Product Details:

MOOG D633-419B belongs to MOOG D633 series direct drive servo valve, adopting permanent magnet linear force motor design and no pilot oil supply required. The B suffix represents revised upgraded internal assembly version compared with A version. Integrated built-in drive electronics and spool position closed-loop feedback, it can directly receive analog command signals to accurately adjust hydraulic flow. The linear force motor directly drives the valve spool, delivering pressure-independent dynamic response and low power consumption at hydraulic null position. When power supply cuts off, the spool returns to spring-centered position to protect hydraulic equipment.

This servo valve features high resolution, low hysteresis and excellent repeatability. MOOG D633-419B direct drive servo valve is widely used in static and dynamic material fatigue testing machines, aerospace hydraulic simulation test benches, metal forming presses and automated hydraulic manufacturing machinery. It can precisely control position, velocity and force of hydraulic actuators for high performance closed-loop hydraulic control systems.

The built-in filter structure reduces fluid contamination sensitivity. Every MOOG D633-419B 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: D633-419B

Product category: Direct drive electro-hydraulic servo valve

Drive principle: Permanent magnet linear force motor, integrated spool position closed loop control

Mounting standard: ISO4401 size 03

Max working pressure: 350 bar for P/A/B ports

Feature: No pilot oil required, fast dynamic response, low hysteresis, power-off spring centred

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