Model Code Definition

D663 = Core D660 series, NG10 ISO4401-05 installation dimension, ServoJet jet-pipe pilot architecture, onboard amplifier + full-travel LVDT spool closed-loop feedback designMoog Inc.

Z = Factory custom modification identifier for non-standard flow gain and null characteristic preset

4307 = Exclusive fixed trim number specifying rated flow, amplifier gain and factory preset null offset; four-way spring-centered spool with 10% positive overlap flow profile

K = Custom option: high-temperature reinforced composite sealing, anti-vibration internal amplifier layout, improved long-running thermal zero stability under fluctuating ambient temperature

Technical Specifications

Hydraulic Parameters

Rated Flow:302 L/min @35bar single-side differential pressure; peak instantaneous flow 428 L/min @70bar supply differential pressure

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

Full Stroke Step Response:≤27.2ms under standard 210bar supply hydraulic pressure

Control Precision:Hysteresis＜0.24%FS, Resolution＜0.078%FS, overall thermal drift(-20~+80℃)＜2.28%FS

Null Leakage:0.38~2.05 L/min due to 10% positive overlap spool structure

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

Net Weight:3.60kg

Electrical Parameters

Input Power Supply:24VDC wide input range(18~32VDC), static standby operating current ≤805mAMoog Inc.

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

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

Port & Connection Configuration

Hydraulic Interface:ISO4401-05 NG10 standard hole layout with independent P supply port, A/B actuator control ports, split internal T drain and dedicated external Y drain, factory pre-installed fluorocarbon composite mounting gaskets matching K suffix specification

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 versus conventional nozzle-flapper pilot, ensuring stable continuous operation under moderately contaminated hydraulic fluid environment.

2.10% positive overlap main spool realizes stable medium-flow pressure/force closed-loop regulation; onboard LVDT closed-loop dynamically offsets spool displacement drift induced by wide-range temperature variation, K suffix further minimizes long-term zero drift during uninterrupted heavy-load operation.

3.Spring-centered fail-safe neutral design: main spool automatically returns to central position upon power loss to cut off A/B oil passages and lock hydraulic actuator for equipment overload safety protection.

4.Factory fixed amplifier gain optimized for medium-flow heavy-duty working conditions; ±10VDC analog input provides outstanding anti-interference performance for medium-long wiring precision closed-loop control.

Typical Application

Medium-large tonnage hydraulic forging press master cylinder force closed-loop control, metallurgical hot strip mill hydraulic cylinder positioning control, oversized multi-spec material fatigue test bench medium-high flow hydraulic drive, large die-casting machine clamping & injection precision control, aerospace composite component hot-forming hydraulic control system.

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 cables and shielded control wires inside separated wiring ducts to avoid inverter harmonic interference to analog control signals; fasten valve with standard flat washers per factory specified tightening torque during installation.

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

4.Seal all unused hydraulic ports with original factory blank plugs for spare part storage; store inside dry dustproof warehouse to prevent composite seal ageing and hydraulic oil leakage.