Timer auto drain valve  for compressed air:

Specifications
Automatic electronic drain valve for air compressor
Automatic drain valve
-guarantee period: 1year
-Prevents rusting
Automatic electronic drain valve for air compressor
High quality, low cost
One kind of model suits all applications, simple installment,
Completely
Description: High Quality integrated electric drain valve / electric valve / brass valve

The electronic drain valve is a full-feature automatic electronic solenoid drain valve that cost-effectively removes condensate from compressors, receivers, dryers, aftercoolers, filters and drip legs.