Dayton 4ZL49 Pneumatic Air Preparation Assembly

The Dayton 4ZL49 Pneumatic Air Preparation Assembly is a modular FRL-style unit that filters, regulates, and distributes compressed air for industrial pneumatic equipment. Combining a particulate and moisture-separating filter, a regulator, and inline air connectors, the assembly provides clean, regulated compressed air to downstream tools and machinery, with dual air hose connections available in the 4ZL49 and 4ZM20 configurations. Designed for industrial automation lines, air tool stations, packaging machinery, and general plant air distribution, it supports standard compressed air systems and offers a regulator range up to 150 psi depending on model, with port sizes and mounting options that include panel or inline installation. Its aluminum alloy and engineering polymer body, along with a user-accessible drain (manual or semi-automatic by model), deliver robust performance in harsh industrial environments. Common replacements for similar FRL-style air preparation units include the SMC AC Series Air Preparation Unit, Parker P3A Filter Regulator Assembly, and Festo LFR-1/4-D-MINI FRL Unit.