Model Code Definition

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

4009 = Exclusive factory trim number with fixed rated flow, locked amplifier gain and null offset pre-calibration; bare code matches standard ±10VDC analog input, zero-lap 4-way spring centered spool and standard NBR sealing configuration; complete full model extends with custom suffix for seal/connector/drain options.

Technical Specifications

Hydraulic Parameters

Rated Flow:148 L/min @35bar single-side differential pressure; peak instantaneous flow 222 L/min @70bar supply differential pressure

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

Full Stroke Step Response:≤19.5ms under 210bar rated supply oil pressure

Control Precision:Hysteresis＜0.15%FS, Resolution＜0.06%FS, overall thermal drift(-20~+80℃)＜1.95%FS

Null Leakage:0.20~1.72 L/min, critical zero-overlap linear flow spool design

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

Net Weight:3.22kg

Electrical Parameters

Input Power Supply:24VDC wide-range input(18~32VDC), static standby current ≤700mA

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

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

Port & Connection Configuration

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

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

Core Functions

1.Patented ServoJet jet-pipe pilot owns superior anti-pollution capability vs traditional nozzle-flapper pilot, guaranteeing stable long-term continuous running under moderately contaminated hydraulic fluid environmentMoog Inc..

2.Zero-lap main spool delivers excellent linear flow characteristic to support seamless switching among position, speed and pressure three closed-loop control modes; onboard LVDT closed-loop dynamically offsets spool position drift caused by ambient temperature fluctuation.

3.Spring-centered fail-safe neutral structure:main spool automatically returns to middle position once power cut off to lock A/B oil circuit and fix hydraulic cylinder for equipment overload safety protection.

4.Factory customized amplifier gain matched for medium load variable working condition, ±10VDC analog input provides outstanding anti-interference performance for short-distance cabinet wiring and high-precision closed-loop regulation.

Typical Application

Medium tonnage hydraulic forming press cylinder servo control, metal specimen medium-frequency fatigue test bench, medium-size die-casting machine clamping & injection closed-loop hydraulic system, composite material medium-pressure hot forming precision hydraulic equipment.

Installation & Maintenance Instructions

1.Mount 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 ducts to avoid frequency converter harmonic interference on analog control signal; fasten valve with standard flat mounting washers during installation.

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

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