ARO Piston Transfer Pumps & Packages

Pneumatic Piston Pumps: The Solution for Your Medium to Highly Viscous Applications


ARO piston pumps are capable of handling a range of viscous fluids. With a wide selection of pressure ratios and displacement rates available, ARO offers a number of piston pump packages that can meet your specific application and flow rates needs.


Piston Pump Types

Offered in multiple configurations, including single-post, two-post and heavy-duty two-post, our customizable packages ensure you have the right solution for a variety of piston pump applications, including oil and grease, paint and spray coatings, adhesives, sealants, bulk material transfer and circulation and much more.

ARO® piston pumps offer a wide range of transfer, extrusion, and finishing packages that not only enhance your productivity, but also simplify the ordering process. We provide you with the right configuration of air motor, piston pump, mount, follower, controls, and down-stream accessories; you simply attach an air hose, connect the package to the fluid source, attach a fluid outlet line and you’re good to go.

Piston Pump Components:


Coupled with our air motor, we can configure our 2-ball, 4-ball, and chop-check pumps to be optimized for your application.

Air motor

Available in seven sizes, our air motors provide power and reciprocating motion to our pumps. The larger the air motor, the more power it delivers.


Our single-post, two-post, and cart-mounted systems are used to pump material out of containers. They enable quick container changeover, minimizing process interruptions. The 3.25" cylinders deliver best-in-class down force, improving material supply to the pump.

Follower plate

Connected to the pump and the ram, follower plates feed material into the pump from a variety of container sizes. In addition to improving pump performance, follower plates protect your material and reduce waste.

At ARO our positive displacement pumps can be divided basically in 3 types:

  • 2 ball piston pumps: 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 as Spray, Extrusion, Transfer and Supply and materials as oils, coatings, paint and chemicals.
  • 4-ball piston pumps are designed to transfer high volumes of low- and medium-viscosity fluids up to 12,500 cPs with fluid delivery up to 32.8 gpm (124.0 L/min), depending on the application. A common use involves circulating fluid from the original container, to the point of use, and then back.
  • Chop-Check Pumps: The heavy-hitters of the line, ARO chop-check pumps are designed to move medium- to high- viscosity fluids ranging from 15,000 to more than 1,000,000 cPs, and at delivery rates up to 12.2 gpm (46.3 L/min).Applications as: Extrusion, Transfer & Supply and Lubrication, with materials as Caulking, Heavy, lubricants, Mastics, Sealants, Inks, Grease.

Piston draws:

Piston Pump Packages to Fit Your Application

Proper fluid management is about more than just a reliable pump–it requires a comprehensive system of integrated parts working together to enhance your productivity and output. To simplify the ordering process, ARO offers complete hydraulic & pneumatic piston pump packages that provide the right configuration of air motor, piston pump, mount, follow, controls, and down-stream accessories for your specific application.

Not sure what size air motor or piston pump you need? No problem. You can find out by using our backpressure-ratio-calculator.

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