Speedaire 4ZL28 Compressed Air Line Filter Assembly

Speedaire 4ZL28 Compressed Air Line Filter Assembly is an inline particulate filter designed for 1/4" NPT lines, delivering up to 55 CFM of flow while withstanding up to 150 psi maximum operating pressure. It is a heavy‑duty filter that removes airborne impurities, dirt particles, condensation, and oil aerosols from compressed air to protect downstream components and improve pneumatic performance. The compact 4ZL28 model fits standard shop and light industrial systems and is commonly used as a first stage in general air‑line filtration, with a straightforward installation in Speedaire’s modular filtration family. Replacement filter elements for the 4ZL series are available, supporting maintenance and sustained filtration efficiency. With its 1/4" NPT ports, this assembly integrates neatly into typical pneumatic distributions, helping extend the life of downstream actuators and tools and contributing to cleaner operation in applications where clean, dry air is essential.