In the Dry Alarm Valve, compressed air is supplied to the installation with the help of a special orifice, this orifice only allows feeding in a way that can meet the losses.

There is air at the top of the dry alarm valve and water at the bottom. In the event of a fire, first the air is automatically discharged over the sprinkler and valve, and then water is supplied to the installation.

The dry system is used in places where there is a danger of freezing and in areas where water can have a harmful effect in normal situations.