Model Code Definition

D662 = NG16 ISO4401-07 installation dimension, ServoJet jet-pipe pilot construction, onboard integrated amplifier base series

Z2768 = Factory exclusive custom trim code including spool flow rating, null bias preset, internal pilot component modification and customized gain calibration

D = Fluorocarbon FKM seal configuration + revised drain structure factory suffix mark

Technical Specifications

Hydraulic Parameters

Rated Flow: 238 L/min @35bar single land differential pressure; maximum 412 L/min under 70bar supply differential pressure

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

Dynamic Response: Full stroke 0~100% step response ≤27.8ms at 210bar supply pressureMoog Inc.

Control Accuracy: Hysteresis＜0.18%FS, Resolution＜0.08%FS, total thermal drift (-20℃~+55℃)＜2.25%FS

Null Leakage: 0.58~3.35 L/min

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

Net Weight: 3.82kg

Electrical Parameters

Power Supply: 24VDC wide input range (18~32VDC), static operating current ≤695mA

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

EMC Compliance: Complies with EN55011 industrial EMC standard; electrical connector with IP65 protection grade with mounted cable plug

Port & Connection Configuration

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

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 features outstanding contamination resistance compared to conventional nozzle-flapper pilot, ensuring long-term stable continuous operation under moderately polluted hydraulic fluid in severe industrial environments。

Embedded full-spool LVDT closed-loop cooperating with onboard amplifier automatically compensates temperature-induced null drift, supporting nonstop 24-hour full-load continuous operation。

Factory preset spring-centered fail-safe spool design: spool automatically returns to neutral upon power loss to lock A/B oil chambers and fix workpiece position for equipment safety protection。

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

Typical Application

Medium-large tonnage hot forging hydraulic press, automotive heavy stamping production line, medium-width steel strip mill tension control, multi-channel hydraulic fatigue test bench, composite material hot-press forming equipment, large precision injection molding clamping system。

Installation & Maintenance Instructions

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

Separate high-current power cables and shielded control wires inside independent wiring ducts to avoid frequency converter harmonic interference on analog control signals。

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

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