Model Code Definition

D662 = Base series: NG16 ISO4401-07 mounting dimension, ServoJet jet-pipe pilot structure, embedded integrated servo amplifier

Z4813 = Exclusive factory trim code defining fixed rated flow, preset null offset, customized pilot parts and factory-locked amplifier gain parameters

Plain no suffix = Standard PCB circuit + FKM fluorocarbon standard sealing for conventional temperature working condition

Technical Specifications

Hydraulic Parameters

Rated Flow: 228 L/min @35bar single-land differential pressure; Max flow 369 L/min @70bar supply differential pressure

Max Working Pressure: P/A/B main ports 350bar; Internal T drain ≤50bar; Independent Y external drain full 350bar rating

Full Stroke Step Response: ≤24.9ms at 210bar standard test supply pressure

Control Accuracy: Hysteresis＜0.19%FS, Resolution＜0.075%FS, regular temperature drift (0~+55℃)＜2.28%FS

Null Leakage: 0.47~2.93 L/min

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

Net Weight: 3.76kg

Electrical Parameters

Power Supply: 24VDC wide input (18~32VDC), static quiescent current ≤676mA

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

EMC Compliance: EN55011 industrial standard; 7-pin military circular connector with IP65 protection after cable assembly

Port & Connection Configuration

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

Electrical Interface: 7-pin military circular receptacle integrating power supply, analog setpoint 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 owns superior contamination resistance versus traditional nozzle-flapper pilot to sustain steady continuous operation under moderately contaminated hydraulic oil in common workshop environment.

Onboard amplifier matches full-spool LVDT closed-loop to automatically offset mild normal-temperature null shift; standard circuit satisfies conventional factory stable running demand.

Spring-centered fail-safe spool design: spool mechanically returns to neutral upon power cut-off to isolate A/B oil chambers and fix workpiece position for equipment safety protection.

Optimized internal oil gallery keeps consistent linear flow gain to support flexible switching among position, velocity and pressure closed-loop control modes.

Typical Application

Medium hot forging hydraulic press, regular automotive sheet stamping line, common steel strip mill tension control, standard hydraulic component fatigue test bench, medium composite hot-press molding equipment, conventional injection molding clamping hydraulic 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.

Route power cables and shielded control wires inside separated wiring ducts to avoid inverter harmonic interference on analog command signal.

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

Plug all unused hydraulic ports with dedicated blank plugs during spare storage; store inside dry dustproof warehouse to prevent FKM seal ageing and fluid leakage.