Model Code Definition

D663 = Base series: ISO4401-05 NG10 installation dimension, patented ServoJet jet-pipe pilot stage, embedded drive circuit + full-range LVDT spool position closed-loop feedback

4006 = Custom factory trim number with fixed rated flow, preset flow gain and null offset parameters, matched pilot component calibration for injection molding working condition; no extra suffix corresponds to standard ±10VDC control signal, critical zero-lap spool and regular NBR sealing layout

Technical Specifications

Hydraulic Parameters

Rated Flow:105 L/min @35bar single-side differential pressure; peak instantaneous flow 161 L/min @70bar supply differential pressure

Max Working Pressure:P/A/B control ports up to 350bar; internal T drain ≤50bar; standalone external Y drain can bear full 350bar system pressure

Full Stroke Step Response:≤21.7ms under standard 210bar supply oil pressure

Control Precision:Hysteresis＜0.17%FS, Resolution＜0.065%FS, overall thermal drift(-20~+80℃)＜2.12%FS

Null Leakage:0.24~1.89 L/min, critical zero-overlap linear flow spool design

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

Net Weight:3.16kg

Electrical Parameters

Input Power Supply:24VDC wide-range input(18~32VDC), static standby current ≤670mA

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

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

Port & Connection Configuration

Hydraulic Interface:Standard ISO4401-05 NG10 port layout including independent P supply port, A/B actuator control ports, separated internal T drain plus external Y drain, cast valve body fitted 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 cabinet grounding, no digital fieldbus communication interface

Core Functions

1.Patented ServoJet jet-pipe pilot has superior contamination resistance versus traditional nozzle-flapper design, stable continuous operation against slight oil impurity from long-running injection molding hydraulic station.

2.Zero-lap main spool delivers outstanding linear flow property to realize seamless switching among injection speed, packing pressure and backpressure three closed-loop control modes; built-in LVDT closed-loop dynamically compensates spool position drift induced by ambient temperature variation.

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

4.Customized internal amplifier gain matching injection molding rapid load fluctuation, ±10VDC analog input features excellent anti-interference performance for short-distance cabinet wiring and high-precision molding process control.

Typical Application

Large precision injection molding machine (injection speed, packing pressure, melt backpressure & screw retraction four-in-one servo control), medium tonnage thermosetting plastic forming equipment, composite material compression molding hydraulic servo system.

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 cable and shielded control wire in different wiring ducts to avoid frequency converter harmonic interference on analog control signal; mount valve with standard flat washers during installation.

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

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