Model Code Definition

D663 = D660 core series, NG10 ISO4401-05 installation dimension, ServoJet jet-pipe pilot construction, integrated drive amplifier + full-travel LVDT spool displacement closed-loop feedback architecture

4769 = exclusive factory fixed trim number defining rated flow, amplifier gain and null offset; base configuration four-way spring-centered spool with 10% positive overlap, standard NBR sealing compound; optional suffix modifications for customized circular connector, fluorocarbon seals and drain port layout adjustment.

Technical Specifications

Hydraulic Parameters

Rated Flow:278 L/min @35bar single-side differential pressure; peak instantaneous flow 419 L/min @70bar supply differential pressure

Max Working Pressure:P/A/B main control ports rated up to 350bar; internal T drain limited ≤210bar; standalone external Y drain supports full 350bar system pressure

Full Stroke Step Response:≤25.8ms under 210bar nominal supply hydraulic pressure

Control Precision:Hysteresis＜0.21%FS, Resolution＜0.072%FS, overall thermal drift(-20~+80℃)＜2.28%FS

Null Leakage:0.29~2.09 L/min based on 10% positive overlap metering spool design

Working Medium:Anti-wear mineral hydraulic oil, fluid cleanliness NAS6~7 / ISO4406 17/14/11, permissible fluid temperature -20℃~+80℃

Net Weight:3.40kg

Electrical Parameters

Input Power Supply:24VDC wide-range input(18~32VDC), static standby operating current ≤770mA

Standard Control Command:Factory preset ±10VDC differential voltage input; ±10mA /4~20mA current signal available via factory parameter re-calibration

EMC Compliance:Conforms to EN55011 industrial EMC specification; standard 7-pin military circular connector with IP65 protection after complete cable assemblyMoog Inc..

Port & Connection Configuration

Hydraulic Interface:ISO4401-05 NG10 standard hole pattern with independent P supply port, A/B actuator control ports, separated internal T drain and dedicated external Y drain, factory pre-installed NBR sealing gaskets on mounting surface

Electrical Interface:7-pin circular receptacle integrating 24V power supply, ±10VDC control command and full-stroke LVDT spool feedback signal; double-shielded control cable required with single-point cabinet grounding, no digital fieldbus communication interfaceMoog Inc..

Core Functions

1.Patented ServoJet jet-pipe pilot delivers superior contamination resistance vs conventional nozzle-flapper pilot, enabling continuous steady operation under moderately contaminated hydraulic fluid environment.

2.10% positive overlap main spool optimized for medium-high flow stable pressure/force closed-loop regulation; onboard LVDT closed-loop dynamically compensates spool position shift caused by wide-range ambient temperature variation.

3.Spring-centered fail-safe neutral construction: main spool automatically returns to center upon power loss to block A/B oil passages and lock hydraulic cylinder for equipment overload safety protection.

4.Factory fixed amplifier gain matched for medium-high flow heavy-duty variable working conditions; ±10VDC analog input provides excellent anti-interference for medium-long wiring precision closed-loop control.

Typical Application

Medium-tonnage hydraulic forging press cylinder force closed-loop control, automotive component fatigue test bench hydraulic system, medium-size die-casting machine mold clamping & injection precision control, metallurgical auxiliary rolling equipment positioning control, medium composite hot-forming hydraulic machinery.

Installation & Maintenance Instructions

1.Install 3μm high-pressure inline precision filter on upstream supply pipeline; replace initial filter cartridge after 15 working days of equipment commissioning startup.

2.Separate power cables and shielded control wires inside independent wiring ducts to avoid inverter harmonic interference to analog control signals; mount valve with standard flat washers following factory specified tightening torque.

3.Flow gain and null offset parameters are fully pre-calibrated at MOOG factory; only minor on-site potentiometer fine tuning permitted; complete disassembly of ServoJet pilot and main spool assembly is strictly forbidden.

4.Seal all unused hydraulic ports with original factory blank plugs for spare part storage; preserve inside dry dustproof warehouse to prevent NBR seal ageing and hydraulic fluid leakage.