Model Code Definition

D662 = Core series, NG16 ISO4401-07 installation dimension, ServoJet jet-pipe pilot construction, onboard integrated servo amplifier without external drive unit

Z4384 = Exclusive factory flow trim code, pre-set rated flow value, fixed null offset, locked amplifier gain and matched internal pilot component parameters

K = Wide-temperature enhanced electronic configuration with PCB anti-drift calibration for harsh temperature variation environments

Technical Specifications

Hydraulic Parameters

Rated Flow:242 L/min @35bar single-land differential pressure; peak instantaneous flow 386 L/min @70bar supply differential pressure

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

Full Stroke Step Response:≤25.2ms under standard 210bar supply pressure

Control Precision:Hysteresis＜0.19%FS, Resolution＜0.075%FS, full-range thermal drift(-20℃~+60℃)＜2.05%FS

Null Leakage:0.48~3.0 L/min

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

Net Weight:3.77kgMoog Inc.

Electrical Parameters

Input Power:24VDC wide range input(18~32VDC), static standby current ≤682mA

Standard Command Signal:±10VDC differential analog input; ±10mA /4~20mA current signal available via factory special order

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

Port & Connection Configuration

Hydraulic Interface:Standard ISO4401 NG16 mounting hole layout, independent P supply port, A/B actuator control ports, built-in internal T drain and separated Y external drain port

Electrical Interface:7-pin circular receptacle integrating power supply, analog command signal and full-range LVDT feedback wiring; double-shielded control cable with single-point grounding inside control cabinet

Control Mode:Pure analog closed-loop regulation, no digital fieldbus communication interface

Core Functions

1.Patented ServoJet jet-pipe pilot delivers superior anti-pollution capability vs conventional nozzle-flapper pilot, ensuring stable long-term operation under moderately contaminated hydraulic oil in heavy-duty industrial sites.

2.Integrated matched amplifier cooperates with full-spool LVDT closed-loop to automatically compensate neutral shift caused by ambient temperature fluctuation; K-type optimized circuit greatly improves zero-point stability under wide temperature span.

3.Spring-centered fail-safe spool design:main spool mechanically returns to neutral upon power failure to block A/B oil channels and lock actuator position for equipment safety protection.

4.Optimized internal runner maintains linear flow gain, supports flexible switching among position, velocity and pressure three closed-loop control modes.

Typical Application

Large tonnage hot extrusion production line, heavy metal rolling mill tension control system, automotive large mold die-casting clamping hydraulic system, high-load hydraulic fatigue test bench, heavy-duty hydraulic forging press 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 troughs to avoid frequency converter harmonic interference to analog control signal.

3.Null bias and flow gain are fully pre-calibrated at MOOG original factory; only slight 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 dedicated blank plugs during spare stock storage; store inside dry dustproof warehouse to prevent FKM fluororubber seal ageing and medium leakage.