Ingersoll Rand 651790-A3B-B Air Line Regulator

The Ingersoll Rand 651790-A3B-B is a stainless-steel downstream air-line regulator in the ARO line, designed to deliver precise, adjustable pressure to pneumatic systems. This piston-style regulator features 3/8" porting and a corrosion-resistant body with tungsten carbide seating for long life in demanding environments. It provides an adjustable downstream output from 0 to 4 bar (0–60 psi) and tolerates an inlet pressure up to 50 bar (725 psi), making it suitable for feeding tools and actuators with stable pressure. By providing smooth, consistent regulation and quick setpoint changes, it helps protect valves, cylinders, and other downstream components while improving tool performance on assembly lines, automation cells, and general manufacturing air systems. The model 651790-A3B-B identifies this specific regulator within Ingersoll Rand’s ARO line, signaling compatibility with standard 3/8" line fittings and straightforward integration into existing air lines for industrial applications. Typical uses include air tools, clamps, grippers, and actuators across manufacturing, automotive, and packaging environments where reliable pressure control is essential.