The lockable isolation valve 3/2 way of the series AT is used to open the circuit, allowing in this way the air to flow from the entrance (A) D
towards the exit (B). When turning the control element (C) clockwise, the valve will be opened. When turning counterclockwise, the valve
will close the air in the entrance (A) and the air at the lower end of the valve (B) will be released by means of the outlet (E). When the
control element (C) is push down, the valve is in a closed position, it is possible to insert a lock in the seat (D), avoiding in this way to
open the valve accidentally.