Atlas Copco EWD 75 is a Zero Loss Automatic Drain Valve. The EWD75 is reliable, as the wide drain passageway reduces the chances of blockages. Level sensor can detect problems and activate an alarm. This drain also offers energy savings, as zero compressed air is wasted during its operations. This drain valve is ideal to use with air compressors up to 208 CFM and air dryers up to 411 CFM.