MOOG 72-1202-10 Two-stage Mechanical Feedback Hydraulic Servo Valve

Technical Specifications

Model:72-1202-10

Brand:MOOG

Product type:Two-stage Mechanical Feedback (MFB) Hydraulic Servo Valve

Structure:Two-stage amplification,dry torque motor,double nozzle flapper pilot stage

Max working pressure:350bar

Rated control signal:±40mA

Coil resistance:80Ω±10% (20℃)

Working medium:Mineral hydraulic oil

Connector:Multi-pin aviation electrical connector

Function:Convert analog electric signal into proportional hydraulic flow,closed-loop control for steam turbine governing valve

Dimension:240mm125mm102mm

Weight:3.5kg

Operating temperature:-20℃ ~ +80℃

Storage temperature:-40℃ ~ +130℃

Relative humidity:10~90% non-condensing

Certification:CE

System compatibility

72-1202-10 belongs to MOOG 72 series servo valve.It is widely used in steam turbine DEH control system,actuating the main valve and regulating valve of large power units.It is spare part for power plant hydraulic control equipment overhaul.

Function

72-1202-10 is two-stage mechanical feedback servo valve.It adopts dry torque motor and double nozzle flapper pilot stage,features high dynamic response and low hysteresis.Mechanical feedback spring realizes spool position feedback,output hydraulic flow proportional to input current for turbine valve precise adjustment.

Installation

Mount valve on standard hydraulic manifold,tighten mounting bolts to specified torque.Connect hydraulic oil pipeline and electrical control wiring.Complete oil flushing,parameter calibration and performance test before commissioning.Keep clean during handling,prevent oil contamination.

Interface

‑Multi-pin aviation electrical connector

‑Hydraulic P,T,A,B oil ports

‑Valve identification label

Feature

MOOG 72 series high reliability turbine dedicated servo valve.Typical faults:nozzle blockage,torque motor coil damage,spool sticking,internal leakage.Inspect oil cleanliness and coil resistance before replacement.

Diagnostic

Fault phenomenon:output flow abnormal,zero drift,slow response,no action.Check oil contamination,electrical wiring,coil status and spool condition.

Product Brief

72-1202-10 is MOOG two-stage mechanical feedback hydraulic servo valve with fast dynamic performance,specially applied to steam turbine DEH governing control system,suitable for power plant hydraulic system maintenance and replacement.Strict oil cleanliness control is required in service.