The RAF OG3 is a hydraulic valve operated by line pressure. The valve is a 3-W On/Off control valve that can be commanded from a remote location, by a hydraulic control relay - (Galit).
The valve is fully open when the control chamber is disconnected from line pressure and vented into the atmosphere. The 3-W Galit configuration with Raphael’s patented diaphragm enables smooth and precise downstream pressure control.