Ingersoll Rand R27221-600-LS Pneumatic Regulator

The Ingersoll Rand R27221-600-LS Pneumatic Regulator is a compact, standard 1/4" NPT pressure regulator from the ARO family designed to down-regulate incoming compressed air to a stable downstream pressure in small to mid-size circuits. It accepts up to 200 psi on the inlet and provides an adjustable output range typically cited as 5–125 psi, enabling precise control of downstream devices in automation setups. The R27221-600 designation identifies this regulator in distributor catalogs; industry listings note that this model has been discontinued by the manufacturer, so new inventory may be limited to remaining stock or replacement equivalents. The 1/4" NPT ports support straightforward integration into standard air lines, and the compact form factor makes it suitable for panel mounting or inline installation where space is at a premium. Because the model has been discontinued by the manufacturer, availability generally depends on distributor stock or replacement options.