Service unit FRC-3/4-D-O-DI-MAXI Filter regulator/lubricator combination, 40 ?m filter, with metal bowl guard. With manual condensate drain. Without pressure gauge. With directly-controlled pressure regulator. Size=Maxi, Series=D, Actuator lock=Rotary knob with lock, Assembly position=Vertical +/- 5?, Condensate drain=manual rotary