Model AD40204 — 1/2' Automatic Drain Valve for Pneumatic Air Systems Compact, reliable auto drain valve designed to remove condensed water and contaminants from compressed air lines, filters, separators and dryers. The AD40204 automates condensate removal so your pneumatic equipment runs cleaner with less manual maintenance. Key benefits Reduces downtime and maintenance: automatically discharges condensate so operators don't have to drain lines manually. Protects downstream equipment: prevents water and trapped contaminants from reaching pneumatic tools, valves and instruments. Improves filter and dryer performance: keeps separators and dryers operating efficiently by removing collected liquid. Simple inline integration: designed to fit directly into pneumatic air source lines and filter housings with a 1/2' connection. Key attributes Model: AD40204 Connection size: 1/2' Function: automatic condensate drain (auto drain valve) for pneumatic air sources Applications: air water trap, separator, dryer, drainer filter integration How it solves problems Condensed water is a common issue in compressed air systems, causing corrosion, contamination and impaired performance. The AD40204 automatically discharges collected condensate from traps, separators and dryer bowls, reducing the risk of waterrelated damage and maintaining consistent air quality without frequent manual intervention. Typical uses and applications Compressed air receiver tanks and filter housings: automatic removal of condensate from tank drains and filter bowls to keep the system dry and reliable. Air preparation units (separators and dryers): paired with inline separators or coalescing filters to evacuate trapped water and extend the life and effectiveness of filtration and drying equipment. Pneumatic control systems and downstream tools: protects valves, actuators and spray equipment from water ingress that can cause sticking, corrosion or finish defects. Installation and maintenance Designed for inline installation on 1/2' connections in standard pneumatic air source lines and filter assemblies. Provides continuous automatic drainage to minimize manual checks; recommended routine inspection to verify operation and ensure proper sealing. Ordering information Model: AD40204 Connection size: 1/2' The AD40204 automatic drain valve is a straightforward, effective component for maintaining compressed air system reliability by automatically removing condensate from traps, separators and dryer/filter assemblies.