Model Code Definition

D663 = D660 core product range, NG10 ISO4401-05 installation dimension, ServoJet jet-pipe pilot construction, built-in amplifier + full-range LVDT spool displacement closed-loop feedback structureMoog Inc.

4317 = exclusive factory preset trim number with fixed rated flow, amplifier gain and null offset; base configuration uses zero-lap four-way spring-centered spool with standard NBR sealing; complete full model extends suffix codes for customized connector, sealing material and drain options.

Technical Specifications

Hydraulic Parameters

Rated Flow:172 L/min @35bar single-side differential pressure; peak instantaneous flow 258 L/min @70bar supply pressure

Max Working Pressure:P/A/B main ports up to 350bar; internal T drain ≤50bar; standalone external Y drain withstand full 350bar system pressureMoog Inc.

Full Stroke Step Response:≤21.2ms under 210bar rated supply hydraulic pressure

Control Precision:Hysteresis＜0.19%FS, Resolution＜0.068%FS, overall thermal drift(-20~+80℃)＜2.15%FS

Null Leakage:0.22~1.81 L/min, critical zero-overlap linear metering spool design

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

Net Weight:3.27kg

Electrical Parameters

Input Supply:24VDC wide-range input(18~32VDC), static standby current ≤730mA

Standard Control Signal:Factory preset ±10VDC differential voltage; ±10mA current input optional via factory recalibrationMoog Inc.

EMC Standard:Compliant with EN55011 industrial EMC specification; standard 7-pin military circular connector with IP65 protection after cable assembly.

Port & Connection Configuration

Hydraulic Interface:ISO4401-05 NG10 standard hole layout including independent P supply port, A/B actuator control ports, separated internal T drain and standalone external Y drain, factory pre-installed NBR sealing gaskets for all mounting surfacesMoog Inc..

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

Core Functions

1.Patented ServoJet jet-pipe pilot features outstanding anti-pollution capability vs conventional nozzle-flapper pilot, enabling long-term steady continuous operation under moderately contaminated hydraulic fluid environment.

2.Zero-lap linear main spool supports seamless switching among position, speed and pressure triple closed-loop control; onboard LVDT closed-loop dynamically compensates spool position drift induced by wide-range ambient temperature fluctuationMoog Inc..

3.Spring-centered fail-safe neutral construction: main spool automatically returns to middle position upon power failure to lock A/B oil path and fix hydraulic cylinder for overload safety protection.

4.Factory fixed amplifier gain optimized for medium-high flow variable-load operating condition; ±10VDC analog input delivers excellent anti-interference for medium-distance wiring high-precision closed-loop regulation.

Typical Application

Medium-large tonnage hydraulic press master cylinder closed-loop control, large-specimen material tensile & fatigue test bench hydraulic system, medium-large die-casting machine injection & mold clamping precision control, large composite hot-press forming hydraulic equipment.

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.Arrange power cables and shielded control wires inside separated wiring ducts to avoid inverter harmonic interference to analog control signals; fix valve with standard flat washers during mounting.

3.Flow gain and null bias parameters are fully pre-calibrated at MOOG factory; only slight on-site potentiometer fine-tuning is allowed; 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 inventory; store in dry dustproof warehouse to prevent NBR seal ageing and hydraulic oil leakage.