Model Code Definition

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

Z4380 = Exclusive factory trim code covering fixed rated flow parameter, pre-set null offset, customized pilot component and factory locked amplifier gain setting

No suffix letter = Standard regular circuit + standard FKM fluorocarbon sealing configuration for conventional indoor operating environment

Technical Specifications

Hydraulic Parameters

Rated Flow: 230 L/min @35bar single land differential pressure; maximum instantaneous flow 372 L/min under 70bar supply differential pressure

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

Full Stroke Step Response: ≤24.6ms at standard 210bar supply pressure

Control Accuracy: Hysteresis＜0.19%FS, Resolution＜0.075%FS, overall thermal drift (0℃~+55℃)＜2.25%FS

Null Leakage: 0.47~2.95 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 input (18~32VDC), static quiescent operating current ≤678mA

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

EMC Compliance: Conforms to EN55011 industrial EMC 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 internal T drain port, independent Y external drain port

Electrical Interface: 7-pin military circular receptacle integrating power supply, analog command 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-contamination performance compared to traditional nozzle-flapper pilot, enabling stable continuous operation under moderately contaminated hydraulic fluid in ordinary industrial workshop environments.

Onboard amplifier cooperates with full-spool LVDT closed-loop to automatically compensate mild null drift caused by normal ambient temperature variation; standard circuit matches conventional indoor operating requirements.

Spring-centered fail-safe spool design: spool mechanically returns to neutral upon power failure to block A/B oil passages and fix load position for equipment safety protection.

Optimized internal flow passages maintain stable linear flow gain to support flexible switching among position, velocity and pressure closed-loop control modes.

Typical Application

Medium tonnage hot forging press, automotive medium sheet stamping line, general steel strip mill tension control system, standard hydraulic fatigue test bench, regular composite hot-press molding equipment, medium-size 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.

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

Null offset 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 forbidden.

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