FD series divider valves are designed for use with series progressive oil and grease lubrication systems. They are of two piece, steel construction with viton O-ring seals. FD valves will serve 2, 3, 4 or 6 points of lubrication. The 2, 3 and 4 point divider valves require .08 cu in to complete one full cycle. An FD-6 divider valve requires .06 cu in to complete one full cycle.