Model Code Definition

D662 = NG16 ISO4401-07 mounting dimension, ServoJet jet-pipe pilot structure, built-in integrated drive amplifier base seriesMoog Inc.

Z4311 = Exclusive factory flow trim code, fixed rated flow parameter, preset null bias, customized pilot assembly and onboard amplifier gain setting

K = Special factory modification: optimized internal oil runner & low-temperature anti-drift control circuit, enhanced stability under wide ambient temperature fluctuation

Technical Specifications

Hydraulic Parameters

Rated Flow: 248 L/min @35bar single edge differential pressure; peak 425 L/min under 70bar supply differential pressure

Max Working Pressure: P/A/B main ports 350bar; internal T drain ≤50bar; separated Y external drain up to 350bar

Full Stroke Step Response: ≤25.8ms at 210bar supply pressure

Control Precision: Hysteresis＜0.16%FS, Resolution＜0.065%FS, full-range temperature drift (-20℃~+55℃)＜1.95%FS

Null Leakage: 0.45~2.90 L/min

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

Net Weight: 3.76kg

Electrical Parameters

Power Supply: 24VDC wide range input (18~32VDC), static standby operating current ≤675mA

Standard Command Signal: ±10VDC differential analog input; ±10mA /4~20mA current signal optional for factory special orderMoog Inc.

EMC Standard: Complies with EN55011 industrial EMC specification; 7-pin military circular connector with IP65 protection after cable assembly

Port & Connection Configuration

Hydraulic Interface: Standard ISO4401-07 NG16 bolt layout; P supply port, A/B actuator control ports, built-in T internal drain port, independent Y external drain port

Electrical Interface: 7-pin military circular receptacle integrating power supply, analog command signal and full-range LVDT feedback wiring; double-shielded control cable with single-point grounding at control cabinet; pure analog closed-loop control, no digital fieldbus interface

Core Functions

Patented ServoJet jet-pipe pilot features outstanding anti-contamination performance vs conventional nozzle-flapper pilot, ensuring long-term stable operation under slightly contaminated hydraulic fluid in harsh industrial environment穆格中国.

Full-spool LVDT closed-loop matched with internal onboard amplifier automatically compensates temperature-caused null drift; K-version optimized circuit improves low-temperature stability under fluctuating ambient environment.

Spring-centered fail-safe spool design: spool automatically returns to neutral position upon power cut-off to lock A/B oil chambers and fix load position for mechanical safety protection.

Linear optimized internal flow passage maintains stable flow gain, supports flexible switching of position, velocity and pressure closed-loop control on single valve body.

Typical Application

Heavy-duty automotive stamping production line, medium-large hot forging hydraulic press, steel strip mill tension control equipment, hydraulic component fatigue test bench, aerospace composite forming hot-press machine, precision large die-casting clamping hydraulic system.

Installation & Maintenance Instructions

Install 3μm high-pressure precision inline filter on upstream supply pipeline; replace original filter cartridge after 15 working days of equipment commissioning startup.

Separate high-power power cable and shielded control wire inside different wiring troughs to avoid frequency converter harmonic interference to analog control signal.

Null offset and flow gain are fully pre-calibrated at MOOG factory; only tiny on-site potentiometer fine adjustment allowed; complete disassembly of ServoJet pilot and main spool is strictly prohibited.

Block all hydraulic ports with dedicated blank plugs during long-term spare storage; store in dry dustproof warehouse to prevent FKM fluororubber seal ageing and oil leakage.