The WDV2 Electronic Demand Drain Valves, with zero air
loss, are suitable for all compressed air system applications
from aftercoolers to filters to receivers to refrigerated dryers.
These drain valves activate automatically and are both
reliable and economical.
Alarm Mode
Should the drain fail to discharge due to an excessive
volume of condensate or blocked outlet piping, an alarm
condition is activated. During the alarm condition, the drain
cycles continuously in an attempt to remove the excess
condensate.
At the same time, the volt free alarm contacts
change state and the normally green power LED flashes to
indicate a problem. When the excess condensate or
blockage has been cleared, the drain will resume normal
operation.
Operation
Upon power up, the outlet valve is closed and sensor
is constantly monitoring for presence of liquid.
When condensate is detected by the sensor, the
outlet valve is opened for a pre-set time.