Model Code Definition

D663 = Base series: ISO4401-05 NG10 installation footprint, ServoJet jet-pipe pilot stage, embedded drive circuit + full-range LVDT spool position closed-loop feedbackMoog Inc.

4002 = Factory exclusive pre-calibrated trim number, fixed nominal flow parameter, locked amplifier gain and original matched pilot component assembly, no extra suffix means standard ±10VDC voltage input + zero overlap spool + NBR general sealing layout

Technical Specifications

Hydraulic Parameters

Rated Flow:92 L/min @35bar single-side differential pressure; peak instantaneous flow 143 L/min @70bar supply differential pressure

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

Full Stroke Step Response:≤22.8ms under standard 210bar supply oil pressureMoog Inc.

Control Precision:Hysteresis＜0.19%FS, Resolution＜0.07%FS, total thermal drift(-20~+80℃)＜2.18%FS

Null Leakage:0.26~1.95 L/min, critical zero-overlap spool design

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

Net Weight:3.12kg

Electrical Parameters

Input Power Supply:24VDC wide-range input(18~32VDC), static standby current ≤650mA

Standard Control Command:Factory default ±10VDC differential analog voltage input; 4~20mA current signal optional via factory recalibration customization

EMC Compliance:Comply with EN55011 industrial EMC standard; standard 7-pin military circular connector with IP65 protection after full cable assembly

Port & Connection Configuration

Hydraulic Interface:Standard ISO4401-05 NG10 hole layout with independent P supply port, A/B actuator control ports, built-in internal T drain plus separated external Y drain, standard cast valve body with full NBR port sealing

Electrical Interface:7-pin circular receptacle integrating power supply, ±10VDC control signal and full-travel LVDT spool feedback signal; double-shielded control cable with single-point grounding inside control cabinet, no digital fieldbus communication interface

Core Functions

1.Patented ServoJet jet-pipe pilot features outstanding contamination resistance vs traditional nozzle-flapper pilot, ensuring stable long-cycle continuous operation under slightly contaminated hydraulic medium。

2.Zero-lap main spool provides excellent linear flow characteristic to support seamless switching of position, velocity and pressure three closed-loop control modes; built-in LVDT closed-loop dynamically compensates spool drift caused by ambient temperature variation。

3.Spring-centered fail-safe neutral structure:main spool automatically returns to center upon power loss to cut off A/B oil path and lock hydraulic cylinder for equipment safety protection。

4.±10VDC voltage input delivers high control precision for short-distance cabinet wiring, stable anti-interference performance for precision closed-loop regulation.

Typical Application

Heavy metallurgical rolling mill hydraulic servo system, large-tonnage forging hydraulic press, full-automatic composite material forming equipment, high-load material fatigue test bench, large precision injection molding core pulling servo control system。

Installation & Maintenance Instructions

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

2.Arrange power cable and shielded control wire inside separated wiring duct to avoid frequency converter harmonic interference to analog control signal; fasten valve with standard flat washers during mounting。

3.Flow gain and null offset are fully pre-calibrated at MOOG factory; only minor 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 blank plugs for spare part storage; store in dry dustproof warehouse to prevent NBR seal ageing and hydraulic fluid leakage。