Model Code Definition

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

D01 = Spool configuration: O-type center spool, spring return to neutral on power loss for fail-safe load locking

J = Fluid & seal specification: NBR rubber seal, designed for standard mineral-based hydraulic oil working medium

Z = Customized factory flow trim & null calibration parameter

BM = Pressure rating and internal drain layout: internal T drain + separate external Y drain port structure

6 = Electrical connector type: standard 7-pin military circular receptacle

NS = Control signal standard: ±10VDC differential analog input with full-range LVDT spool feedback

D2 = Internal pilot component revised version number

-A = Original factory final assembly batch mark

Technical Specifications

Hydraulic Parameters

Rated Flow: 218 L/min @35bar single metering land pressure drop; max approximate 392 L/min under 70bar differential supply pressure

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

Dynamic Response: Full 0~100% step response ≤28.1ms at 210bar supply pressure

Control Accuracy: Hysteresis＜0.19%FS, Resolution＜0.09%FS, total thermal drift (-20℃~+55℃)＜2.35%FS

Null Leakage: 0.59~3.38 L/min

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

Net Weight: 3.79kg

Electrical Parameters

Power Supply: 24VDC wide-range input (18~32VDC), static operating current ≤685mA

Standard Command Signal: ±10VDC differential analog input; optional ±10mA /4~20mA current signal upon special customization

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

Port & Connection Configuration

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

Electrical Interface: 7-pin military circular receptacle integrating power supply, analog control 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 regulation, no fieldbus digital communication interface

Core Functions

Patented ServoJet jet-pipe pilot structure delivers superior anti-contamination performance versus traditional nozzle-flapper pilot, ensuring long-term stable continuous operation under moderately contaminated hydraulic fluid in harsh industrial working environments.

Embedded full-spool LVDT closed-loop matching onboard amplifier automatically compensates ambient-temperature-triggered null drift, supporting uninterrupted 24-hour full-load running.

D01 O-center spring return spool design: spool resets to mid-position upon power failure to lock A/B oil chambers and secure load position to satisfy equipment fail-safe protection requirement.

Optimized internal flow passage keeps linear flow gain, supporting 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 sheet metal stamping production line, medium-width steel strip rolling mill tension control, multi-specimen hydraulic fatigue test bench, precision injection molding clamping system, medium-sized composite material hot-press forming equipment.

Installation & Maintenance Instructions

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

Separate high-current power cable and shielded control wire inside independent wiring ducts to avoid frequency converter harmonic interference to analog control command.

Null offset and flow gain are 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 forbidden.

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