Product Details:

MOOG D072-559A two-stage servo valve is a high-performance flow regulator from MOOG D072 series, developed for demanding closed-loop hydraulic motion control systems. This valve adopts dry torque motor drive, double nozzle-flapper pilot stage and mechanical spool feedback structure. The torque motor converts analog electrical command signals into flapper deflection, creating differential pressure to drive the main spool, adjusting hydraulic oil flow rate and direction to precisely control the position, speed and force of hydraulic cylinders and actuators. The spool and sleeve assembly is finished by ultra-precision grinding technology, delivering low hysteresis, high linearity and excellent repeatability. The mechanical feedback structure stabilizes spool position and provides fast dynamic response for high precision hydraulic control.

This high precision flow component maintains stable working performance under high rated pressure, continuous mechanical vibration and fluctuating ambient temperature. It responds rapidly to incoming control signals and keeps minimal control deviation. MOOG D072-559A two-stage servo valve is widely used in static and dynamic material fatigue testing machines, aerospace hydraulic simulation test benches, heavy metal forming presses, metallurgical rolling production lines and automated hydraulic manufacturing machinery.

The nozzle-flapper pilot stage is sensitive to hydraulic fluid contamination. Regular hydraulic oil inspection and filter replacement are essential. Fine solid particles suspended in hydraulic fluid will scratch the nozzle and precision matching surfaces of spool and sleeve, leading to internal leakage and control drift. Every MOOG D072-559A flow regulator undergoes complete factory performance tests before shipment, including flow characteristic curve test, frequency response test and internal leakage inspection. Strict quality control ensures stable and repeatable precision for closed-loop hydraulic control applications.

Specifications:

Brand: MOOG

Model: D072-559A

Product category: Two-stage electro-hydraulic servo valve

Drive principle: Dry torque motor, double nozzle flapper with mechanical feedback

Feature: Fast dynamic response, low hysteresis, high resolution, precise flow regulation

Application: High precision closed-loop hydraulic system, material test machine, metal forming press, aerospace test bench

Working medium: Fully filtered industrial hydraulic oil

Working environment: Industrial site with vibration and temperature variation