The Atlas Copco EWD 330M (PN: 1622855181) is a high-performance, zero-loss automatic condensate drain valve designed for continuous operation in compressed air systems. Engineered to discharge condensate without losing compressed air, this unit ensures maximum energy efficiency while protecting your air dryer, filters, and downstream equipment from moisture damage.
Built with a robust, corrosion-resistant metal body (Stainless Steel/Aluminum) and a wide 1/2″ NPT passageway, the EWD 330M prevents clogging—a common issue in standard ball valve drains—ensuring reliable performance in demanding industrial environments.
Key Features & Benefits
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Zero Air Loss (No Loss): The intelligent timing and level sensing ensure only condensate is discharged, saving significant energy costs compared to manual or fixed timer drains.
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Wide Compatibility: Operates at pressures from 18 to 215 PSIG (1.2/15 BAR) and requires a 115VAC power supply .
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Clog-Resistant Design: A large orifice diameter reduces the risk of blockages from sludge and rust particles, ensuring maintenance-free operation .
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Easy Diagnostics: Features a “TEST” button for instant manual activation and troubleshooting, allowing operators to quickly verify mechanical function without waiting for the cycle timer .
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Durable Construction: Manufactured with high-grade materials to withstand harsh conditions, rated for ambient temperatures up to 140°F (60°C) .
Technical Specifications
| Specification | Details |
|---|---|
| Model | EWD 330M |
| Manufacturer | Atlas Copco |
| Part Number | 1622855181 |
| Voltage | 115V AC (±10%) / 50-60Hz |
| Max Operating Pressure | 215 PSIG (15 BAR) / 230 PSI Max |
| Connection Type | 1/2″ NPT |
| Drain Type | Zero Loss / No Loss (Electronic) |
| Material | Metal Alloy / Stainless Steel |
| Dimensions (LxWxH) | Approx. 8.3 x 3.7 x 6.4 inches |
| Application | Screw Compressors, Air Dryers, Filters |
Applications
This valve is the ideal replacement or upgrade part for:
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Atlas Copco GA series compressors (GA37-GA75) .
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Refrigerated air dryers requiring high-flow condensate removal.
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Central filtration units.
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Oil-injected screw compressors needing reliable moisture ejection

























