10
Operation
AOK 50 works with compressed air, which is in the system from which we wish to drain the
condensate. The AOK 50 minimum operating pressure is 8 bar (116 psi). When there is no pressure in
the system the valve is normally open. The valve opens automatically if the pressure drops to below
1 bar (14 psi). The valve can also open at higher pressure. The opening of the valve depends on many
factors, such as wear and the speed of the pressure drop.
The condensate enters the AOK 50 through the INLET connector, which is located on the upper side
of the housing. Condensate flows into a reservoir. When the level of the condensate rises the float is
lifted. When the condensate level is high enough, the float unblocks a nozzle and seal thus
pressurizing the interior of the servo valve. The pressure pushes a piston, which opens and closes the
OUTLET connector. Through this OUTLET, the condensate is discharged from the reservoir. When the
level of the condensate drops the float drops whit it and closes the nozzle. Air enters the servo valve
through a side hole and then the piston returns to its start position and thus closes the drain OUTLET.
