1.013.9059 is a moisture separating filter for the Kaishan CYTC115 drilling rig. Its specific purpose would be to remove condensed water and oil mist from the compressed air before it reaches pneumatic tools or the drilling control system. The CYTC115 is equipped with an on-board JN5.5 or DLGF0.7/8-5.5(B) screw air compressor producing 0.7–0.75 m³/min at 6–8 bar.
