PneumaticPlus SAU Multi-Stage Air Systems provide quality air filtration for compressed air applications with the flexibility to adapt to the changing needs of your system. Its modular design allows for quick, simple connect or disconnect of units to customize your unit to your specific needs, requiring only a screwdriver or hex key. Units can be installed in any location on a single plane without requiring changes to existing piping. SAR Regulators can be mounted either up or down, and the pressure is controlled using the adjustable locking knob. SAF Air Filters remove harmful debris and moisture from your air supply. SAFM Coalescing Filters remove oil vapor and/or mist up to 0.1 microns. They are often used with Piston type compressors where downstream oil carryover is excessive and when longer element life and low pressure drops are a concern. Units are designed to fit National Pipe Thread (NPT) sizing. How It Works: First Stage, the air enters the particulate filter, which utilizes a10 micron cleanable Polyethylene element. In this stage, corrosive moisture, pipe scale, dirt and rust are removed from the air- line protecting the precision parts in the regulator. Second Stage, the fine filtration process removes from the air supply 99.7 percentage of oil aerosols and microscopic particles down to 0.1 micron absolute. Third Stage, the air enters a high-performance regulator, which reduces primary pressure to a desired pressure setting. Installation: Install units so the airflow is in the direction “IN-OUT” as indicated by arrow on the head of the units. SAU Series units provide an easy solution for filtration and precision pressure control to your air system. Please visit our Amazon Store for our complete line of air products. DO NOT INSTALL A POLYCARBONATE BOWL IN PRESSURES THAT EXCEED 150 PSI OR WHERE THERE IS A PRESENCE OF SOLVENTS HARMFUL TO POLYCARBONATE.