Model Explanation

D661：MOOG D660 platform ISO05 standard two-stage integrated electronic servo valve series with ServoJet pilot structureMoog Inc.

Z：Built-in internal LVDT spool displacement closed-loop feedback + fully integrated onboard servo drive amplifier configurationMoog Inc.

2736：Base specification coding: rated flow 120L/min@ΔP=35bar per single spool land, external independent X pilot oil supply, external Y drain design, power-off mechanical spring auto-centering fail-safe structure, standard 12-pin circular electrical connector

E：Enhanced customized upgrade: high-low temperature resistant fluorine rubber sealing + optimized pilot runner anti-clogging structure, strengthened amplifier wide-temperature circuit design for harsh industrial environment

Technical Specifications

Hydraulic Parameters

Rated Flow：120 L/min (@ΔP=35bar per single spool land)

Max Working Pressure：P/A/B main ports:350bar(5000PSI); external Y drain T port:350bar(5000PSI)Moog Inc.

Pilot Mode：External independent X pilot oil inlet, external Y drain to tank

Working Medium：Mineral hydraulic oil complying with DIN51524/ISO11158, recommended oil cleanliness NAS6~7

Net Weight：Approx5.8kg

Fail-safe Function：Power-loss mechanical return spring, spool automatically returns to neutral zero position to lock actuator position

Electrical Parameters

Power Supply：DC24V (18～32VDC), total power consumption ≤35WMoog Inc.

Standard Control Command：Differential ±10VDC analog input; optional ±10mA current signal customization

Full Stroke Step Response(0~100%, supply pressure210bar):7~11ms

Electrical Connector：12-pin circular industrial plug

Environmental Conditions

Operating Temperature：-30℃～+75℃; Storage & Transportation:-45℃～+90℃(E-version wide temp upgrade vs standard model)

Humidity：5%~95%RH non-condensing; fully complies with EN61000 industrial EMC anti-interference standard

Protection Grade：Electrical connector IP65, valve body IP54

Channel & Feedback Configuration

Hydraulic Port：Standard 4-way P/A/B/T layout following ISO4401-05 manifold installation dimension, external independent X pilot oil port and Y drain port reserved

Feedback Mode：Built-in high-precision non-contact internal LVDT displacement sensor for real-time spool closed-loop feedback, no external mechanical feedback rod requiredMoog Inc.

Auxiliary Hydraulic Port：Separate external X pilot supply port and external Y drain port defined by model coding

Communication & Interface Configuration

Control Wiring：Shielded analog hardwire connection with D137 analog output channel of MSCⅡ control system; control instructions compiled on MACS programming software and transmitted to servo valve via screened signal cable

Auxiliary Interface：Side-mounted zero trimming potentiometer for field on-site zero-offset calibration; no onboard EtherCAT/Profibus fieldbus, only analog hardwire control mode

Core Function

Convert analog control signals from D136 main controller into proportional hydraulic flow to drive hydraulic actuators for closed-loop precise regulation of position, movement speed and test load; E-type wide-temperature design adapts to high/low temperature workshop and outdoor test station working conditions.

Internal LVDT collects real-time actual spool position and feeds back to onboard integrated amplifier to form valve inner closed loop, effectively improving control linearity and restraining zero drift caused by oil temperature and supply pressure fluctuationMoog Inc..

Built-in overcurrent, short-circuit and reverse connection protection for integrated amplifier; valve abnormal fault signals can be collected via D137 digital input DI channel for master control fault alarm and equipment safety interlock.

Mechanical spring fail-safe design: spool auto-centering after power cut to lock hydraulic cylinder, prevent test bench runaway accident and guarantee equipment operation safety.

E-grade fluorine rubber sealing greatly improves high-temperature hydraulic oil ageing resistance and anti-leakage performance; optimized pilot channel structure reduces blocking risk caused by slight oil contamination, extending continuous service life.

Applicable Scenarios

Large-flow regulation of steam turbine EH electro-hydraulic speed control system; heavy-load fatigue testing of automobile suspension and chassis structural parts; large-stroke position closed-loop control of aerospace hydraulic actuator test rig; high-pressure precision forming control of large hydraulic press; static/dynamic mechanical property test of metal alloy and composite material testing machine.

Instructions for Installation and Maintenance

Install on standard ISO4401-05 hydraulic manifold, horizontal/vertical installation allowed; avoid mounting in cabinet area with dense hydraulic oil mist, water splash and intense high-temperature radiation.

Install 3μm high-pressure precision filter at P port upstream and X pilot oil inlet to protect ServoJet pilot nozzle from impurity blockageMoog Inc..

Inspect and retighten all electrical wiring terminals every six months to eliminate signal fluctuation caused by loose wiring; separate shielded analog control cable from high-power power cable inside wiring duct to reduce electromagnetic interference.

Complete full-range zero calibration of the servo valve once per year; regularly inspect external leakage of A/B/T/X/Y ports, replace E-spec fluorine rubber sealing parts when leakage occurs.

Keep input 24VDC power supply voltage fluctuation within ±10% rated range; overvoltage will cause permanent damage to internal integrated amplifier board.