Model Code Definition

D662 = Base series, NG16 ISO4401-07 mounting dimension, ServoJet jet-pipe pilot structure, onboard integrated servo amplifier, no external drive needed

Z4372 = Exclusive factory flow trim code, defines fixed nominal flow, original null setting, fixed amplifier gain and customized internal pilot assembly parameter

A = Standard calibration grade, basic circuit configuration, regular sealing specification, factory standard finished calibration without customized temperature compensation upgrade

Technical Specifications

Hydraulic Parameters

Rated Flow:180 L/min @35bar single orifice differential pressure; peak instantaneous flow 292 L/min @70bar supply differential pressure

Max Working Pressure:P/A/B main ports 350bar; inner T drain ≤50bar; separate Y external drain withstand full 350barMoog Inc.

Full Stroke Step Response:≤23.2ms under standard 210bar supply test pressure

Control Precision:Hysteresis＜0.20%FS, Resolution＜0.08%FS, normal temp drift (0~+50℃)＜2.3%FS

Null Leakage:0.42~2.8 L/min

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

Net Weight:3.72kg

Electrical Parameters

Power Input:24VDC input range(18~32VDC), static standby current ≤660mA

Standard Control Signal:±10VDC differential analog input; optional ±10mA /4~20mA current command on special order

EMC Compliance:EN55011 industrial electromagnetic standard, standard 7-pin circular military connector with IP65 protection after complete wiringMoog Inc.

Port & Connection Configuration

Hydraulic Interface:Standard ISO4401 NG16 mounting hole arrangement, independent P supply port, A/B actuator control ports, built-in T drain and separated Y external drain port

Electrical Interface:7-pin circular receptacle integrating power supply, analog command and full-range LVDT feedback wiring; double-shielded control cable with single-point cabinet grounding

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

Core Functions

1.Patented ServoJet jet-pipe pilot has superior anti-contamination capability compared with conventional nozzle-flapper pilot, maintaining continuous steady operation under moderately contaminated hydraulic oil in ordinary workshop environment.

2.Built-in matched amplifier and full-travel LVDT closed-loop structure automatically compensates minor null shift caused by regular ambient temperature variation; standard A-version circuit meets conventional industrial stable operating requirements.

3.Spring-centered mechanical reset design:main spool returns to neutral position automatically upon power failure, cutting off A/B oil path to lock actuator position for equipment safety protection.

4.Optimized internal flow channel keeps linear flow gain, supports flexible switching among position, velocity and pressure three closed-loop control modes.

Typical Application

Medium-size hydraulic stamping press, non-ferrous metal extrusion equipment, paper machine roll gap control system, general-purpose hydraulic fatigue test bench, standard die-casting mold clamping hydraulic unit.

Installation & Maintenance Instructions

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

2.Arrange power cable and shielded control wire in separated wiring troughs to avoid frequency converter harmonic interference on analog control signal.

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

4.Plug all unused hydraulic ports with dedicated blank plugs during spare stock storage; store in dry dustproof warehouse to prevent rubber seal ageing and medium leakage.