Technical Articles

Industrial Concepts, Processes, Technologies, and More

Increase your knowledge of industrial concepts, explore real customer case studies, and discover the latest innovations in John Henry Foster’s expansive library of technical articles.

ARO® Pumps & FRLs — Sales, Service & Maintenance | John Henry Foster
John Henry Foster × ARO®

ARO® Pumps, Lubrication & FRLs — Sales, Service & Maintenance

As an authorized distributor, John Henry Foster helps you spec, supply, and maintain ARO® fluid handling equipment—air‑operated & electric diaphragm pumps, piston pumps, lubrication systems, and ARO‑Flo FRLs—for reliable, efficient production.

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Products

What we sell & support

ARO AODD Pump

Air‑Operated Diaphragm Pumps (AODD)

Proven, stall‑resistant pumps for light‑to‑medium viscosity fluids—even with solids. Available in metallic and non‑metallic builds, with ATEX options.

ARO EVO Electric Pump

Electric Diaphragm Pumps (EVO Series™)

Energy‑efficient, sealless positive‑displacement technology for continuous duty and precise control—ideal when air is limited or energy costs matter.

ARO Piston Pump

Piston Pumps & Packages

Hydraulic and pneumatic piston pumps for transfer and extrusion—handling viscosities up to 1,000,000 cP for coatings, sealants, and adhesives.

ARO Lubrication Equipment

Lubrication Equipment

Oil and grease pumps in ratios from 3:1 to 100:1 for shop service through heavy equipment lube systems—plus meters, handles, and reels.

ARO-Flo FRLs

ARO‑Flo FRLs

Modular filters, regulators, and lubricators to protect your pneumatics and keep devices running at peak performance with precise oil feed control.

ARO Repair Kits

OEM Parts & Repair Kits

Genuine air & fluid section kits, diaphragms, checks, and seals to restore factory performance and protect warranties.

© John Henry Foster Company of St. Louis. ARO® is a trademark of Ingersoll Rand and used here for reference only.
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Engineering Articles
Aug 06, 2025
Why Pneumatics Still Matter in Modern Manufacturing
By: John Henry Foster, St. Louis

Discover why pneumatics remain essential in today’s automated manufacturing—from reliability and energy efficiency to cost-effective performance. Learn how pneumatic systems continue to drive smart, scalable solutions.

Sep 30, 2021
John Henry Foster Acquires Farrar Pump and Machinery Company
By: John Henry Foster

John Henry Foster Company (“JHF”) is excited to announce the acquisition of the assets of Farrar Pump and Machinery Company (“Farrar”).

May 26, 2021
Compressed Air Solutions-Simplified
By: John Henry Foster

A local engineering firm- who specializes in the minerals industry- was asked to help implement a new process at their customer's facility.

Apr 21, 2021
Guarding Employee Safety
By: John Henry Foster

For JHF’s customer, employee safety is a top priority.

Apr 06, 2021
Air Study Leads to Less HP and More Efficiency!
By: John Henry Foster

JHF's customer had three aging Atlas Copco units (two ZR90 fixed speed and one ZR90 variable speed, totaling 360HP) that were constantly requiring repairs and threatening downtime to critical manufacturing processes.

Mar 31, 2021
Proactive Compressed Air Maintenance Makes Downtime a Rarity
By: John Henry Foster

The JHF compressed air team has been supporting our loyal customer- a recycling plant- since 2018.