Model Code Definition

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

4318 = fixed factory trim number with preset rated flow, amplifier gain and null offset; base configuration zero-lap four-way spring-centered linear spool, standard NBR sealing

K = customized upgrade code: reinforced valve body internal fixing, anti-shock optimized pilot assembly for high-vibration working environment

Technical Specifications

Hydraulic Parameters

Rated Flow:185 L/min @35bar single-side differential pressure; peak instantaneous flow 276 L/min @70bar supply differential pressure

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

Full Stroke Step Response:≤21.8ms under 210bar rated supply hydraulic pressure

Control Precision:Hysteresis＜0.20%FS, Resolution＜0.070%FS, overall thermal drift(-20~+80℃)＜2.20%FS

Null Leakage:0.23~1.88 L/min, critical zero-overlap linear metering spool design

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

Net Weight:3.31kg

Electrical Parameters

Input Power Supply:24VDC wide-range input(18~32VDC), static standby current ≤750mAMoog Inc.

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

EMC Compliance:Meet EN55011 industrial EMC standard; standard 7-pin military circular connector with IP65 protection after complete 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 mounting surface

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 digital fieldbus communication interface

Core Functions

1.Patented ServoJet jet-pipe pilot provides superior anti-contamination capability compared with traditional nozzle-flapper pilot, stable continuous operation under moderately polluted hydraulic fluid condition; K-version reinforced structure improves shock resistance for vibrating equipment.

2.Zero-lap linear main spool supports seamless switching of position, speed and pressure three closed-loop control modes; onboard LVDT closed-loop dynamically compensates spool position drift caused by wide-range ambient temperature fluctuation.

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

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

Typical Application

Vibration-intensive medium-large hydraulic press master cylinder closed-loop control, heavy-load material fatigue test bench hydraulic system, large tonnage die-casting machine injection and mold clamping precision control, high-vibration industrial hot-press forming 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 inverter harmonic interference on analog control signal; fasten valve with standard flat mounting washers during installation, K model requires torque tightening per factory specified torque value.

3.Flow gain and null offset parameters are fully pre-calibrated at MOOG factory; only minor on-site potentiometer fine adjustment permitted; full 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 oil leakage.