The MOOG D661-393A is a high-performance, two-stage electrohydraulic servo-proportional directional control valve engineered for precision and reliability in demanding industrial applications. This robust unit features a pilot-operated main spool combined with integrated valve electronics, ensuring dynamic response and highly accurate fluid control. Designed for seamless system integration, it utilizes an industry-standard ISO 4401-style subplate mounting interface. The valve is built to withstand harsh environments, featuring a durable blue-painted valve body, a polished steel pilot valve housing, and a stainless steel electronics housing. Manufactured by MOOG GmbH in Germany, the D661-393A (Type Code S30K05MLN6A) represents the pinnacle of modern electrohydraulic control technology.