Model Code Definition

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

Z1912 = Factory customized flow trim, spool null calibration, internal pilot component modification batch code

E = Seal specification & customized internal drain layout revision mark

Technical Specifications

Hydraulic Parameters

Rated Flow: 212 L/min @35bar single metering land differential pressure; max 385 L/min under 70bar supply pressure difference

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

Dynamic Response: Full 0~100% stroke step response ≤28.5ms at 210bar supply pressure

Control Accuracy: Hysteresis＜0.20%FS, Resolution＜0.09%FS, full temperature drift (-20℃~+55℃)＜2.40%FS

Null Leakage: 0.62~3.42 L/min

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

Net Weight: 3.78kg

Electrical Parameters

Power Supply: 24VDC wide input range (18~32VDC), static working current ≤692mA

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

EMC Compliance: Conforms to EN55011 industrial EMC standard; military circular electrical connector IP65 protection grade

Port & Connection Configuration

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

Electrical Interface: Standard 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 terminal

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

Core Functions

Patented ServoJet jet-pipe pilot delivers superior anti-pollution performance vs conventional nozzle-flapper pilot, ensuring long-term steady continuous operation under moderately contaminated hydraulic fluid in severe industrial working environments.

Embedded full-spool LVDT closed-loop matching onboard amplifier automatically offsets ambient-temperature-caused null drift, supporting nonstop 24-hour full-load continuous running.

Factory customized center spool with spring reset upon power loss to lock A/B oil cavities and fix load position to satisfy equipment fail-safe protection requirement.

Optimized internal flow passage maintains linear flow gain, enabling flexible switching among position, velocity and pressure closed-loop control modes on single valve body.

Typical Application

Hot forging hydraulic press, automotive sheet metal stamping line, steel strip mill tension control, hydraulic material fatigue test bench, precision composite hot-forming equipment, large-tonnage injection molding clamping system.

Installation & Maintenance Instructions

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

Separate high-current power wiring and shielded control cable inside independent wiring trunking to avoid inverter harmonic interference against analog control signal.

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

Seal all hydraulic ports with dedicated blocking plugs during long-term spare storage; store within dry dustproof warehouse to prevent rubber seal aging and hydraulic fluid leakage.