The Sun FDFA-LAN is a high-performance, spool-type, screw-in hydraulic cartridge valve designed to function as both a flow divider and a flow combiner. In its dividing mode, it splits the inlet flow from port 3 into two nominally equal streams at ports 2 and 4. Conversely, in its combining mode, it merges the flows from ports 2 and 4 into a single flow at port 3. This valve is crucial for applications requiring synchronized operation of multiple actuators, such as hydraulic cylinders or motors, as it maintains a consistent flow division ratio even with varying load pressures. The FDFA-LAN model specifically includes a free reverse flow function, allowing unrestricted flow from ports 2 and 4 back to port 3. Its robust construction and reliable performance make it a preferred choice for demanding industrial and mobile hydraulic systems.