Speedaire 4ZL29 Pneumatic Filter 3/8 Port 5 Micron

Speedaire 4ZL29 is a compact general‑purpose compressed air filter for 3/8 in NPT lines, designed to trap particulates down to 5 microns. It supports up to 55 CFM and up to 250 psi maximum operating pressure, making it suitable for shop air systems and light industrial pneumatic circuits. As the upstream stage in Speedaire’s modular FRL assemblies, it helps protect downstream regulators and actuators by capturing grit, dust, and other solid contaminants before they reach more sensitive filtration or lubrication stages. The 4ZL29 is a true general‑purpose filter rather than a specialized coalescing or mist filter, providing reliable particulate filtration in everyday equipment such as pneumatic tools, cylinders, grippers, and automation components. Its compact footprint and 3/8 in NPT threading simplify integration into existing lines and permit straightforward replacement or maintenance as part of a broader air filtration strategy. Applications span general workshop air lines, bench tooling, and small‑to‑medium scale automation setups where consistent air quality supports predictable performance and equipment longevity.