Model Code Definition

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

5304 = exclusive factory fixed trim number defining rated flow, amplifier gain and null offset, base four-way spring-centered spool with 10% positive overlap

K = customized factory option: optimized null drift compensation, reinforced body seal structure for heavy-duty continuous running, anti-vibration amplifier internal layout.

Technical Specifications

Hydraulic Parameters

Rated Flow:412 L/min @35bar single-side differential pressure; peak instantaneous flow 576 L/min @70bar supply differential pressure

Max Working Pressure:P/A/B main control ports rated up to 350bar; internal T drain limited ≤210bar; standalone external Y drain supports full 350bar system pressure

Full Stroke Step Response:≤31.2ms under 210bar nominal supply hydraulic pressure

Control Precision:Hysteresis＜0.28%FS, Resolution＜0.09%FS, overall thermal drift(-20~+80℃)＜2.75%FS

Null Leakage:0.38~2.52 L/min based on 10% positive overlap metering spool design

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

Net Weight:3.58kg

Electrical Parameters

Input Power Supply:24VDC wide-range input(18~32VDC), static standby operating current ≤850mA

Standard Control Command:Factory preset ±10VDC differential voltage input; ±10mA /4~20mA current signal available via factory parameter re-calibration

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

Port & Connection Configuration

Hydraulic Interface:ISO4401-05 NG10 standard hole pattern with independent P supply port, A/B actuator control ports, split internal T drain and dedicated external Y drain, factory pre-installed NBR sealing gaskets on mounting surface

Electrical Interface:7-pin circular receptacle integrating 24V power supply, ±10VDC control command and full-stroke 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 delivers superior contamination resistance vs conventional nozzle-flapper pilot, enabling continuous steady operation under moderately contaminated hydraulic fluid environment.

2.10% positive overlap main spool optimized for extra-high flow stable pressure/force closed-loop regulation; onboard LVDT closed-loop dynamically compensates spool position shift caused by wide-range ambient temperature variation, K suffix further improves long-running null stability.

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

4.Factory fixed amplifier gain matched for extra-high flow heavy-duty variable working conditions; ±10VDC analog input provides excellent anti-interference for medium-long wiring precision closed-loop control.

Typical Application

Ultra-large hydraulic forging press master cylinder force closed-loop control, heavy metallurgical hot rolling mill hydraulic actuator positioning control, oversized multi-channel material fatigue test bench high-flow hydraulic drive, large tonnage die-casting equipment clamping & injection precision control, oversized aerospace composite hot-forming hydraulic 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 cables and shielded control wires inside independent wiring ducts to avoid inverter harmonic interference to analog control signals; mount valve with standard flat washers following factory specified tightening torque.

3.Flow gain and null offset parameters are fully pre-calibrated at MOOG factory; only minor on-site potentiometer fine tuning permitted; 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 part storage; preserve inside dry dustproof warehouse to prevent NBR seal ageing and hydraulic fluid leakage.