The P785 (QF5) is a directional control device. It comprises two sections to regulate pressure and to change direction. It is suitable for use with power chucks and pneumatic cylinders. It also can be used with other clamping tools, as well as air-water separator, filter and oil mist lubricator as air line. The valve is a compact, reliable in changing direction, flexible in regulating pressure and indeed a convinent-to-use piece of equipment.