MOOG 072-559A Two-stage Hydraulic Servo Valve

Technical Specifications

Model:072-559A

Brand:MOOG

Product type:Two-stage Mechanical Feedback Hydraulic Servo Valve

Structure:Two-stage,mechanical feedback,dry torque motor

Max working pressure:35MPa

Rated flow:150L/min

Rated control signal:±40mA

Coil resistance:80Ω±10% (20℃)

Working medium:Mineral hydraulic oil

Mounting standard:ISO 10372

Connector:Multi-pin aviation connector

Function:Precise hydraulic flow regulation,four-way spool control,dynamic closed-loop motion control

Dimension:215mm118mm92mm

Weight:3.6kg

Operating temperature:-29℃ ~ +135℃

Storage temperature:-40℃ ~ +140℃

Relative humidity:10~90% non-condensing

Certification:CE

System compatibility

072-559A belongs to MOOG 72 series servo valve.It fits material fatigue test bench,hydraulic vibration test rig,industrial press and simulation loading equipment,widely used for closed-loop hydraulic motion control.It is spare part for legacy hydraulic equipment overhaul.

Function

072-559A is two-stage mechanical feedback hydraulic servo valve.It adopts dry torque motor and double nozzle flapper pilot stage,with low hysteresis and high resolution.The cantilever spring mechanical feedback structure ensures stable flow output for high precision dynamic hydraulic control.

Installation

Mount valve on hydraulic manifold,fasten mounting bolts to specified torque.Connect aviation signal connector and hydraulic pipeline.Clean oil circuit strictly before commissioning,keep hydraulic oil cleanliness.Take anti-pollution protection during handling.

Interface

‑Multi-pin aviation electrical connector

‑ISO standard hydraulic mounting port

‑Valve identification label

Feature

MOOG 72 series two-stage servo valve.Typical faults:oil contamination blockage,nozzle clogging,torque motor coil aging,internal oil leakage.Inspect oil cleanliness and coil resistance before replacement.

Diagnostic

Fault phenomenon:unstable flow,slow dynamic response,zero drift,internal leakage.Check hydraulic oil cleanliness,electrical wiring,coil resistance and nozzle flapper assembly.

Product Brief

072-559A is MOOG two-stage mechanical feedback hydraulic servo valve with dry torque motor,for high-precision hydraulic flow control,dynamic load testing and old hydraulic equipment renovation.Mainly used for maintenance and replacement of industrial hydraulic systems.Anti-pollution and ESD protection must be followed during handling.