet Pressure Range psi (bar)

Fluid Pressure Range psi (bar)

Flow @ 60 Cycles per Minute gpm (L/min)

Displacement per Cycle cu in (mL)

Lower Pump Material

Plunger Material

Air Motor

Air Motor Repair Kit

Lower Pump End Series

Lower Pump Repair Kit

NP304R01-1-B

0 - 150(0 - 10.3)

0 - 600(0 - 41.4)

2.1(8.0)

8.2(134.3)

Carbon Steel

Carbon Steel

66913

637316

67151-A-C11

637228

NP304R01-2-B

0 - 150(0 - 10.3)

0 - 600(0 - 41.4)

2.1(8.0)

8.2(134.3)

Carbon Steel

Carbon Steel

66913

637316

67151-A-311

637176