Speedaire 3JV31 Filter Regulator

Speedaire 3JV31 Filter Regulator is a compact inline FRL unit for 1/2 in NPT lines that combines an air filter and a regulator to remove contaminants and set downstream pressure, with a maximum operating pressure of 250 psi (1700 kPa). Designed for industrial compressed-air systems, it delivers cleaner, more consistent air to tools and actuators by filtering impurities before regulation and maintaining a stable output pressure suitable for standard shop-air equipment. The 3JV31 is a Speedaire model that is discontinued by the manufacturer, so current availability is typically through distributors or surplus channels; when sourcing, verify compatibility with 1/2 in NPT fittings and the downstream devices it will serve. Common applications include supplying pneumatic tools, cylinders, and other air-operated equipment that require clean air and controlled pressure from a central or localized air supply.