For a relatively small investment in the correct selection of condensate drains and good general engineering practice, we can totally eliminate this unnecessary waste of expensive compressed air and energy. A Solution Level-sensing drains are one solution to the problems outlined. As the name implies, level sensing drains do not discharge valuable compressed air and therefore save energy. A level sensor located within the drain bowl constantly monitors the liquid level. When the liquid level reaches a pre-determined point, the solenoid valve is opened for a set duration.
Liquid is discharged from the drain bowl, under system pressure through the outlet port.
4 The pre-set opening time has been selected to allow a small amount of condensate to remain within the bowl after the solenoid valve has closed. The level monitoring and discharge operations are continuous. Should the drain fail to discharge, due to an excessive volume of condensate or blocked outlet piping an alarm mode is activated. During the alarm mode, the drain will continue to cycle to clear the liquid in the bowl. Volt-free alarm contacts allow connection to remote monitoring systems providing fault indication.