Product Overview
The SMC AD402-04 is a pneumatically operated automatic drain valve engineered for condensate removal in compressed air preparation systems. Manufactured by SMC Corporation, a global leader in pneumatic control technology, this auto drain valve automatically discharges accumulated condensate from air filters, air dryers, receiver tanks, and separator bowls without manual intervention. The AD402-04 utilizes a float-actuated pilot mechanism that opens the drain port when condensate reaches a predetermined level, ensuring reliable moisture evacuation while preventing unnecessary air loss. Its compact, corrosion-resistant construction makes it an essential component for maintaining air quality and protecting downstream pneumatic equipment in industrial compressed air networks.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Auto Drain Valve (Pneumatic Process Valve) |
| Model Designation | AD402-04 |
| Operating Pressure | 0.1 – 1.0 MPa (1 – 10 bar) Standard Pneumatic Range |
| Port Size | 1/2″ (04 = Rc1/2 / NPT1/2 depending on thread type) |
| Drain Mechanism | Float-actuated pilot type, automatic discharge |
| Mounting & Connection | Threaded connection, direct mount to filter bowl / drain port |
| Body Material | Corrosion-resistant metal body with elastomer seals |
| Ambient / Fluid Temperature | 2 – 60°C (standard industrial range) |
Engineering Features & Advantages
- Precision Performance: Float-actuated pilot mechanism ensures accurate condensate level detection and reliable discharge without continuous air bleed, minimizing compressed air waste.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust seals and corrosion-resistant internals for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with SMC AD series auto drain valves and OEM pneumatic air preparation units.
- Maintenance-Free Operation: Eliminates manual draining requirements, reducing labor costs and preventing condensate carryover into downstream pneumatic equipment.
- Compact Integration: Space-efficient design allows direct installation onto filter bowls, separator units, and air receiver tanks without additional piping modifications.
Typical Industrial Applications
The SMC AD402-04 auto drain valve is widely deployed in compressed air treatment systems across industries including plastic injection molding machines, CNC machine tools, pneumatic automation and assembly lines, packaging machinery, and general factory air preparation units. It is particularly suited for applications where consistent removal of condensate from air filters, dryers, and receiver tanks is critical to maintaining air quality, protecting pneumatic valves and actuators, and ensuring uninterrupted production operations.
PRODUCT IMAGES
SMC AD402-04 Auto Drain Valve
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine SMC AD402-04 Auto Drain Valve. This Japan-made pneumatic component features a reliable automatic drain mechanism, delivering leak-free, reliable condensate removal for heavy-duty industrial compressed air systems.