The new AC-A series offers a combination of modular style air preparation equipment, including an energy saving regulator (50% improvement over the regulator in the existing AC line). The filter and lubricator bowls are a double layer design, with the bowl being covered with a transparent bowl guard, making the inside visible from 360. The new spacer, used for modular connection, may be tentatively tightened by fingers, and it is interchangeable with the existing product line of AF-A, AR-A, AL-A and AW-A series.