Model Explanation

• D661：MOOG D660 platform ISO05 standard two-stage integrated electronic servo valve product series

• Z：Built-in LVDT spool displacement closed-loop feedback + integrated onboard servo drive amplifier type

• 2712：Custom coding including rated flow, pilot oil configuration, drain mode, mechanical fail-safe centering function, seal specification and electrical definition; rated flow:80L/min@ΔP=35bar per spool land, mechanical fail-safe middle position under power failure

Technical Specifications

Hydraulic Parameters

• Rated Flow:80 L/min (@ΔP=35bar per single spool land)

• Max Working Pressure:P/A/B port:350bar(5000PSI);Internal Y drain T port:210bar(3000PSI);External Y drain T port:350bar(5000PSI)Moog Inc.

• Pilot Oil Mode:External X pilot oil supply, internal Y drain back to tank (defined by 2712 coding)

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

• Valve Net Weight:Approx5.7kg

• Fail-safe characteristic:Power-off mechanical spring centering, spool returns to middle zero position automatically

Electrical Parameters

• Power Supply:DC24V(18～32VDC), overall power consumption≤33WMoog Inc.

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

• Step Response(0~100% full stroke, supply pressure210bar):7～12ms穆格中国

• Electrical Connector:12-pin circular industrial plug (standard configuration for 2712 model)

Environmental Conditions

• Operating Temperature:-20℃～+70℃;Storage & Transportation:-40℃～+85℃

• Humidity:5%~95%RH non-condensing; fully compliant with EN61000 industrial EMC anti-interference specificationMoog Inc.

• Protection Grade:Electrical connector IP65, valve body IP54

Channel & Feedback Configuration

• Hydraulic Port:Standard 4-way P/A/B/T layout following ISO4401-05 mounting dimensionMoog Inc.

• Feedback:Built-in high-precision LVDT displacement sensor inside valve body for real-time spool position closed-loop feedback, no external mechanical feedback rod requiredMoog Inc.

• Extra Port:Independent external X pilot oil inlet;Y drain port fixed internal drain design per model code

Communication & Interface Configuration

• Control Wiring:Hardwire analog signal connection with D137 analog output channel of MSCⅡ control system;control instruction downloaded from MACS programming software to servo valve via analog cable

• Auxiliary Interface:Null trimming potentiometer reserved on side panel for on-site zero calibration;no onboard EtherCAT/Profibus fieldbus, only analog hardwire control modeMoog Inc.

Core Function

1. Convert analog control signal output from D136 main controller into proportional hydraulic flow to drive hydraulic cylinder/hydraulic motor for closed-loop precision regulation of position, speed and loading force of test equipment

2. Built-in LVDT real-time collects actual spool position and feeds back to internal amplifier to form valve internal closed loop, effectively optimize control linearity and restrain zero drift caused by oil temperature and supply pressure fluctuationMoog Inc.

3. Onboard amplifier with overcurrent & short-circuit protection;fault alarm signal can be collected via D137 digital input channel for master control interlock protection

4. Mechanical spring fail-safe design:power failure triggers automatic spool centering to middle position, locking actuator in neutral status for equipment safety protection

5. Side potentiometer realizes field zero fine adjustment to compensate installation error and oil contamination-induced zero offset

Applicable Scenarios

Instructions for Installation and Maintenance

1. Install on standard ISO4401-05 valve manifold;horizontal/vertical mounting available, avoid installation in environment with oil mist, water splash and high-temperature radiation

2. Install 3μm high-pressure filter at P port upstream to prevent ServoJet pilot nozzle blockage from hydraulic oil impurities

3. Inspect and fasten electrical terminals every six months to avoid signal jitter caused by loose wiring;separate analog control cable from high-power power cable in wiring duct for anti-electromagnetic interference

4. Execute valve zero trimming calibration annually;regular inspect A/B/T port external leakage, replace sealing parts once abnormal leakage occurs

5. Keep 24VDC power supply fluctuation within ±10% rated voltage;overvoltage will damage internal integrated amplifier board permanently