ROTORK > PRODUCT > ROTORK Description Air Filter Regulator Air filter regulator suitably reduce plant's main air supply pressure and supplies to valve positioner(s) or control device(s). Design features Stable Output and repeatability. Provides constant control under variable flow rates and supply pressures. Relief flow capability. Discharges pressure if outer pressure is higher than set pressure. Light weight and compact size. Reduces installation costs. 5 micron filter. Protects pneumatic instruments from dirty air. Manual or Auto Draining Option Catalog Download