Model Code Definition

D662 = NG16 ISO4401-07 installation dimension, ServoJet jet pipe pilot structure, internal embedded electronic amplifier base series

Z4151 = Custom factory trim code including fixed rated flow setting, preset null offset, modified internal pilot parts and factory locked amplifier gain parameters

Plain no-end suffix = Standard FKM fluororubber sealing, conventional drain flow path designMoog Inc..

Technical Specifications

Hydraulic Parameters

Rated Flow: 245 L/min @35bar single land differential pressure; max 428 L/min under 70bar supply differential pressure

Max Working Pressure: P/A/B main ports 350bar; built-in internal T drain ≤50bar; standalone Y external drain up to 350bar穆格中国

Dynamic Response: Full 0~100% spool stroke step response ≤27.2ms under 210bar supply pressure

Control Accuracy: Hysteresis＜0.18%FS, Resolution＜0.075%FS, full-range ambient temperature drift (-20℃~+55℃)＜2.18%FS

Null Leakage: 0.50~3.08 L/min

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

Net Weight: 3.75kg

Electrical Parameters

Power Supply: 24VDC wide input range (18~32VDC), static standby current ≤680mA

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

EMC Compliance: Conforms to EN55011 industrial EMC specification; military circular connector reaches IP65 protection after cable assembly.

Port & Connection Configuration

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

Electrical Interface: 7-pin military circular receptacle integrating power supply, analog setpoint signal and full-travel LVDT feedback wiring; double-shielded control cable with single-point grounding at control cabinet terminal

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

Core Functions

Patented ServoJet jet pipe pilot delivers superior anti-contamination property versus traditional nozzle-flapper pilot, ensuring stable uninterrupted operation under moderately contaminated hydraulic fluid in severe industrial environments.

Built-in full-spool LVDT closed loop cooperates with onboard amplifier to automatically compensate null drift induced by temperature variation, supporting 24h continuous full-load running.

Factory pre-set spring-centering fail-safe spool: spool returns to neutral position automatically upon power loss to lock A/B oil chambers and fix load position for equipment safety protectionMoog Inc..

Optimized internal runner maintains linear flow gain, freely switches among position, velocity and pressure closed-loop control modes on single valve body.

Typical Application

Large hot forging hydraulic press, automotive heavy stamping production line, wide strip steel mill tension control, hydraulic component durability fatigue test bench, aerospace composite hot-press molding machine, large precision injection molding clamping control system.

Installation & Maintenance Instructions

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

Separate high-power power cables and shielded control wires in different wiring grooves to avoid inverter harmonic interference on analog control signal.

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

Seal all hydraulic ports with dedicated blocking plugs during long-term spare storage; store inside dry dustproof warehouse to prevent FKM seal ageing and oil leakage.