The Rexroth R900518087 FD25KA21/B04V is a high-performance, 2-way flow control valve designed for precise regulation of hydraulic flow. As a pressure-compensated valve, it maintains a constant flow rate regardless of variations in system pressure and temperature, ensuring consistent actuator speed and reliable machine operation. This model features a rotary knob for easy adjustment, FKM seals for compatibility with a wide range of hydraulic fluids and higher temperatures, and a special pressure compensator with start-up jump reduction for smoother system performance. Its robust construction and subplate mounting design according to ISO 6263 make it ideal for demanding industrial hydraulic applications.