D662 = Core series, NG16 ISO4401-07 mounting dimension, ServoJet jet-pipe pilot structure, onboard integrated servo amplifier without external drive moduleZ4378 = Factory custom flow trim code, defines fixed rated flow value, original null setting, fixed flow gain and matched internal pilot component parametersK = Wide-temperature enhanced version, optimized PCB circuit with temperature compensation to reduce neutral drift under -20℃~+60℃ environment fluctuation

Rated Flow:215 L/min @35bar single-land differential pressure; peak instantaneous flow 348 L/min @70bar supply differential pressureMax Working Pressure:P/A/B main control ports 350bar; internal T drain ≤50bar; independent Y external drain bears full 350bar pressureFull Stroke Step Response:≤23.8ms under standard 210bar supply pressureControl Precision:Hysteresis＜0.19%FS, Resolution＜0.075%FS, full-range temperature drift(-20℃~+60℃)＜2.1%FSNull Leakage:0.45~2.9 L/minWorking Medium:Mineral anti-wear hydraulic oil, cleanliness NAS6~7 / ISO4406 17/14/11, fluid operating temperature -20℃~+80℃Net Weight:3.75kg

Input Power:24VDC wide input range(18~32VDC), static standby current ≤670mAStandard Command Signal:±10VDC differential analog input; optional ±10mA /4~20mA current signal upon factory customizationEMC Compliance:EN55011 industrial electromagnetic standard, standard 7-pin military circular connector with IP65 protection after complete cable installationMoog Inc.

Hydraulic Interface:Standard ISO4401 NG16 mounting hole layout, separate P supply port, A/B actuator control ports, built-in T drain and standalone Y external drain portElectrical Interface:7-pin circular receptacle integrating power supply, analog command signal and full-travel LVDT feedback wiring; double-shielded control cable with single-point grounding at control cabinetControl Mode:Pure analog closed-loop regulation, no digital fieldbus communication interface

1.Patented ServoJet jet-pipe pilot delivers superior anti-contamination performance compared with traditional nozzle-flapper pilot, enabling stable continuous operation under moderately contaminated hydraulic oil in harsh workshop environmentMoog Inc..2.Integrated matched amplifier plus full-range LVDT closed-loop structure automatically compensates neutral shift caused by ambient temperature change; K-type optimized circuit greatly improves long-term stability under wide temperature variation.3.Spring-centered mechanical reset structure:main spool automatically returns to neutral position once power fails, cutting off A/B oil circuit to lock actuator position for equipment safety protection.4.Optimized internal flow channel maintains excellent linear flow gain, supports flexible switching among position, velocity and pressure three closed-loop control modes.

Heavy-duty hot forging hydraulic press, aluminum alloy extrusion production line, metal rolling mill tension control system, large hydraulic fatigue test bench, automotive mold die-casting clamping hydraulic system.

1.Install 3μm high-pressure precision inline filter on upstream supply pipeline; replace original filter cartridge after 15 working days of equipment commissioning startup.2.Arrange power cable and shielded control wire inside independent wiring ducts to avoid frequency converter harmonic interference to analog control signal.3.Null bias and flow gain are pre-calibrated at MOOG original factory; only tiny potentiometer fine adjustment is allowed on-site; full disassembly of ServoJet pilot assembly and main spool is strictly forbidden.4.Seal all unused hydraulic ports with dedicated blank plugs during spare part storage; store inside dry dustproof warehouse to prevent rubber seal ageing and medium leakage.