The adjustable turn knob can be pulled out to unlock and adjust the pressure and once it is set you can press in on the knob and it will lock in place. This is a directional flow regulator & filter and it is marked IN on the inlet side and OUT on the outlet side showing what way the air needs to flow. The filter attached is a 5 micron filter which will remove any water droplets from your air line. The filter element is surrounded by a poly bowl with a commercial automatic float drain on the bottom. This must be mounted vertical so the drain is pointing down. Regulate air pressure between 1-16bar.
Working pressure input up to 16 bar/ 230 PSI/ 1.6 MPa
Working pressure output up to 12 bar/ 175 PSI/ 1.2MPa
Flow rate: 1 600 l / min
Working temperature up to 60° C
Filtration insert 5 μm